ATI x1950pro texture artifact problem

i have x1950pro pci-x and i get bad splat at company of heroes.
http://www.sinker.co.uk/coh/BadSplat.JPG
i have 1gb ram. before playing i turn off firewall, antivirus and everything i dont need. then i dont get bad splat anymore.

I did buy it from a local store, so I could just do a clean exchange. I doubt this makes a difference, but if I try and overclock the videocard's memory by 1mhz, my system completely crashes (The store I bought my videocard from doesn't need to know ). I can overclock the core ~40mhz before getting artifacts. Like I said, I ran ATI Tool, no artifacts came up. I did have a 7800gs in my motherboard before, but, obviously, it's AGP, and my current card is PCIE, so I have no idea if it's my motherboard or not since I'm not comparing the cards in the same circumstance. I will be upgrading to a new motherboard soon, hopefully (P5N-E). I'm guessing the best advice is to get my new board, and see if the problem persists, but I have to make sure I'm still able to return this card if things don't work out. Do you think the screens in FEAR could be caused by the same issue? I haven't formatted since my new videocard, could that be the cause? Hmm, I do have a Vista installed on a partition, I'll try it in Vista and see if I get the same problem, I'll get back to you guys soon.

okay i just tested both games on max settings for an hour each and so far i havnt seen any problems.

But just to be sure, try the 6.12 drivers or the 7.1 omega drivers (thats what i use)