GA-P35-DS3L memory timing in BIOS

I'm having some problems with my Crucial Ballistix after some overclocking (not extreme). After getting Crucial on the phone, they said this RAM needs to be tweaked to run properly because motherboards generally don't supply enough voltage when on Auto and the timings are automatically set to 5-5-5-18 instead of 4-4-4-12. I went into the BIOS, but can't find any way to set the timings. There is some kind of Option 1 or Option 2 thing you can change, but it doesn't say what timings it gives. Am I missing something here? Where can I just plug in the timings I want? Honestly, I think when I change the timings it will get worse, not better, but should at least be ABLE to change them when I want.