I went for a modest overclock on my new BFG TECH GTX 260OC. Downloaded riva tuner 2.1 and set my core clock to 650mhz. Shader clock to 1400mhz and memory clock to 1200mhz. Could have gone up to 1230mhz on memory clock, locks up at 1238 so deceided to chance damaging my new toy and backed it down. So far I am really impressed with the performance of this beast. All my games run smoothly at max settings, except crysis of course. Run that at high not very high settings and works very nicely. Hope this helps others, my card overclocks nicely for that little boost in performance. I am using my old card an 8800 GTX for my physics X program and it has worked well.