Ive tried changing the timings to the right ones which are 8-8-8-24, and I ran memtest using slots 1,3, and 2,4 , and even with them in dual channell mode in slots 1 and 2, and I still getting a bunch of errors. When I tried last night with them in dual channel mode, Memtest stopped running once I hit 64 errors. I looked under the voltage section in the BIOS and the lowest I think it went to was like 1.6v. Today I'm gonna try the sticks individually unless I can fix the problem by changing the voltage. If only one stick is bad, can I send it back and keep the good one?