Enter to the BIOS and configure all spec of ur RAM manually.
The highest OFFICIAL DDR2 RAM speed is 800MHz. Anything over that requires you to manually set the RAM speed, timings, and voltage settings in the BIOS. That's completely normal. Most motherboards require you to manually set RAM values for RAM rated over the DDR2 standard 1.8v. They have to do that for compatibility reasons.
+1^ for everyone whos posted and thanx about the avatar!
Update: I would try what the above posts say as far as manually setting your RAM speed.
What values do I set it to? What values do I change?
I've set the speed to 1066 and the voltage to 2.08v but I don't know how to set the timings and when I boot it gives me a blue screen.
Tried 2.1v and 2.2v but neither worked. Still don't know what to do to make this work.