When I run the GTS450 solo, it gets 9200ppd in either slot. When paired with a GTX460, it drops to 7900 regardless of how much I overclock. Gotta be a PCI conflict somewhere. When I ran the GTS450 with 3x GTX460's, all hell broke loose in Afterburner with fans and clocks all over the place. In the infamous words of Dexter Holland of "The Offspring"...."Gotta keep em' separated"