Just got my GTX260 today and I'm having some trouble OCing it. First off, it looks like I can't really unlink the core and shaders. I get a little play room, but it looks like I'm being limited by the shaders. They won't even do 1465, which links the core to 667, but I think the core has more to go... Secondly, the testing is kind of weird. I don't really get errors (using the OCCT GPU test), it just craps out. The test just... stops running. I hit esc, and my clocks are locked to 2D values. I have to reboot to set everything straight again. Is this normal for a GTX260?