No BSOD just a complete lock up

Been having an issue lately that I can't quite seem to nail down, so I turn to the community for help.

Recently swapped out my MSI P6N Diamond Mobo for a Gigabyte EP45-UD3P because I was having all kinds of memory issues. I've had it running fine for the past few weeks. 2 days ago I added my third 1TB WD Caviar Black drive and another 2 GB of memory when the computer started hanging, screens stay active but the system is dead and have to do a hard reboot. Disconnected the SATA cable only from the drive and removed the new RAM same issue. Memory passes memtest. Boot into safe mode, don't have any issues, so I figured it was a software issue. Backed up my files and reinstalled windows. Upon booting back up the problem was still present. Comfortable with my RAM being fine I disconnected the power from 2 hard drives (the new one and the smaller one that I don't use too often) and the issues went away. Reconnected these drives on a different rail and the problems were still gone, but after a day they've started to reemerge, but not as bad as they were.

Would 3 SATA drives really tax the rail that much that I'm freezing the system? It doesn't make sense to me.

All of my drivers are up to date to my knowledge.

edit - added a file

Another detail of note since this issue is back to craptastic, 3 lock ups in the past half hour, is that when the screens lock I can still hear the hard drive working for a few seconds, but the indicator light remains out.

Been playing around some more and checking the drivers, it looks like the drivers for most of my motherboard devices are the default MS ones. I ran the driver install from gigabyte and the MS drivers remain there. Ideas?