I'm using gpu tweak to overclock my ASUS direct cu II gtx 780, and I have it running at 1280mhz (as high as gpu tweak will go) and 1.125v. After 30 minutes of furmark, it's still under 70C. So I'm wondering if I should get another program that can push the clock even higher (if so which one). Also, is it worth it to overclock the memory? It's currently at 1502mhz, even though gpu tweak says it should be 6008mhz.