I have a shuttle case 'Xpc' SN85G4 V3
FN 85 Motherboard
Athlon 3400 +
Socket 754
Current problem. When gaming the fan seems to kick into gear and stay on for long periods of time. Most of the time the computer just locks and I have to reboot. BUT if I remove the shuttle case cover it seems to run fine even if the fan does stay on quite a lot. Is there some kind of temperature limit that I can adjust and where or are there any other reasons for it.
Thanks
Eddie