Thank you Celemine, I understand.
Previous I want to do this 3,3V direct voltage mod because I don't want to let my PSU's 3,3V rail USELESS and don't want to stress to much my 5V rail, beacuse my 5V rail is already very stressed by my hungry Video Card, an ATi Radeon 9800 PRO All-in-Wonder. Unfortunately this Video card, expecially when is extreme overvolted and overclocked at 472/796 like mine, eat a lot of watts from 5V rail :|
But my PSU is not a weak PSU: It's a Thermaltake buttefly purepower 480W.
Do you know how much Watts or ampere a memory like my BH-5 should eat? (approximately).
I use 768Mb of total BH-5 based RAM, 1x 512mb of corsair PC3500 and 1x 256Mb of Mushkin Level2.