Yes, there are many factors, and in your case I don't know what's the problem. We all agree that you should get much better results with your setup. Now, all I know is that we tried the 66GT in different systems, and the 66GT doesn't perform very well with old P4 (400 or 533 fsb) , like the 2.53 or 2.4. I don't think it's a chipset driver issue... And for some unknown reason, the ATI 9800 Pro seems to outperforms the 66GT in those systems. Why? I don't know... Does the 66GT need more performance from the CPU? Is it a driver optimisation thing? All good questions I don't have answers to. So, getting back to what I said in reply to Pigchild's message that he had poor performance with the 66GT in his system, I said that a friend had the same problem with his setup, which is also a P4 2.53... And that on his system, game performance "sucked".