Galaxy GTX 670 Constant crashes

[AHardDayAtWork]

Alright, I custom built my own computer about 6 months ago, My GTX worked fine for about a week. Started crashing randomly with kernel errors and freezes on any game start up. so lately I've been living off my laptop. In the past months, I've brought it back to Tiger Direct for a refund, they wouldn't take it back and exchange it. I have emailed galaxy back and fourth for an exchange, they give me the same runaround every time, Whats your specs, then that's it. I never get any emails back. When I call them, I'm on hold for hours and eventually have to go do something so I can no longer be on hold.

Here's what I've done so far to try and fix it:
Re installed drivers (many times)
Tried all driver versions out
Ran driver installation as Admin
Reformatted my HDD and fresh installed everything

Specs:
Ram: 16gb 2133
CPU: I-7 Sandy bridge LGA 2011 3.4Gz
Motherboard: Asus Rampage Extreme IV
Power Supply: 1050W Modular
HDD: 2 500gb raided; 120gb SSD
Cooling: Corsair Hydro Series H80
GPU: Galaxy GeForce GTX 670

Please help!

 

[popatim]

Reset cmos to rule out any bad settings & overclocks.
get 1333mhz/1.5v ram to test with.
monitor temps and voltages. You didnt say which PSU you have. I hope its a quality one and not garbage.
Update SSD firmware.
Surface scan HHD's. Back up your data naturally.