YEs, if it's not too late I think I know what the problem is. Your RAM is rated at 800MHz but that's only in single channel mode. It needs to be dropped down to say 667MHz for dual channel. What you need to do is boot with one stick, adjust the RAM speed to 667 in the BIOS, then add the second stick and it'll boot fine. This has been reported for the cheap Patriot RAM sticks from Newegg among others, let me know how you get along.