Something is not right with your memory, but I can't put my finger on it. I would imagine this is where your problem is due to the fact that it is reading it as single channel and your frequency is low as well. Somebody can probably give you better help with messing with the timings in BIOS, I needed help myself some time ago. I don't want to mess you up.
I can tell you it's under advanced>memory timings / memory frequency. You can go and see where it is.