@SMAK switched to 5,1 for funsies and will try geekbench on 3,1. Did you run a 32bit or 64bit? I will definitely be trying back to 3,1 if it is OC better. I think I will be able to RMA out my board this weekend so should be able to know right away if its a memory problem associated with my defective board. And even if its not directly, Ill be able to make the necessary changes finally to get to a fix without having to find out if its a thunderbolt or RLC causing a reboot. I have a coolermaster II case and H110i GT watercooler. I might try that program you mentioned. The system runs very at cool at 40oC and about 60-70oC on the cores when OC to 4.47 GHz at 100 strap. I haven't looked at the TitanX temps, but they,re certainly hot enough to make you sweat when your face is at the back of the system. I REALLY need to sit down and change my fan settings though, because I swear it isnt automatically adjusting. Always going full blast and pretty annoying. Ill let you know if the new board helps me overcome the last of my intermittent issues on the thunderboltexii. Good luck in the mean time!