ATI Radeon 9550 / X1050 Series crash

Bonjour,
J'ai une carte graphic ATI Radeon 9550 / X1050 Series.
Des que je lance un jeux style NBA live 07 ou PES6, mon pc reboot.
A l'aide please,
Merci D'avance

System Information
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Time of this report: 9/10/2008, 21:06:04
Machine name: IBROMADA-91F927
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_rtm.040803-2158)
Language: French (Regional Setting: French)
System Manufacturer: ASUSTeK COMPUTER INC.
System Model: P4U800-X
BIOS: Phoenix - Award BIOS v6.00PG
Processor: Intel(R) Pentium(R) 4 CPU 3.00GHz (2 CPUs)
Memory: 512MB RAM
Page File: 247MB used, 1002MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.2180 32bit Unicode
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Display Devices
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Card name: ATI Radeon 9550 / X1050 Series
Manufacturer: ATI Technologies Inc.
Chip type: ATI Radeon Graphics Processor AGP (0x4153)
DAC type: Internal DAC(400MHz)
Device Key: Enum\PCI\VEN_1002&DEV_4153&SUBSYS_010C1043&REV_00
Display Memory: 256.0 MB
Current Mode: 1024 x 768 (32 bit) (60Hz)
Monitor: Écran Plug-and-Play
Monitor Max Res: 1600,1200
Driver Name: ati2dvag.dll
Driver Version: 6.14.0010.6822 (English)
DDI Version: 9 (or higher)
Driver Attributes: Final Retail