I know this is an old and nearly dead thread, buuut....onza, I'm running Kingston Hyper X 3500 275fsb at 4/5 ratio (meaning 220 for the RAM) with absolutely rock solid stability. I like this stuff 'cuz I got it cheap ($69 for a 256MB stick) and it gives me the room I need to clock pretty well during the hot summer when OCing is limited anyways due to ambient temps. Plus I wanted to save my $$ for later this summer of early fall when we begin to see lots of high quality low latency RAM that does ~250MHz and up at 2-2-2-5. Otherwise, I woulda gone for the Hardcorecooling CH-5 based RAM or the Winbond CH-5/CH-6 sticks.