I have replaced my ASUS P5N-E MB with a EVGA 750i MB. The ASUS MB was junk and so the switch. I am running an SLI dual GPU set-up.Core 2 duo. My question is this: I am currently using DDR2 800 (4Gb) but the new board says to use DDR2 1066. My PC is kinda new and I really don't want to have to buy new memory so can I use the 800 or do I have to bite the bullit and buy new 1066 for this MB?