Didn't test it higher than 505Mhz yesterday. I think wall should be at 510-513mhz - was not able to run it @510mhz yestreday but I voltages were not maxed out yet. 476mhz air limit.
Oh rly?) gtx295 is 2gpu card and the result is done with one card only (gpuz says 2 gpu active).
Last but important one is that XP is unable to run quadSLI.
The result must go to 1x GTX295
I'm dead sure to use 125+ pcie 3D benchable with Abit IP35-E and random 7900GS. You just need a card that does not use pcie clock as a reference for mem/gpu (there were some GF9600 and others that were overclocking with pcie).