bsod, need help.

[chipsas]

Hi there. I'm new in this forum, but i need help. Im using p4 1.6k ghz dual core geforce 8500gt, 240gb hard, 1024 ram. Pc keeps restarting after ~3-4 hours. Event viewer shows this : Error code 1000007f, parameter1 00000008, parameter2 f7ac7d70, parameter3 00000000, parameter4 00000000.

Error code 1000008e, parameter1 c0000005, parameter2 bfb0b179, parameter3 b277baa8, parameter4 00000000.

I attached minidumps.