DENVER, CO -- (Marketwire) -- 11/07/12 -- Golden Star Resources Ltd. (NYSE MKT: GSS) (TSX: GSC) (GHANA: GSR)

Third quarter gold sales up 9% to 80,826 ounces from 73,861 ounces in Q3 last year

Year-to-date gold sales up 6% to 243,734 ounces from 230,309 ounces in 2011

Revenue up 6% in Q3 to $133.5 million and up 14% year-to-date to $400.8 million vs. 2011

Third quarter operating cash flow before changes in working capital(2) of $29.8 million ($0.12 per share) vs. $7.2 million ($0.03 per share) in 2011

Nine-month operating cash flow before changes in working capital of $83.9 million ($0.32 per share) vs. $24.7 million ($0.10 per share) in 2011

Third quarter cash flow from operations of $24.3 million ($0.09 per share) vs. $11.5 million ($0.04 per share) in Q3 2011 - five straight quarters of positive cash flow

Nine-month cash flow from operations of $59.8 million ($0.23 per share) vs. $4.2 million ($0.02 per share) in 2011

Cash operating costs per ounce continue to improve on year-over-year basis

Golden Star Resources Ltd. (NYSE MKT: GSS) (TSX: GSC) (GHANA: GSR) ("Golden Star" or the "Company") today reported unaudited financial results prepared in accordance with US GAAP for the third quarter and nine-month period ended September 30, 2012.

Third Quarter Highlights
The Company produced and poured 83,287 ounces of gold in the third quarter of 2012, of which 80,826 ounces were sold, yielding a 9% increase over 73,861 ounces sold in the same quarter last year. Cash operating costs per ounce in the third quarter improved to $992, a 10% reduction from $1,108 in the third quarter last year. The higher gold production led to a 6% increase in revenue in the third quarter of 2012 to $133.5 million from $125.9 million in the same quarter a year ago. The net loss attributable to Golden Star shareholders was $30.2 million, or $0.12 per share, versus a net loss of $10.2 million, or $0.04 per share, in the third quarter of 2011. Adjusted net loss (refer to footnote 1) for the third quarter was $0.1 million, or $0.00 per share, compared with adjusted net income of $3.0 million, or $0.01 per share, for the third quarter of 2011.

Golden Star generated $24.3 million, or $0.09 per share, in cash from operations in the third quarter, up from $11.5 million, or $0.04 per share, in the same quarter last year. It was the Company's fifth consecutive quarter of positive cash flow. Operating cash flow before changes in working capital (refer to footnote 2) in the third quarter was $29.8 million, or $0.12 per share, up from $7.2 million, or $0.03 per share, in the third quarter a year ago.

Nine-Month Highlights
For the first nine months of 2012, Golden Star produced and poured 246,195 ounces of gold, of which 243,734 ounces were sold, representing a 6% increase over 230,309 ounces sold in the third quarter a year ago. Year-to-date cash operating costs per ounce improved to $1,007 versus $1,054 in the same period last year. Higher gold production and an 8% increase in average realized gold price resulted in 2012 year-to-date revenue of $400.8 million, up 14% from $352.2 million in the same period a year ago. Year-to-date net loss attributable to Golden Star shareholders was $18.6 million, or $0.07 per share, versus a net loss of $9.3 million, or $0.04 per share, through the first nine months of 2011. Adjusted net loss for the nine month period of 2012 was $8.1 million or $0.03 per share compared with an adjusted net loss of $13.7 million, or $0.05 per share, in the first nine months of 2011.

Cash flow from operations through the first nine months of 2012 increased to $59.8 million, or $0.23 per share, up from $4.2 million, or $0.02 per share, in the same period last year. Operating cash flow before changes in working capital was $83.9 million, or $0.32 per share, for the first nine months of 2012, up from $24.7 million, or $0.10 per share, for the same period in 2011.

"Golden Star delivered solid improvements in year-over-year results in the third quarter and nine month period, with increased gold production, higher revenue and our fifth consecutive quarter of positive cash flow," said Tom Mair, President and CEO. "We are particularly pleased with increased throughput and improved reliability at the Bogoso sulfide plant. Likewise, we're encouraged by the continued strong performance at Wassa, where grade has steadily improved, recovery remains solid at better than 94%, and we've achieved meaningful reductions in per ounce cash operating costs over the past two quarters. We're also excited about the development progress at the Prestea underground mine and the continued positive drilling results beneath the Wassa Main pits, and are optimistic that Wassa may develop into a much larger operation over time."

