OK, So I got my new UD3R, thinking my other one was screwed up. If you can remember, for some reason my motherboard will not run 2 sticks of ram no matter what size. So I bought a new mobo since newegg would not replace and gigabyte still has not sent me any kind of RMA confirmation for the mobo. Anywho, fast forward to today. I got the motherboard, rev 1.1(interesting the NB/Sb coolers are a bit different in finish and sizes then from rev 1.0) so i reinstalled with new motherboard. Well, this one won't run with 2 modules either. Also, once I installed it, it would hang as soon as my desktop came up. So i grabbed a spare HDD and installed Windows fresh. No more hang but I still can only run one module. If I put 2 modules in it won't even get to bios.
Does anyone have any clue what this may be from? I am thinking maybe a PSu issue, as my HX520 is almost 2 yrs old now, but for the past 3 weeks, I have been running at 471x8.5 with no issues, except the ram issue. I am so puzzled right now. I have 5 different sets of ram that I have tested with all the same effect...1 stick=mobo runs, 2 sticks= mobo won't post even to bios.