I have 4x1GB DDR2-6400 Crucial Ballistix RAM modules. If I only use 2x1GB at a time, everything works fine, but when I add all of them to the system, it will hang at the BIOS loading screen or Windows will BSOD immediately after boot with IRQL_NOT_LESS_OR_EQUAL. Originally I thought one of the modules was bad, so after verifying one set of 2 was working, I swapped for the other set, and they worked fine as well, but add all 4, and it no longer works. System specs are in sig. Any ideas?