well overclocking is much safer and stable in the bios, but then again if your mobo's bios wont allow manual voltage increases then i guess you could find one that is kinda decent, though i thought oc software was used specifically for the mobo that they come with? And, 1.35v for 3.75Ghz is pretty decent, but i have seen a lot of e5200's git 4.0Ghz on around 1.4v.