@msinfo_us and fq360, I would also like to see if native pm works with the newer bios version and the 6 core chip. I've switched to an ASUS P6T WS for now, but my EVGA E767 still hasn't sold on craigslist. It might also be interesting to compare a raw dsdt dump with a 6 core cpu vs one from 4 core cpu on the same board and bios version and see if anything is different that might be causing the issue. Then perhaps the dsdt could be modded to make native pm work on the 4 core as well using a newer bios version, but I have my doubts.