Ok I did a little tinkering around and got my core up to 815mhz and my shaders are up to 1630. I moved a case fan in front of my card so I get a little more air moving across, it, temps dont go above 70c and fan doesn't go above 70%. My memory is still at 1800 though, if I change my memory speed at all I get mad artifacts and instability. Could this be due to the fact that my PNY card has no heatsink on the memory modules? Also, I bumped my voltages up to 987 (from 975) any advice/help?