It turns on, thinks for a second, then dies abruptly. The CPU fan spins, HD powers on, everything seems to be working. I think the problem lies with a incompatibility between the CPU's FSB not matching the RAM. If I understand correctly, if I install DDR3 1066 temporarily and then change the multiplier I can speed up the FSB to match 1600 mhz and put back in the Corsair RAM.
No, that only means as time goes on the thermal performance of the paste will improve until it is fully set. I'd double check all the connections, reset the CMOS, and go through the checklist posted a few posts up.