This is a good one. ASUS M4A88T-M/USB3, 965BE W/Hyper TX-3 cooler, MSI HAWK HD6870, OCZ 650 PSU, 2X 2GB GSkill 1866 @ auto-detect 1600. Will not run in dual channel mode. First got crashes. Now It will not boot with the RAM in the blue or black slots. Any MEM OK light stays on. Pushing the button does not work. System is stable with one stick in the first black slot and the other in the first blue slot. This is single channel mode. RAM passed Windows mem diag extended test.
Is the ram on the approved vendor's list for the mobo?
No, but IMHO these days it really doesn't matter. RAM is RAM and there's just no way a motherboard maker can test every RAM module made by every supplier. Besides that, the system was built in late 2010 and just started acting up.