Bumping with an update.
Was checking things earlier today and to my surprise, my PC is suddenly missing 4GB of ram and not running in Quad Channel mode anymore.
After swapping some sticks around, it turns out my nice Asus motherboard has a dead DIMM slot. Right out of the blue I guess it just up and stopped working. So I'm stuck running basic 12GB for the time being.
I would consider sending the board in but I keep hearing bad things about Asus's handling of RMAs. Not to mention the fact that I'm pretty broke ATM. Merry Christmas to me, I guess. At least running 12GB isn't terrible, it's still fairly quick. It's just not running as quickly as it could be. I mean hell I didn't even notice a difference in performance, and wouldn't have known there was an issue until I checked the readouts.
The worst part is it's the first channel slot so I can't even sacrifice some extra ram for dual channel capability. Oh well. Might just stick with it and get a totally different board sometime down the road.