What about the Q9550? If it shows the Q9550 as compatible, the Q9650 should be.
The green font is the link to XFX 780i's compatible CPUs, it shows the 780i is compatible with the QX6850, QX9650, QX6800, QX6800, and a few others, but not the Q9650 or the Q9550, that's why I suggested redend
look for a BIOS update. He said his board would not POST with the Q9650.
Since he has a $300 CPU, he may want to get a BIOS update, if available, or buy a compatible motherboard. Or sell the Q9650..................