Well after a little work, I got both up and running again. Not sure if this might help anyone in the future, but I will post what I did.

One one : I simply just reset BIOS and everything was fine.

The other : I started up w/ only one stick of RAM to make sure one didn't die on me, and I wound up just switching the RAM into the opposite slots. It wound up starting up fine. Looks like on this one, I didn't have one properly seated.