Monitor screen goes blank suddenly but pc still running (Cpu fan starts spinnin

Ive been trying to figure out this almost SAME issue with my system.

Heres my specs.

Win 7 64bit
ASUS Rampage lll Formula
Ati HD5850 Crossfired (Brand XFX)
CPU intel i7 950 bloomfield ed.
6 gigs mushkin RAM
Corsair 1k watt PSU certified for sli/xfire

Now, to the meat of what I have been expieriencing. Bought this compy right b4 release of Black Ops in Nov 10. Built it, all seemed hunky dory.

Started getting some strange voltage issue with my Motherboard reporting (AI Suite for ASUS). Long story short started getting these random Monitor shuts down and you can hear fans kick up to 100%, I never could determine if it was the GPU fans or CPU, or Chassis fans. Or all at once. Regardless it was noticibly louder. Scenarios in which this would happen. It would come out of sleep mode, and almost 30 sec later would kick the issue. If Im running a game with crossfire, or even a single GPU, game would last random times, never predictable. Lastly would start up and after bios would kick in.

Funny thing was, I could have this running ALL night (idle). Then when id switch my input to the Computer on my system, it would have the issue. Like right as the video showed up on screen. So I eventually got an RMA for my 'problem' gfx card, and seemed like it was fixed. Then it came back... and with even more regularity.

Noticed 2 pins on my ATX connector were badly melted coming from my PSU, and the female end on the Mobo, the pins were brown colored and not shiney silver like the other 22 pins. RMA a PSU, then RMA a Mobo. Bought a V8 fan for CPU, and put together. NO ISSUES! but wait... no more than 2 months later. THAT DAMN ISSUE WITH THE MONITOR SHUTTING OFF AND COMPUTER STILL RUNNING, FANS A BLAZING, CAME BACK.... to my disgust.

What gives?? I really do not think its CPU, it all points toward GPU's. As my ligitech G15 keyboard showed GPU1 as some whacky wierd readings. -1 temp, GPU usage at 200%. etc. While gpu 2 looks normal.

Problem is now, I just got a RMA going for my new 'problem' gpu and no more than a day later that issue showed up again.. monitor off, fans ON..

For shits and gigs, I looked at the atx connector to see if im getting some bad voltages or something. Believe it or not even with all the new hardware those same 2 pins are semi brown colored, showin me i might still just be having a power issue. This is completely frustrating for me. A 2k system (at the time) that has been SO unreliable to me.. Anyone else maybe have some Ideas for both of us??

PS Atishd.. please tell me you dont have XFX cards. If you do we might just have figured out the issue. Im --> <--- close to going with a Saphire 6970 card..and not dealing with XFX again.