Overclocking - Gfx Problem

[nheather]

Wasn't sure whether to post in Overclocking or Graphics but decided the problem is more to do with overclocking.

I have the following

aBit IP35
Intel E6750
Crucial Ballistix 2x1GB (1066MHz)
Geforce 8800 GTS

I've been slowly clocking my CPU - not too much and the RAM is actually running under spec.

Problem has been observed at the following

Clock = 370 and 375
RAM = 1.25
Multi = 8

CPU = 2.96 and 3.00
RAM = 925.0 and 937.5

Sometimes the graphics card doesn't start up properly resulting in a black screen. At first I thought the computer hadn't booted but when I powered off\on I got the message that windows hadn't been shut down properly. So I think everything had started up apart from the graphics output.

Now it doesn't do this all the time. And it hadn't done it at all until I reached these speeds.

PCI bus is fixed at 100MHz
Voltages are at default.

Is this coincidence or is it possible that something to do with my overclock could do this? - If so is it that my voltages need increasing - which ones?

Cheers,

Nigel

 

[latercomer2]

Have you read the basic overclocking sticky? I've also just started experimenting and found it pretty good.

I did experience what sounds like a problem when I was just ramping up the clock without changing the voltages so its definitely worth trying upping the Vcore a little and see whether it helps.

 

[nheather]

Yes I have read that and am quite familiar with overclocking.

I wasn't asking about specific CPU, RAM, temperature crashing problems but about the Graphics Card not starting up properly - whether this is a coincidence or could it realted to the overclocking in some way.

BTW when it does start I can play games like Crysis for as long as I want without any problems.

So I didn't think it could be voltage related but will try and see if it makes a difference.

Cheers,

Nigel

 

[latercomer2]

I think its very much related as I've never experienced the problem until I started pushing the FSB and as soon as reverted to the previous Bios settings the problem disappeared.