what are u trying to achieve out of your i5 750, as in what speeds? i can go on my i5 750 at 3.45ghz without a Voltage Increase, u should be able to flash ur bios in case anything messes up, turn off cpu spread spectrum, load line calibration, all the power saving options - Intel SpeedStep, Turbo Boost, C1E, and there should be a few others i cant think atm, but u should easily be able to oc it, what kind of board do u have? i have mine overclocked on a asus p55dle board, imo asus are great for oc just about anything, 1 more tip, if ur pc wont boot at that speed, 9 out of 10 the problem could be the ram timings are too low for the higher clock, well i noticed that with my board, i had 7-7-7-20 @ 1333mhz and @2.67ghz on the i5 stock, overclocked i have 1600mhz@9-9-9-24 and @ 3.3ghz = http://i357.photobucket.com/albums/oo15/skater44_04/cpuzz-1.jpghttp://i357.photobucket.com/albums/oo15/skater44_04/ram.jpg
and it even works with 1T command rate on ram timing!!!
, any other questions u can ask me man im a i5 guy ><