IF you've got 2 sticks of RAM, are they plugged into the proper slots? Check the color coding. If you're using double sided (x16) RAM thats a definite no-no. Have you made sure your DRAM freq. is set to 533 in BIOS? There are also a couple of PCIe frequency settings in your BIOS that might need to be adjusted. I'm betting that the problem is somewhere in the BIOS settings on this one....
Al
It isn't paranoia when you KNOW they're out to get you...