x1650 problem yellow chessbord patterns :(

Hi i recently bought a new system:

P5W DH Deluxe
e6600 cpu
4gb OCZ DDR 800
Saphire Ati x1650

I was having a go at overclocking and managed to get my cpu up to 3.6 but was running very unstable. But at the same time in my lack of knowledge I set the pci-e speed up to 110. My computer would run but when i ran 3dmark it would hang after 2 or 3 of the tests. The Cpu temp didnt get any higher than 45c and the mobo never higher than 48c.

Ok so after a big crash that i could not recover from, I reset the bois to default. Now when i get into windows after a few minutes I get this yellow chessbored like pattern either across the whole screen or just parts of it. After a few momnets of that the screen just goes blank but the pc does not reset its as if the monitor has just lost the signal.

So a foolish mistake on my part guess have to learn the hard way. But is it just the x1650 that I have damaged or could it even be the mobo thats controlling it thats been knackered.

I'm going to try and get a replacement pci-e card to see but i cant get to town for a couple of days so I won't know untill then. But if there is any one who has seen this sort of thing before could you please drop me a reply to tell me how stupid I am and tell me which of the two is most likley in need of replacement.

Thanks for looking

JohnyT

So when you changed the card every thing was ok? no damage to the mobo?

Mine is like that just yellow and the pattern is more square I just hope its just the GFX card :?

Cool sounds reassuring every thing in the bios is at default settings and the system stays stable untill i get that chessbord pattern on the screen. It was only gonna carry me over untill the DX10 ATI cards become available. But i certainly learned my lesson about getting greedy over overclocking power. If all is well when i get a replacement card i might just keep it at 3ghz and touvh nothing else!!!!!!

Thanks for your replys so far guys you been great