Custom Gaming Rig BSoD while Crossfire is on

Hello, I have been having a major issue with my custom built gaming rig. I built it last August and it ran just fine until around December last year. Whenever I was playing games, after a while the sound would stutter really bad and the screen would freeze. This would last a second but it kept happening every few seconds when it really got bad. Restarts wouldn't help. Even after I stopped playing the game it would audio/video stutter while just my desktop was up. I did a system restore and that didn't fix it. I did a full length virus/malware/spyware scan and didn't find anything. I updated my graphics driver from the manufacturers website since Windows told me it was good. Windows says my audio drivers are good too. I think I updated the audio driver from the manufacturers website but the driver version didn't change so I'm not sure if it did. Finally I just completely wiped my computer.
I still continued to experience this problem. I read somewhere that a cheap PSU could be the cause. Well I had a 730w RaidMax. Decided to rule that factor out so I replaced it with a 750w Corsair PSU. During the same period I decided to upgrade my Sapphire 7770 to 2 Sapphire 7850's in CrossFire configuration.
The results are still frustrating. It appears my Audio/Video stuttering is now gone. From what I've tested so far anyway. Now this is where I'm really having a problem. I turned on CrossFire and launched Crysis 2. I loaded up a save and after 5 seconds in the mission my computer BSoDs. It does this like clockwork every time. When I turn CrossFire off my system appears to work fine. Although when I finished testing Crysis 2 with CrossFire off, I went to launch another program and it BSoD. So there is something definitely wrong still. Another thing I will mention is both my Graphic cards are overclocked using MSI afterburner. The first time Crysis crashed on me, I immediately restored my graphic cards to factory clock. It produced the same results so it would appear overclocking is not the culprit. I launched Crysis 2 again today to reproduce the results so the only .DMP file that needs viewed is the one from today. I just decided to leave the others in the upload just in case.
Please if anybody can help me, I would greatly appreciate it! :)
I've been playing around the past few days and have found out that my original problem still hasnt gone away. After playing Saints Row 4 for a while the audio/video stuttering came back and got so bad that I had to stop playing. Could this be a possible bad motherboard?
Another thing I forgot to mention, a few months back when I went to boot up my computer, I was greeted with Gigabyte's back up bios software. Apparently my main bios somehow corrupted so the back up bios had to restore the main. I was thankful for that feature but at the same time worried why that happened.

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