UPDATE.
So, I took both drives back this afternoon, sales guy hooked them up to a dock and confirmed they were both not powering on (DOA). Replaced with 2 new ones, I had him hook them up to prove that they were good, which they were. Awesome right.....wrong
Just got home, chucked one in and nothing, doesn't spin up. I'm so lost and confused, nothing anywhere on the net I can find even similar to this.
I have literally tried every combination I can think of, have now attempted to used all 10 molex connectors I have, including ones connected to old hdd's. tried the hotswap bay. Also, tried disconnecting all other peripherals except 1 new hdd. nothing.
Anyone got any ideas, some bios setting i don't know about? something crazy going on like a PSU low power issue? is it possible for the mobo to be bricking the hdd's on first boot? Is there something extra needed wrt NAS drive setup?
Any and all suggestions welcome.
PSU is a Thermaltake evo blue 750w gold plus