TR3X6G1600C8D running single channel only

Hello all,

 

I just built this system and I can not get the RAM to do anything but run in single channel using only 2 sticks.

(sticks are in A1 and A2 slots, first black and orange set closest to the CPU)It does show up as running at 1600 though.

 

If I try to add the third stick in any other slot but the next one in line (B2) it will not post at all. No beep, no nothing.

I have tried adding that third stick in all the other slots, but get nothing. When I add it to the third slot, it will post, but it only shows up as having 4GB installed.

 

I have tried following the advice here:

http://forum.corsair.com/forums/showthread.php?t=76698

and here:

http://forum.corsair.com/forums/showthread.php?t=78614

 

I have also tried different settings, such as XMP on/off, with and without extra modifications, total manual settings and total "auto" settings and just about everything in between.

 

I have tested each stick individually and as sets of two using the newest Memtest 86+, and they all pass with flying colors.

 

I am not totaly computer stupid, but I have been out of the scene for a while so maybe technology has passed me by. But I just can not seem to get this RAM working.

 

I would be extremely happy if I could just get this RAM to run at 1333 speeds in triple channel mode like Raubritter did in his post.(the second one listed above) But I can not get this thing to do anything but run in single channel.

 

Can ANYONE give me any advice or direction??

 

Any help would be greatly appreciated.

 

Thanks in advance.

Start off by using the correct slots as per the manual, the orange ones.

I did start off with the orange slots. And many times throughout my testing I have gone back to using the orange slots. Both with 2 dimms and with all three.

 

Anyone else have any ideas??

I found someone was having same issue, can't run dual channel, reseating the CPU solved it, also make sure no bent pins in the motherboard