SUMMARY OF CONSOLIDATED FINANCIAL
 RESULTS                             Three months ended   Nine months ended
(Unaudited)                             September 30,       September 30,
                                       2012      2011      2012      2011
                                     --------  --------  --------  --------

Bogoso/Prestea gold sold (oz)          39,844    40,376   125,201   105,029
Wassa/HBB gold sold (oz)               40,982    33,485   118,533   125,280
Total gold sold (oz)                   80,826    73,861   243,734   230,309

Average realized gold price ($/oz)      1,653     1,704     1,645     1,529
Cash operating cost - combined
 ($/oz)                                   992     1,108     1,007     1,054
Gold revenues ($000s)                 133,497   125,880   400,830   352,193
Cash flow provided by operations
 ($000s)                               24,312    11,467    59,766     4,152
Net loss attributable to
 shareholders ($000s)                 (30,207)  (10,196)  (18,610)   (9,316)
Net loss attributable to
 shareholders ($/share)                 (0.12)    (0.04)    (0.07)    (0.04)

Footnotes:

(1) Adjusted net income/loss: defined as Net Income/Loss adjusted for the impact of derivative mark to market gains/losses, gain/loss on fair value of convertible debentures, gain/loss on sale of investments and gain/loss on extinguishment of debt.

(2) Operating cash flow before changes in working capital: defined as net cash provided by operating activities less changes in working capital. Changes in working capital include changes in accounts receivable, inventories, deposits, accounts payable and accrued liabilities.

BOGOSO/PRESTEA RECAP
Bogoso/Prestea consolidated gold sales in the third quarter totaled 39,844 ounces, down marginally from 40,376 ounces in the same quarter last year. Gold sales from the Bogoso sulfide plant totaled 30,277 ounces in the third quarter, down from 40,376 ounces in the same quarter a year ago due to lower ore grades and lower gold recoveries. That decline was partially offset by non-refractory gold sales of 9,567 ounces from the oxide plant, which restarted processing operations in the first quarter of 2012. Cash operating costs for Bogoso/Prestea were $1,171 per ounce in the third quarter, down 5% from $1,238 per ounce in the same quarter last year but up 17% over the second quarter of 2012 due to lower grade of mill feed.

The Company continued to make progress at the sulfide mill, which achieved the highest ore throughput in six quarters. The mill head grade was lower as the Company processed significant volumes of lower grade stockpile material, which, in turn, impacted recovery. Over the past year, reflecting the inflationary cost environment across the mining industry, Bogoso/Prestea unit mining costs increased approximately 15%. Due to improved cost controls, unit processing costs at the sulfide plant declined approximately 20%, partially offsetting the higher mining costs.

Operations at the oxide mill were affected by lower than expected grades and recoveries. Throughput was impacted by mechanical reliability and tails pumping issues. The Company made progress during the third quarter and expects improved throughput going forward.

In response to higher gold prices and new ore zones, current mining plans anticipate substantial pit wall pushbacks at both the Bogoso North and Chujah pits over the next two years which are expected to result in temporarily high stripping ratios. This work will prepare the pits for lower stripping ratios and improved cashflows in 2015 and beyond. We are currently in the planning cycle and alternatives which have the potential to improve the mine plans are being evaluated.

Bogoso/Prestea Key Metrics            3Q-12   2Q-12   1Q-12   4Q-11   3Q-11
                                     ------- ------- ------- ------- -------

Refractory ore mined (000st)             593     605     770     711     594
Non-refractory ore mined (000st)         174     245     141      16      84
Total ore mined (000st)                  767     849     910     727     678
Waste mined (000st)                    5,492   5,014   7,242   8,876   6,884

Refractory ore processed (000st)         687     570     611     493     579
Refractory grade (g/t)                  2.05    2.60    2.55    2.95    2.63
Refractory ore recovery (%)             69.6    71.3    73.3    77.7    75.9
Gold sold (oz) refractory             30,277  34,051  34,338  35,475  40,376

