After much trouble shooting and wasting time I finally figured out the problem with my machine. It was a faulty SATA cable that was powering my SSD.
First clue: the miner crashing and the computer restarting to bios. I didn't put two and two together at the time though.
I tried to uninstall the blockchain drivers and reinstall the latest AMD drivers but that turned into a massive clusterfuck of corruption.
Went to format windows and kept getting a bunch of errors. Windows wouldn't reinstall claiming my harddrive was MSR format instead of GPT. Went into diskpart and had a ton of issues getting diskpart to even recognize the drive. Sometimes it would, sometimes it wouldn't. After about 10 tries I finally got it converted to GPT and began installing windows. 1/2 way through there was an error saying the resources weren't available to install, blah blah.
Tried it again and Windows didn't recognize the SSD at all. Back into diskpart, wouldn't find it. Restarted and it popped up, tried to format back to GPT but got an error. By this time I was heavily suspecting a problem with the SSD, thinking it had gone bad. Tried install one more time and got an error. Gave up and was going to order a new SSD. One of my buddies asked if I had tried a different cable and I told him no, it was a new cable and I figured a bad cable would be very unlikely.
Then I remembered it only booting into BIOS after crashing until it was power cycled again. Hmmm... points to hard drive. Then I remembered when I changed to EVGA power supplies I put the SSD on it's own SATA cable, one I hadn't used before. Hmm, well WTF, might as well give it a shot.
Changed cable. Flawless Windows 10 installation. Loaded latest AMD driver, shut down and plugged in all 7 GPU's. Restarted expecting a bunch of problems as I've always faced before. Nope!! Everything came up perfectly... almost too good to be true.
Machine is now mining ITNS coin and has been stable going on 2 hours. Woohoo!