Computer Freezes in 3d mode

[Corporate Thug]

Everytime I play something for more than 5 minutes, my system hard freezes. I'm forced to physically power down.

What could it be?

I know it's not gpu temps, max is 90C
CPU temps are good.
Power supply is a PC POWER 510W

Video Card is a 4870. OS: Win 7 RC

EDIT: Ran memtest w/ no errors.

 

[BD231]

Gotta be that OC, how's your luck with Prime95?

 

[Corporate Thug]

Gotta be that OC, how's your luck with Prime95?

Forgot to mention, all settings were returned to default after it started acting up, so it can't be that.

Also, now I'm getting 2d freezes as well (albeit far more sporadically).

 

[Pantlegz]

I had an issue kind of like this a while back, but for some reason it was 2d bitmaps that would cause it to hard lock. try running dxdiag and see if it still happens, if not maybe try something like atitool artifact finder. If either of those cause it to lock, I would place the blame on the gpu. if not, try running prime again with stock settings, if it hard locks it's a little more vague but I would vote for cpu, then mobo... you could try both large and small fft, if it crashes more/faster with large that would indicate a ram issue. Or you could try to run memtest it's quick and fairly painless, I think vista and 7 both have one built in just press F8 while it's booting should be an option there.

 

[Corporate Thug]

I had an issue kind of like this a while back, but for some reason it was 2d bitmaps that would cause it to hard lock. try running dxdiag and see if it still happens, if not maybe try something like atitool artifact finder. If either of those cause it to lock, I would place the blame on the gpu. if not, try running prime again with stock settings, if it hard locks it's a little more vague but I would vote for cpu, then mobo... you could try both large and small fft, if it crashes more/faster with large that would indicate a ram issue. Or you could try to run memtest it's quick and fairly painless, I think vista and 7 both have one built in just press F8 while it's booting should be an option there.

thanks for the reply.

All settings are at default and prime in 12 hours stable. I'll try dxdiag and see what that comes up with.