Non-refractory ore processed (000st)     231     202     173      --      --
Non-refractory grade (g/t)              2.04    2.71    2.66      --      --
Non-refractory ore recovery (%)         71.8    62.2    54.1      --      --
Gold sold (oz) non-refractory          9,567  10,064   6,904      --      --

Total gold sold (oz)                  39,844  44,115  41,242  35,475  40,376
Cash operating cost ($/oz)             1,171     999   1,222   1,166   1,238

WASSA/HBB RECAP
Wassa/HBB gold sales in the third quarter increased 22% to 40,982 ounces from 33,485 ounces in the same quarter last year. This increase was attributed to significantly higher grade processed -- 2.31 grams per tonne (g/t) -- in the third quarter as compared with 1.82 g/t in the same quarter a year ago. The improved grade resulted from increased processing of ore from the higher-grade Father Brown pit.

The increase in ounces sold from the Wassa operation, combined with improved cost controls, resulted in a 14% improvement in cash operating costs in the third quarter of 2012 to $817 per ounce from $950 per ounce in the same quarter last year and a 3% improvement from $838 per ounce in the second quarter of 2012. It was the third consecutive quarter that cash operating costs at Wassa/HBB have declined. Despite the input cost increases the industry is experiencing, Wassa's unit mining costs declined approximately 20% over the past year while unit processing costs have remained stable.

Wassa/HBB Key Metrics                 3Q-12   2Q-12   1Q-12   4Q-11   3Q-11
                                     ------- ------- ------- ------- -------

Ore mined (000st)                        660     715     683     639     623
Waste mined (000st)                    4,043   3,818   4,445   3,820   3,927
Ore processed (000st)                    602     641     682     589     601
Grade (g/t)                             2.31    2.06    1.74    2.04    1.82
Recovery (%)                            94.7    94.8    93.9    94.1    93.7
Cash operating cost ($/oz)               817     838     999   1,012     950
Gold sold (oz)                        40,982  41,068  36,483  35,336  33,485

EXPLORATION
During the third quarter Golden Star raised the rig count from two to five in order to accelerate exploration beneath the Wassa Main pits following increasingly positive drilling results in the first half of 2012. The Company completed an additional 49 drill holes in the third quarter totaling 16,485 meters comprising approximately 67% HQ sized diamond drill core and 33% RC (reverse circulation). The results of this latest drilling continued to support the Company's position that mineralization at depth is wider and higher grade than what has been mined to date and that a major expansion of the Wassa pits may lead to significant, long-term production increases from this asset. The Company intends to update its block models and pit optimizations for year-end resource determination. Drilling will continue in 2013 in conjunction with a feasibility study on a potential Wassa expansion.

DEVELOPMENT
A major development project for Golden Star is the West Reef area of the Prestea Underground mine. The West Reef resource totals 874,000 tonnes grading 18.07 g/t for 508,000 ounces of gold in the Indicated category plus an Inferred Mineral Resource of 510,000 tonnes grading 11.58 g/t for 190,000 ounces. As reported in the March 21, 2012, Preliminary Economic Assessment (PEA), in early August 2012 the Company commissioned a new underground drilling rig, which has since been operating on 17 level of the West Reef. Results from the drilling program will be incorporated into the information being gathered for the West Reef feasibility study, which is expected to be completed in early 2013.

LIQUIDITY AND CAPITAL RESOURCES
At September 30, 2012, Golden Star had $106.3 million in cash and cash equivalents, up slightly from $105.7 million at the end of the second quarter of 2012 and up from $103.6 million at 2011 year-end. The Company has an additional $19.8 million in borrowing capacity available under its equipment financing credit facility.

During the third quarter Golden Star redeemed $6.1 million of its 4.00% Convertible Senior Unsecured Debentures due November 30, 2012, leaving $44.4 million outstanding principal. The Company will pay the outstanding principal plus accrued interest in cash.

Golden Star invested approximately $19.1 million in capital projects in the third quarter, including $11.1 million for development projects and $8.0 million for the acquisition of new equipment and facilities at its mine sites. The Company expects to invest approximately $30 to $35 million in capital projects in the fourth quarter of 2012, including Bogoso and Wassa plant upgrades, development drilling and a new tailings facility at Wassa, construction of a water treatment plant, and ongoing development and drilling at the Prestea underground mine.

