Blue screen on brand new build

I built this machine 2 weeks ago, runs great except it has crashed 5 times while gaming. I get a blue screen:

Stop 0x000000F4
0x0000000000000003

0xFFFFFA800A45BF30
0xFFFFFA800A45BE10
0xFFFFF80003192F40

It then will not boot because BIOS no longer sees my two Adata S510 SSD drives hooked to the Intel Sata3 controller (one is Win7, other has game). The SSD drives do not appear on the booting screen or inside the BIOS. It does still see my WD disk drive on the Marvel Sata3 controller. If I cycle power or reset, the SSD drives are again visible and it boots fine.

GIGABYTE GA-Z68X-UD3H-B3
Intel 2600K
Windows 7 Home Premium 64 (OEM from NewEgg, new)
PSU is Corsair CMPSU-750HX 750w RT
8GB Gkill 8G F3-12800CL8D-8GBXM
VGA-XFX HD-687-ZDBC HD6870 1G

Brand new home-built from NewEgg parts, original OS install. default settings/no overclock (other than slight GPU factory OC).
Runs cool. Usually takes a few hours of gaming before it crashes. I have run Carrona memtest 86 V4.20 and Prime95 w/o crashing or errors. Windows doesn't seem to be generating a minidump file.

Thank you for any advice you may have,
Bob