Computer freeze while playing games, please help

zerolevel

Junior Member
Aug 24, 2005
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Hello,
I hope it's the right forum

I bought my computer last year (Jan 2005), with newest mid-range hardware i could get.

I got:
Athlon64 3000+ @1809Mhz (no OC) - Winchester
GA-K8NF-9, using F7 BIOS, just noticed there is a update, but i'm not sure that will help.
2GB RAM - DDR 400 - nothing special
Nvidia 6600GT - GV-NX66T128VP - Gigabyte silent heatpipe solution - stock speeds
Audigy 2 ZS
3 HDs, 2 CD/DVD writers
525 HEC PowerOp PS (it gives enough juice)

Nothing Overclocked.

Problem is, that in some games - usually FPS, after ~15 mins of gameplay the picture and sound freeze keyboard not responding, and after about 10-30 seconds the computer reboots itself.
It started happen about 6 months after i bought the computer, but it happened once in a while, so it didn't bother me (was sure it's bad game/drivers), now it happens in almost all FPS games :/
However, it seem to only affect FPS games, in Oblivion (which is probably the heaviest thing ever created) it doesn't happen.
also in Doom3 based engine it never happened.
in Settlers 5 is happened, but that was a driver+game problem, which was solved by downloading updated drivers and waiting on a game patch.
In Battlefield 2 it didn't happen at first, but then started, later. (about a month after i started playing)

Drivers are update regularly.


I ran a memtest32 (ver 3.2), no errors (i let it do 2 complete passes), so i guess it's not the memory.

I suspect the 6600GT, which reaches 118c (!) when it crushes.
I used rthdribl 1.2 to make it freeze outside a game - took about 20 mins from idle temperatures for it to freeze, then after reboot (when temperatures are at about 50-60%) it took about 8-10 mins to freeze again.
Point is, when the card was new, it was stable at 126c, and even higher... and i guess it's stable with these temperatures in Oblivion... so i dunno.
The CPU is cooled by a TT fan and heatsink, not sure which model but it's one of the basic. it's ranging at 30c idle to 50c under load, which should be stable for the CPU.
The 6600GT is at 66c when idle.
I used an external temperature sensor to check if the 6600GT temperature is real, when idle it's external temp is at 40c, and under load i've seen 63-68c, so i guess it's the real temperature at the core (66-120).

no artifacts in gaming picture.

It could also be the Mobo? but i have no idea how to check that.

What should i do?
Any ideas?
Thanks!!

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Few things i found out after searching the forums:
- I had Starforce installed, I have no idea which game put it there, but i download the remove tool, run it, and got a nice BSOD with c0000005 (usually access denied), luckly after the boot SF was gone, so maybe that was the problem. (me hope so)
- I got the CnQ feature of AMD enabled, gonna try to disable it and load the computer again.