In 2013 the Company expects to invest $100 to $125 million. Major projects include the development of the Dumasi pit, Bogoso plant upgrades, Phase 1 of the Prestea underground mine development, Wassa drilling programs, the new Wassa tailings facility and sustaining capital requirements. At current gold prices, the Company expects that current cash on hand, operating cashflow and borrowing under the equipment financing facility will be sufficient to meet these capital requirements.

2012 GUIDANCE
                        Bogoso/Prestea          Wassa/HBB           Combined
                    ------------------ ------------------ ------------------
Oz produced         175,000 to 178,000 158,000 to 160,000 333,000 to 338,000
Cash operating cost
 ($/oz)                 1,100 to 1,180         950 to 985     1,040 to 1,100

Notes:
1. Power and fuel prices used in the guidance are $0.16 per kilowatt-hour and $1.33 per liter, respectively.
2. Starting in late 2012, and continuing through 2014, water treatment costs are estimated to add approximately $60 per ounce at Bogoso, but should drop significantly thereafter when the current backlog of process water is treated.

Third Quarter Conference Call
The Company will conduct a conference call and webcast at 11:00 a.m. Eastern Time on November 8, 2012. Please call in at least five minutes prior to the conference call start time to ensure prompt access to the conference. The call can be accessed by telephone or by webcast as follows:

North American participants: (877) 407-8289
Participants outside U.S. and Canada: (201) 689-8341
Webcast: www.gsr.com

A recording of the conference call will be available until November 29, 2012, through the Company's website at www.gsr.com or by dialing:

North America: (877) 660-6853, Conference ID number: 401439
International outside U.S. and Canada: (201) 612-7415, Conference ID number: 401439

                         GOLDEN STAR RESOURCES LTD.
                        CONSOLIDATED BALANCE SHEETS
 (Stated in thousands of U.S. dollars except shares issued and outstanding)
                                (unaudited)

                                                   As of          As of
                                               September 30,   December 31,
                                                    2012           2011
                                               -------------  -------------
ASSETS
CURRENT ASSETS
  Cash and cash equivalents                    $     106,322  $     103,644
  Accounts receivable                                  8,113         10,077
  Inventories                                         91,876         74,297
  Deposits                                             8,505          6,474
  Available for sale investments                      17,817          1,416
  Prepaids and other                                   2,173          2,048
                                               -------------  -------------
    Total Current Assets                             234,806        197,956
RESTRICTED CASH                                        2,028          1,273
PROPERTY, PLANT AND EQUIPMENT                        256,338        252,131
INTANGIBLE ASSETS                                      3,685          5,266
MINING PROPERTIES                                    252,496        270,157
OTHER ASSETS                                              --            895
                                               -------------  -------------
    Total Assets                               $     749,353  $     727,678
                                               =============  =============
LIABILITIES
CURRENT LIABILITIES
  Accounts payable                             $      28,829  $      40,708
  Accrued liabilities                                 53,981         51,380
  Asset retirement obligations                         7,886          8,996
  Current tax liability                                   --            197
  Current debt                                        51,270        128,459
                                               -------------  -------------
    Total Current Liabilities                        141,966        229,740
LONG TERM DEBT                                       116,642         10,759
ASSET RETIREMENT OBLIGATIONS                          22,716         24,884
DEFERRED TAX LIABILITY                                43,457         23,993
                                               -------------  -------------
    Total Liabilities                          $     324,781  $     289,376
                                               -------------  -------------
COMMITMENTS AND CONTINGENCIES                             --             --
SHAREHOLDERS' EQUITY
SHARE CAPITAL
  First preferred shares, without par value,
   unlimited shares authorized. No shares
   issued and outstanding                                 --             --
  Common shares, without par value, unlimited
   shares authorized. Shares issued and
   outstanding: 258,950,971 at September 30,
   2012; 258,669,487 at December 31, 2011      $     694,480  $     693,899
CONTRIBUTED SURPLUS                                   23,903         19,815
ACCUMULATED OTHER COMPREHENSIVE INCOME                 1,707          1,978
DEFICIT                                             (294,722)      (276,112)
                                               -------------  -------------
    Total Golden Star Equity                         425,368        439,580
NONCONTROLLING INTEREST                                 (796)        (1,278)
                                               -------------  -------------
    Total Equity                                     424,572        438,302
                                               -------------  -------------
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY     $     749,353  $     727,678
                                               =============  =============


