Hsinchu Science Park, Taiwan, February 1st, 2005 - Sunplus Technology Co., Ltd. (TSE: 2401, FTSE: SUPD) today announced its financial results of 2004. From January to December in 2004, the net sales added up to NT$18,940 million, which grew 70.7% comparing with 2003. The net income in 2004 were NT$2,738 million, which earnings per share were NT$ 3.13 based on current 875,254.4 thousand shares after dividend.

The net sales of 4Q'04 totaled NT$5,014 million,and product gross margin of 4Q'04 dropped to 27.5% due to product mix change, US dollar depreciation and product ASP decline. The R&D expenses in 4th Quarter were 11.0% of the net sales. The SG&A expenses in 4th Quarter were 7.6% of the sales because higher sales commission and service charges. The net income in 4Q'04 amounted NT$344 million, and the earnings per share would be NT$0.39 based on the current 875,254.4 thousand shares.

(in NT$ thousand) 2004 2003 YoY Amount Ratio Amount Ratio Net Sales 18,940,056 100.0% 11,097,653 100.0% 70.7% Gross Margin 5,943,206 31.4% 3,822,309 34.4% 55.5% Operating Income 2,926,528 15.5% 1,978,627 17.8% 47.9% Net Income 2,737,691 14.5% 2,006,971 18.1% 36.4% EPS(NT$) * Based on 875,254.4 Thousand Shares 3.13 2.29

(in NT$ thousand) 4Q2004 4Q2003 YoY Amount Ratio Amount Ratio Net Sales 5,014,302 100.0% 3,761,751 100.0% +33.3% Gross Margin 1,377,933 27.5% 1,283,486 34.1% +7.4% Operating Income 447,986 8.9% 772,712 20.5% -42.0% Net Income 344,125 6.9% 802,381 21.3% -57.1% EPS(NT$) * Based on 875,254.4 Thousand Shares 0.39 0.92

(in NT$ thousand) 4Q2004 3Q2004 QoQ Amount Ratio Amount Ratio Net Sales 5,014,302 100.0% 5,452,778 100.0% -8.0% Gross Margin 1,377,933 27.5% 1,880,965 34.5% -26.7% Operating Income 447,986 8.9% 1,027,189 18.8% -56.4% Net Income 344,125 6.9% 1,032,419 18.9% -66.7% EPS(NT$) * Based on 875,254.4 Thousand Shares 0.39 1.18