I overclocked both gpu's on my 295 GTX from a core clock of 576 ea. to a clock of 702 ea, and the shader clock went up from 1242 to 1511 ea.
Will this O'c give yeild any noticable performance changes and will it increase the heat level that much? At idle the card is at 43 degrees and at load i've gotten to 53. And is it more important to o'c the core and shader clocks or the memory clocks?
it depends on your CPU, when you have core i7 in, decently oced, than you will seen performance boost (in some games more in other less) but if you have dual/quad core (even oced heavily) there will be nothing noticeable ...in most games dual/quad cores are not able to squeeze out GPU at stock