I've always used ATItool to test stability of my cards / overclocks, and this new 260 GTX I've had for the past week or so confuses me a little.. when I run ATItool, even at stock clocks I get "delta of 284 in 2 pixels" sometimes and sometimes I don't. The thing is that it runs pretty much every game I throw at it flawlessly, no artifacts as ATItool says it has. Think it could be the 180.43 beta drivers doing it?