markwp :
A bad SSD is certainly possible. Sadly, errors of this type can be very tough to pinpoint. I really can't give you any more advice than what you have already tried - it's a matter of trying to weed out each and every possibility.
Yes, it is possible for a m/b to dork a drive - you have to remember that you are dealing with electronic circuits that are typically low voltage and low amperage (at least in the case of sata connectors and your issues) and a random "iffy" part such as an smd resistor or capacitor that is intermittent, a cold solder joint or any of a number of other difficult to diagnose things can drive you nuts.
As an aside, the Sentey psu is a very poorly rated unit. It is possible that the unit is throwing spikes or surges through your 24pin or through one of the other connectors which could cause your problems. Just because your voltages read fine doesn't mean they perform under load - a bad filter cap or choke can send a real spike down the line to your m/b.
I wish I could help to pinpoint the issue, but I'm kind of at the limit of my knowledge here.
Thank you, and I understand. Right now I have a few options:
1) I could take my rig to Fry's and for $70 they can diagnose it and tell me exactly what is wrong
2) I could continue replacing and checking, and replace my motherboard (which may or may not be the issue) which means I could either:
a) RMA it since I still have warranty (it's an MSI 970A-G46) though MSI has a bed rep for RMA's, and wait a month
b) Spend $100 and just buy a higher quality board in general. This board had issues for example I could never overclock (presumably due to the bad architecture, there's also a lot online that it doesn't support too much power into the CPU) and it only has 3/5 stars on NewEgg
So with the second option I'd either have to wait a month or spend $100, and 50/50 chance of it solving the issue or not. Then if it doesn't fix it then it's the SSD or my PSU (sigh)
With the first option I don't fix anything right away, but I get confirmation of what is wrong. What do you reccomend?