                         GOLDEN STAR RESOURCES LTD.
                   CONSOLIDATED STATEMENTS OF OPERATIONS
   (Stated in thousands of U.S. dollars except shares and per share data)
                                (unaudited)

                                 For the three months   For the nine months
                                         ended                 ended
                                     September 30,         September 30,
                                 --------------------  --------------------
                                    2012       2011       2012       2011
                                 ---------  ---------  ---------  ---------
REVENUE
Gold revenues                    $ 133,497  $ 125,880  $ 400,830  $ 352,193
Cost of sales                      120,899    106,385    354,914    316,661
                                 ---------  ---------  ---------  ---------
  Mine operating margin             12,598     19,495     45,916     35,532
Exploration expense                    583      1,824      2,674      3,972
General and administrative
 expense                             4,606      5,996     16,091     20,350
Derivative mark-to-market loss          --     11,161        162     17,840
Loss/(gain) on fair value of
 convertible debentures             30,055      2,084     32,092    (22,208)
Property holding costs               1,617      1,778      5,027      6,141
Foreign exchange loss                  282        666      2,162      1,385
Interest expense                     2,067      2,193      8,563      6,663
Interest and other income              (89)       (61)      (357)      (163)
Gain on sale of assets                 (52)      (338)      (113)      (336)
Loss/(gain) on sale of
 investments                            70         --    (22,290)        --
(Gain)/loss on extinguishment of
 debt                                  (14)        --        568         --
                                 ---------  ---------  ---------  ---------
    (Loss)/income before income
     tax                           (26,527)    (5,808)     1,337      1,888
Income tax expense                  (4,002)    (3,621)   (19,464)   (11,727)
                                 ---------  ---------  ---------  ---------
    Net loss                     $ (30,529) $  (9,429) $ (18,127) $  (9,839)
Net income/(loss) attributable
 to noncontrolling interest            322       (767)      (483)       523
                                 ---------  ---------  ---------  ---------
    Net loss attributable to
     Golden Star shareholders    $ (30,207) $ (10,196) $ (18,610) $  (9,316)
                                 =========  =========  =========  =========

Net loss per share attributable
 to Golden Star shareholders
Basic                            $   (0.12) $   (0.04) $   (0.07) $   (0.04)
Diluted                          $   (0.12) $   (0.04) $   (0.07) $   (0.04)
Weighted average shares
 outstanding (millions)              258.9      258.6      258.8      258.6
Weighted average shares
 outstanding-diluted (millions)      258.9      258.6      258.8      258.6



                         GOLDEN STAR RESOURCES LTD.
                   CONSOLIDATED STATEMENTS OF CASH FLOWS
   (Stated in thousands of U.S. dollars except shares and per share data)
                                 (unaudited)

