Asus X99-M WS, 5930K, 32GB G SKill Value 2133 (4x8), built almost a year ago. So my PC has acted up a little this week (game crashed, memory error when restarting, and BSOD last night). So I decided to boot into memtest86. It froze after 7 secs... So I took 3 sticks out and left 1 in slot B1. Booted memtest86, same result. Installed a different stick into D1, booted memtest86, same result. Tried a different stick, same result. So then I reinstalled all 4 sticks and thought maybe I didnt create the bootable USB drive properly. Went back to bios, only detects one RAM in D1. Took all the RAM out except B1, and it detects it. Put the other 3 sticks in and still only one stick in B1 showing. Grabbed the 32GB out of my z170 build and installed all 4 sricks on it, same result, only B1 (which is the slut to only install 1 stick in if you only run one stick. It seems that no matter which stick I use of where I put it, the PC can only detect 1 stick. Any idea? Is my mobo bad?