Help - Unstable system!

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Joined
21 Oct 2009
Posts
5
Hello all!

I'm hoping some of you guys will be able to help me pinpoint my problems, and find a solution to them.

My PC seems to be very unstable whilst playing high demand games. It'll be fine for around ten minutes, and then it'll freeze up.

I assumed heat was the issue, but upon measuring GPU core temps etc, these never reach more than about 80C, with the GPU fans never reaching over about 50% usage, so I've ruled that out.

It's an Antec case (the entire system is from Overclockers, no changes to their spec except for adding an additional case fan), it has 6 120 mm case fans, and 1 200mm case fan.

I have a pair of GTX280 cards running in SLI configuration.

1000W PSU
i7 965 running at 3474.5 Mhz
12 gig of DDR3 RAM
ASUS P6T Deluxe motherboard.

I have a dual boot system, and the problem occurs on both XP and Vista, though seemingly more so on Vista.

I'm at a loss, I really don't know where to look. Any ideas would be much appreciated. Any more info you may need, don't hesitate to ask.

Thanks all :)
 
Thank you for your replies :)

The system is overclocked, but this was done by OCuK themselves, and it's supposed to be stable.

The PSU is a Corsair HX1000W.

GPU temps and fan speeds were checked using GPU-Z, is there a method to overide the fan speed on GTX280 cards?

I'll certainly have a look at the memory, this is one area I have not checked.

Unfortunately, I never get to see a bluescreen, the system freezes and continuously displays the last rendered frame in the game.

I'm experiencing other symptoms that -may- be unrelated - When rebooting, sometimes the monitor stops receiving signal - suggesting graphics cards again, but if you switch the base unit off for ten or so seconds, and switch it on, the signal usually returns.

Never had a problem when cold booting.
 
Yeah, this system came with 6gb, we added an extra 6 gb.

It is 1600 Mhz rated, G-skill Ram modules.

We've tried running 12gig at 1333Mhz, but the problem was still occurring, so we've removed 6 gig, currently still running at 1333Mhz, the problem is still occurring. The system is exactly as it came from OCUK at the moment, bar the addition of a few HDDs.

What's next? 6 gig at 1066? Swap the current 6 gig for the other 6 gig, to make sure we don't have any duff modules?
 
I know exactly what you are saying - But as the system was overclocked by OCUK themselves, and it was stated that it ran in a stable manner, I had no reason not to trust them.

Am now trying 6 gig at 1066 to see if that makes any difference.
 
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