I got pretty much the same problems with a similar setup, using 2x2Gb Corsair XMS3 1600, Phenom 965 BE. Known good high quality really powerful PSU, SSD, graphics card. I've built a few dozens of computers over the years but this turned out to be one of the harder challenges...
Problem was the "three beep syndrom" right from the start, no sound and no video at all, possibilities to get into bios now and then and a certain time beore freezing... booting into win 7 with random bluescreens after 0 - 5 hours/minutes... horrible. Tried one memory module at the time, looked good for a while then *bam*: back to zero. Tried with onboard video, worked fine for a while then *bam*. Thrown back to stoneage no matter what I did. Newest bios FF, 2.1 board revision.
Latest glimpse of success was after a complete disassembly, reassembly of everything from the processor up, clearing bios, now I got no input from the usb keyboard all of a sudden. So I used an old PS2-connected keyboard instead. Everything worked fine for a few hours, perfect gaming through the pci-e videocard etc. Then a new BSOD, then revert to zero again. Not even the keyboard works anymore. The three beeps again...
This is really getting quite annoying. Wrong: it is ridiculous. No way I'm going to invest another hour in getting this crappy hardware to work. I'm suspecting serious problems with the MB, in my experience I have yet to see a CPU that is faulty so this piece of POS MB is going back to the dealer now ASAP. That is, if nobody has a really good idea how to solve this system builders's nightmare.
It was a *very* long time since I've seen such serious problems with a new build. Maybe I just used to be lucky...