                                 For the three months   For the nine months
                                         ended                 ended
                                     September 30,         September 30,
                                 --------------------  --------------------
                                    2012       2011       2012       2011
                                 ---------  ---------  ---------  ---------
OPERATING ACTIVITIES:
Net loss                         $ (30,529) $  (9,429) $ (18,127) $  (9,839)
Reconciliation of net loss to
 net cash provided by operating
 activities:
  Depreciation, depletion and
   amortization                     25,541     15,621     69,765     52,113
  Amortization of loan
   acquisition costs                    --        321        895        993
  Loss/(gain) on sale of
   investments                          70         --    (22,290)        --
  (Gain)/loss on extinguishment
   of debt                             (14)        --        568         --
  Gain on sale of assets               (52)      (338)      (113)      (336)
  Non-cash employee compensation     1,033        564      4,737      2,784
  Deferred income tax expense        4,002      2,908     19,464      9,255
  Fair value of derivatives loss        --      1,700        162      6,879
  Fair value loss/(gain) on
   convertible debt                 30,055      2,084     32,092    (22,208)
  Accretion of asset retirement
   obligations                         703      2,184      2,111      5,300
  Reclamation expenditures            (967)    (8,416)    (5,389)   (20,244)
  Changes in working capital        (5,530)     4,268    (24,109)   (20,545)
                                 ---------  ---------  ---------  ---------
    Net cash provided by
     operating activities           24,312     11,467     59,766      4,152
INVESTING ACTIVITIES:
  Expenditures on mining
   properties                      (11,079)   (12,211)   (30,942)   (30,242)
  Expenditures on property,
   plant and equipment              (7,996)   (13,678)   (27,616)   (33,541)
  Change in accounts payable and
   deposits on mine equipment
   and material                      2,544      2,499       (145)      (685)
  Increase in restricted cash         (755)        --       (755)        --
  Cash used for equity
   investments                          --     (1,200)      (938)    (1,200)
  Proceeds from sale of assets         399        681      7,084        681
                                 ---------  ---------  ---------  ---------
    Net cash used in investing
     activities                    (16,887)   (23,909)   (53,312)   (64,987)
FINANCING ACTIVITIES:
  Principal payments on debt        (8,055)    (2,622)   (12,476)    (7,960)
  Proceeds from debt agreements
   and equipment financing           1,124      1,391      8,510      4,861
  Exercise of options                   99         52        190        210
                                 ---------  ---------  ---------  ---------
    Net cash used in financing
     activities                     (6,832)    (1,179)    (3,776)    (2,889)
                                 ---------  ---------  ---------  ---------
Increase/(decrease) in cash and
 cash equivalents                      593    (13,621)     2,678    (63,724)
Cash and cash equivalents,
 beginning of period               105,729    127,915    103,644    178,018
                                 ---------  ---------  ---------  ---------
Cash and cash equivalents, end
 of period                       $ 106,322  $ 114,294  $ 106,322  $ 114,294
                                 =========  =========  =========  =========

COMPANY PROFILE
Golden Star Resources holds the largest land package in one of the world's largest and most prolific gold producing regions. The Company holds a 90% equity interest in Golden Star (Bogoso/Prestea) Limited and Golden Star (Wassa) Limited, which respectively own the Bogoso/Prestea and Wassa/HBB open-pit gold mines in Ghana, West Africa. In addition, Golden Star has an 81% interest in the currently inactive Prestea Underground mine in Ghana, as well as gold exploration interests elsewhere in Ghana, in other parts of West Africa and in Brazil in South America. Golden Star has approximately 259 million shares outstanding. Additional information is available at www.gsr.com.

Statements Regarding Forward-Looking Information: Some statements contained in this news release are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 and other applicable securities laws. Investors are cautioned that forward-looking statements are inherently uncertain and involve risks and uncertainties that could cause actual results to differ materially. Such statements include comments regarding improvements to throughput at the Bogoso sulfide plant; our expectations regarding potential expansion at Wassa; the timing of an update to block models and pit optimizations and for updated resource estimates; our plans to advance the Wassa expansion feasibility study; planned investments in capital projects; plans to incorporate drilling results into the West Reef Prestea Underground feasibility study; the timing of completion of the feasibility study for Prestea Underground; plans to repay the outstanding principal of the remaining Original Debentures; and the Company's 2012 production and cash operating cost estimates, including anticipated power and fuel prices and water treatment costs. Factors that could cause actual results to differ materially include timing of and unexpected events at the Bogoso/Prestea non-refractory and sulfide processing plants and at the Wassa processing plant; variations in ore grade, tonnes mined, crushed or milled; variations in relative amounts of refractory, non-refractory and transition ores; delay or failure to receive board or government approvals and permits; the availability and cost of electrical power and fuel; timing and availability of external financing on acceptable terms; technical, permitting, mining or processing issues; changes in U.S. and Canadian securities markets; and fluctuations in gold price and costs and general economic conditions. There can be no assurance that future developments affecting the Company will be those anticipated by management. Please refer to the discussion of these and other factors in our Form 10-K for 2011. The forecasts contained in this press release constitute management's current estimates, as of the date of this press release, with respect to the matters covered thereby. We expect that these estimates will change as new information is received and that actual results will vary from these estimates, possibly by material amounts. While we may elect to update these estimates at any time, we do not undertake to update any estimate at any particular time or in response to any particular event. Investors and others should not assume that any forecasts in this press release represent management's estimate as of any date other than the date of this press release.

