Your problem is most certainly RAM related. You picked RAM that isn't designed to run with your system. The current Intel chips only support RAM voltages up to 1.65v without damaging the onboard RAM controller. You should set the RAM to 1.65v, loosen the timings a bit, and hope for the best. I don't suppose you have the option of returning that OCZ RAM for a better kit that runs at or below 1.65v do you?
By the way, you don't have to be able to boot into Windows to run Memtest86+. You go to www.memtest.org and download an ISO image. You then burn the ISO image to a bootable CD and boot the system from the CD. The test starts automatically and runs outside of the OS.