FY2004 and 1Q05 Financial Results May 3, TW/2382 TT. Quanta Computer Inc.

Safe Harbor Notice This presentation contains forward looking statements and is subject to significant risks and uncertainties. Actual results may differ materially from those in the forward looking statements. 2

FY2004 Income Statement - YoY Comparison (Consolidated) FY2004FY2003YoY Revenues330, % 297, % 11% Gross Profit22, % 21, % 6% Op. Profit10, % 12, % -16% Non-Op. Inc.1,7501,000 Pre-tax Inc.12, % 13, % -10% Net Income11, % 13, % -10% Basic EPS (NT$) All figures in NT$MN except for per share data 3

FY2004 Income Statement - YoY Comparison (Unconsolidated) FY2004FY2003YoY Revenues324, % 292, % 11% Gross Profit16, % 17, % -2% Op. Profit7, % 10, % -28% Non-Op. Inc.4,9833,528 Pre-tax Inc.12, % 13, % -10% Net Income11, % 13, % -10% Basic EPS (NT$) All figures in NT$MN except for per share data 4

4Q04 Income Statement – YoY Comparison 4Q044Q03YoY Revenues110, % 90, % 23% Gross Profit5, % 4, % 36% Op. Profit2, % 2, % 35% Non-Op. Inc.-4431,069 Pre-tax Inc.2, % 3, % -25% Net Income2, % 3, % -14% Basic EPS (NT$) All figures in NT$MN except for per share data; numbers are unconsolidated 5

4Q04 Income Statement - QoQ Comparison 4Q043Q04QoQ Revenues110, % 78, % 40% Gross Profit5, % 3, % 60% Op. Profit2, % 1, % 96% Non-Op. Inc.-4431,861 Pre-tax Inc.2, % 3, % -27% Net Income2, % 3, % -6% Basic EPS (NT$) All figures in NT$MN except for per share data; numbers are unconsolidated 6

1Q05 Income Statement – YoY Comparison 1Q051Q04YoY Revenues78, % 65, % 20% Gross Profit4, % 3, % 29% Op. Profit2, % 1, % 67% Non-Op. Inc.-861,757 Pre-tax Inc.2, % 3, % -27% Net Income2, % 3, % -32% Basic EPS (NT$) All figures in NT$MN except for per share data; numbers are unconsolidated 7

1Q054Q04QoQ Revenues78, % 110, % -29% Gross Profit4, % 5, % -17% Op. Profit2, % 2, % -20% Non-Op. Inc Pre-tax Inc.2, % 2, % -6% Net Income2, % 2, % -30% Basic EPS (NT$) All figures in NT$MN except for per share data; numbers are unconsolidated 1Q05 Income Statement – QoQ Comparison 8

1Q054Q041Q04 Net Interest Income Interest Income Interest Expense Investment Income ,338 QDI QSI Others Foreign Exchange Others Total Non-Op. Income ,757 Net Income2,0452,9183,010 All figures in NT$MN; Numbers are unconsolidated Non-Operating Income Breakdown 9

Balance Sheet 1Q054Q041Q04 Cash & ST Investments51,74948,74552,755 A/R55,21945,53437,685 Inventory5,2325,7037,545 Total Assets139,900146,032132,210 Current Liabilities72,25780,17956,096 Total Liabilities72,92580,90666,895 Shareholders’ Equity66,97465,12665,316 All figures in NT$MN; numbers are unconsolidated 10

2005 Shipment Targets E2004AGrowth Notebook PC14-16MN11MN27-45% Handset6-8MN5.1MN18-57% Server K630K27-59% LCD TV K220K82-127%

Near-Term Outlook  NB PC chipset shortage largely alleviated  OEMs eager to roll out new Alviso-based NB PCs  Expect to see sequential increase in NB PC shipments in 2Q05  Handset shipments likely to be flat QoQ in 2Q05  Server business solid  Large size LCD TV shipments picking up – seeing increased interest from OEMs 12

Dividend and Employee Bonus 13 Dividend2004 (To be paid out in 2005) 2003 (Paid out in 2004) CashNT$2.5/shareNT$2.0/share StockNT$0.5/share (50 shares issued for every 1000 shares) NT$1.0/share (100 shares issued for every 1000 shares) Cash Payout Ratio65%47% Employee Bonus CashNT$80MNNT$44MN Stock40MN Shares  Annual General Shareholders’ Meeting: Monday, June 13, 2005

Investor Relations Contact Details Mr. Jason Lin (O) x1609 (F) Thank You