Non-GAAP Financial Measures: In this news release, we use the terms "total cash cost per ounce", "cash operating cost per ounce". These are non-GAAP performance measures as defined in SEC Regulation S-K Item 10 and in applicable Canadian securities laws and should not be considered in isolation or as a substitute for performance measures prepared in accordance with GAAP. The Company believes these non-GAAP measures complement conventional measures prepared in accordance with GAAP to enable the Company and investors to evaluate the financial and operating performance of the Company. Changes in numerous factors including, but not limited to, mining rates, milling rates, gold grade, gold recovery, and the costs of labor, consumables and mine site general and administrative activities can cause these measures to increase or decrease. We believe that these measures are the same or similar to the measures of other gold mining companies, but may not be comparable to similarly titled measures in every instance.

The GAAP measure, "Cost of sales", as found in our statements of operations, includes all mine-site operating costs, including the costs of mining, ore processing, maintenance, work-in-process inventory changes, mine-site overhead as well as production taxes, royalties, mine site depreciation, depletion, amortization, asset retirement obligation accretion and by-product credits, but excludes exploration costs, property holding costs, corporate office general and administrative expenses, foreign currency gains and losses, impairment charges, corporate business development costs, gains and losses on asset sales, interest expense, gains and losses on derivatives, gains and losses on investments and income tax expense/benefit.

"Cash operating cost per ounce" for a period is equal to "Cost of sales" for the period less mining related depreciation, depletion and amortization costs, royalties, production taxes, accretion of asset retirement obligation costs, costs that meet the definition of Betterment Stripping under International Financial Reporting Standards ("IFRS") and operations-related foreign currency gains and losses for the period, divided by the number of ounces of gold sold during the period. "Total cash cost per ounce" for a period is equal to "Cash operating costs" for the period plus royalties and production taxes, divided by the number of ounces of gold sold during the period.

We use cash operating cost per ounce and total cash cost per ounce as key operating indicators. We monitor these measures monthly, comparing each month's values to prior periods' values to detect trends that may indicate increases or decreases in operating efficiencies. These measures are also compared against budget to alert management of trends that may cause actual results to deviate from planned operational results. Since these measures do not incorporate revenues, changes in working capital and non-operating cash costs, they are not necessarily indicative of operating profit or cash flow from operations as determined under GAAP.

Cautionary Note to Investors Concerning Estimates of "Indicated Mineral Resources" and "Inferred Mineral Resources"
This release uses the terms "Indicated Mineral Resources" and "Inferred Mineral Resources". The Company advises US investors that while these terms are recognized and required by National Instrument 43-101, the US Securities and Exchange Commission ("SEC") does not recognize them. US Investors are cautioned not to assume that any part or all of the mineral deposits in these categories will ever be converted into a higher category or into mineral reserves. Inferred Mineral Resources have a great amount of uncertainty as to their existence, and great uncertainty as to their economic and legal feasibility. US investors are cautioned not to assume that any part or all of the Inferred Mineral Resource exists, or is economically or legally mineable. Also, disclosure of contained ounces is permitted under Canadian regulations; however the SEC generally requires mineral resource information to be reported as in-place tonnage and grade. The Preliminary Economic Assessment for the West Reef area of the Prestea Underground (the "PEA") is preliminary in nature, it includes Inferred Mineral Resources that are considered too speculative geologically to have economic considerations applied to them that would enable them to be categorized as mineral reserves, there is no assurance that the PEA will be realized and mineral resources that are not mineral reserves do not have demonstrated economic viability.

The technical contents of this press release that relate to the PEA have been reviewed and approved by Dr. Martin Raffield, P.Eng., a Qualified Person pursuant to National Instrument 43-101. Dr. Raffield is Senior Vice President Technical Services for Golden Star. Please refer to the Company's press release dated March 21, 2012, titled "Golden Star Resources Announces Positive Preliminary Economic Assessment for Prestea Underground Mine" for additional information regarding the PEA.