Random black screens - whats causing them?

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Joined
29 Nov 2007
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43
Hi,

I've had my new build now for nearly 3 weeks, and until now it's been running just fine. However, a few days ago I started getting this thing where the monitor goes all black for a second then immediately comes back. It's been occasional and irregular, and has probably happened about 7-8 times in the past 3-4 days or so. Apart from this my rig has been fine and has been running TF2 and the CoD4 demo superbly.

I've got an 8800 GT and a Q6600 running on Vista 64 bit, and i have downloaded all the latest drivers for my graphics, sound and motherboard chipset, and nothing is overclocked. Two of these black screens have occurred when I was just browsing the web and the temps on the card are fine, so I assumed it was a monitor problem. However after swapping round my monitor and cables round with my brother's the problem is still there. I reseated the graphics card in the slot just to be sure it's nice and snug in there but have still got a few blackouts. My power supply is a corsair HX 620W modular power supply, so i'm sure I've got enough power.

Anyone have any ideas as to what the problem is? It could be a bad card but apart from this my games all run superbly and the problem has only started recently, so I'm really quite confused. Any help would be much appreciated.
 
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Well I hope it's just a driver problem, and if so that would explain why it's only started happening just recently if a Vista update messed things up. I'll try downloading the 169.28 beta drivers then and see if that improves things. Is it also worth re-downloading directX?
 
Well I've just remembered that when installing th CoD4 demo it asked me to reinstall directx, and I certainly didn't have any problems before then and they may very well have started shortly after. I'm redownloading directx now just in case.
 
After reformatting my computer and only using the drivers I was originally using, it's still happening. Any ideas?
 
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