Lock-ups w/a MSI K8N Neo2 Platinum

[Grit]

I've got a MSI K8N Neo2 Platinum and an Athlon 64 FX-55 running Windows XP SP2, 1GB RAM (2.0 2-2-5) any typically have no problems. However, when I resume from the suspend to RAM function AND play a video game (only tested HL & HL-2), the game locks up within the first 15 minutes, crashes back to the desktop, and gives a memory addressing error. Rebooting the system seems to take care of the issue.

I would like to be able to fix this problem so I can use suspend to RAM (S3 powersaving mode). Any suggestions would be appreciated.

Thanks.