GA-X58A-UD3R Memory problem

[kilroy2963]

Hi everyone, need a bit of help with a new build I put together. I have the GA-X58A-UD3R with the Intel I7 950. At 1st I had 6 GB of Patriot memory, Viper2 Sector 7 series, and the system would not work with all 3 sticks. I couldn't even install Windows until I removed 2 of the sticks. With 1 stick in DDR3_1, the system runs fine. Once I add the sticks to DDR3__3 and DDR3_5 it the system will not boot into windows, it just restarts or just hangs at post.
So I decided to return the Patriot ram and try Corsair XMS3, basically the same problems as above, only 1 stick will work. I tried upping the voltage, changing memory timings with no luck, so at this point Im pretty much stuck. So any ideas will be appreciated!!

[bubbl3]

Be sure you are using the white slots and not the blue ones.

[Dark Mantis]

Hi

Have you checked against Corsair's QVL on their website that the memory is compatible with this board?

Did you buy it as a matched kit?

Are you overclocking at all?

What hardware are you running?  Makes/models please.