Trying to run 4x2gb and the black dimm slots wont post at timings tighter than 8-9-8-28-2T no matter what voltage. Also not stable at 1T nor 21.33x again no matter what voltage. 100% stable @ 8-9-8-28-2T 1866mhz 1.425vdimm everything else stock. Same sticks run 2133mhz 7-10-7-28-1T @ 1.575v using only blue slots. Tried bios 1502, 1606 and 1850.

Have tried to run 4x2gb BBSE (eco c7), 2x4gb hypers (no go above 1866mhz, MGH and MNH) and 4x2gb PSC (G.skill CL6-12800-XH). BBSE is poor, Hypers just dont work and the PSC is great in 4gb but 4 slots populated is just rubbish.

Also since flashing to 1850 I can no longer run over 102.2bclk stable. Used to run fine at 105.5. Have flashed back and forward several times to try and fix it, but it wont even post over 103.5 now? I detest this board .

Anyone have any suggestions before I try to RMA the board?