Re: 6600 Gaming problem :-(
Well, if it isn't the drivers, and you are certain that it isn't the psu- I can think of one thing.
I am not at all familiar with the board you are running. It is evidently socket A. But what I'm wondering is, does it support AGP4 or 8x? Though I think if you're running a 1300 it should be atleast 4x, if it doesn't support either AGP4x or 8x, then that COULD be the problem. I don't think anything newer than the GF4s can run fine on AGP 2x without some sort of problems.
Kind of a far fetched answer, I know, but it is better than nothing. So, do you know if your mobo supports atleast AGP4x?