Athlon XP Overheating?

After about 30 minutes of gaming, my system will freeze. Sometimes for only a minute, and other times it will freeze completely. I have over ten fans in the case including a volcano 9 for the CPU and a thermaltake cooler for the video card. FSB is correct and voltages are set to “auto”.

Here’s my system:
MSI KT-3 Ultra2, Athlon XP 2000, 384 DDR, 80gig hdd, G4 TI4600.