Have you got an aftermarket CPU cooler ?
Have the same setup cept my ram is 1066mhz, im running abot 1mhz under 3.2GHz. Had some silly problems getting it to boot with 4gb of ram tho. The ram would not run at 1066mhz at 3.2 GHz, was running at something likle 1033 or something, took the cpu down about 1mhz and it was fine, ram is at 1066mhz and the cpu is running at like 3.199ghz lol. 9x multiplier tho and 4 sticks of 1GB, EVGA 680i motherboard.
I cant run more than 3.3GHz stable and even then i dont trust it so im running it at 3.2GHz.
Your setup souns fine to me. Personally i would use the 9X multiplier but others will tell you to use 8x. Dont think it makes much of a difference tbh.