So I put this build together last night and it booted up and everything seemed fine(haven't installed an OS yet) with the exception that the BIOS was only detecting 4GB of RAM, while I have 6GB installed.
The motherboard's manual says I can use one stick in A1/B1/C1 to boot. I have tried every stick of RAM in the C1 slot, and they all detect fine by the BIOS as 2 GB. I did the same experiment in the B1 slot, worked. One stick in C1, one in B1 -- 4GB detected, cool.
I tried booting with just one stick in the A1 slot... no display whatsoever.
So it's looking to me like my A1 slot is dead.
I read around that other people have this issue with this motherboard. Some people said it can be caused by a short. I'm worried that the Hyper 212 might be shorting the motherboard. The backplate had insulating tape on it that seemed okay, but are the front standoffs non-conductive metal? They're directly on the motherboard with no tape/film on them.
I also had trouble installing the Hyper 212 in the HAF 922 case without removing the motherboard, because the hole in the back of the motherboard tray was too small to fit the backplate. I don't think this should cause an issue, the backplate is not touching the case(barely, but it shouldn't matter because the backplate shouldn't be running any electricity anyways).
Any ideas? I got the P6X58D Premium open box from Newegg so I think I'm screwed on that front
I meant to try your advice but after reading some other forums I saw that a bent CPU pin is often the cause of this... so I got a little over eager
I look at the board really closely with a flashlight and sure enough a pin was bent out of place. I used a needle to put it back in line and everything's groovy now in the A1,B1,C1 slots and I get all 6 gigs recognized at 1600 mhz