Hi, I have a new system; specs = 3GzP4, 1.5Gb DDR, WinXP Pro SP2, Mobo is an Asrock with an SIS chipset, Radeon 9800SE 256Mb. The GFX card I have used in another system with the games and it worked fine. Now when I play Sims2, NFSU2, Doom3 they all crash after about 5 minutes. TonyHawkU2 which my daughter plays seems to work fine. I have DX9.0c and dxdiag reports no problems.