I want to set multi to 6.5x and the FSB to 533. That way I'd get about 3.4Ghz cpu speed, 1066mhz RAM @ 5-5-5-15 (will reduce later), and a 1:1 ratio. I got 1066RAM and i'm just trying to get what i paid for lol. but this would mean a 2132 FSB and I'm not sure if the mobo can support it.
would this work, or should i just stick to underclocking my RAM with 8.5x400, 800mhz RAM @ 4-4-4-12.
X38/x48/p45 runs at 1600mhz fsb natively, and reliably ocs to 2000mhz. 2000+ is definitely doable, but can be shaky. You should just downclock ram to 800 and tightening timings, which should improve performance enough to offset most of the part that is lost by downclocking.
Rampage Formula can also get 600fsb on air. There's nothing so special about getting uber FSB. There are more things to performance than just the fsb, memory performance being one of them. With DDR3 being optimized for a 1:2 divider this puts this whole craze over P45s into question. There are P45 boards that sell for the same price as X48s and that's just madness.