I am having a problem with certain games causing my PC to lock up tighter than a drum.

I suspect that I am having problems with OpenGL games (Half Life, Q3ademo). When I run any of them, they run for about 20 seconds before locking up the PC. Only recourse is to reset or power down.

Games running under Direct3D work great.

System stats:

AMD-K62 500
AOpen AX59Pro MB (latest VIA 4in1 drivers)
250 watt Enlight power supply
128 MB PNY PC100 RAM
eVGA NVidia TNT2 M64 AGP video (Detonator 3 drivers installed)
6.4 and 3.8 Gb hard drives
HP 9140i CD-RW
SB AWE64 sound card
3Com Etherlink III NIC (10Mb)
Windows 98SE


Help!