Random freeze and lock

[frozeninferno]

I am hoping that I am posting this in the right area, I couldn't think of where else to post this.
Anyway, I recently have been having issues with my computer freezing and completely locking up. It seems as if it only does it while I am playing a game on the computer, and isn't just one game that causes it. It flashes the screens then they go "blank" sometimes they all just display solid blue, one time last night, the outer two displayed blue (different shades) and the middle displayed a gray ish color.

The set up is:
M5A97 R2.0
AMD FX 6100
2 x Visiontek 270X running crossfire
2 x 1TB HDD (7200rpm)
1 x 250GB Samsung SSD
CS850M PSU
2 x 4GB unbranded DDR3 RAM 1600

Any help would be greatly appreciated as I don't even know where to start looking for issues on this. And of course if any extra Information has been left out that I didn't think about I can always let you know.

 

[Dangman]

I'd look at the video cards first: Physically remove that second card and try gaming with just the one card. If no issue, then swap the second in and remove the first card. See if there's issues then.

 

[frozeninferno]

I'd look at the video cards first: Physically remove that second card and try gaming with just the one card. If no issue, then swap the second in and remove the first card. See if there's issues then.

I tested them alone before because I had made a noob mistake and hadn't noticed it. I didn't do anything stressful on them, so I guess I COULD pull it all back apart again and game on them individually to test.