GSOD, I am out of solutions, please help me.

Hello everyone,

First of all i'd like to introduce myself. My name is Jesse and I am 16 years old. I currently live in the netherlands. Altough my English is decent, I will appologize allready for the mistakes I make in my grammar and or spelling. Last year (June 2014) I have build my own PC with a friend that has helped me. I am run Everything ran OK for a couple of months till suddenly a grey screen appeared when i was playing Bf3. I could still hear my friends talk trough teamspeak and i also could still hear all the game sounds so my guess was that it was the GPU which crashed. Also the other games this problem occures are:

• 
  - Bf3
  - Nosgoth
  - Infestation survivor stories

I googled the problem and i found out it was, just as i thought, the GPU. I've tried several things to fix this problem like:

• 
  - Lowering the clock speed in AMD Overdrive (AMD-O)
  - Adding 10% power (AMD-O)
  - Setting the fanspeed around 40-50% (AMD-O)
  - Disabeling the HD audio device
  - Updating the driver
  - Downgrade to a previous driver
  - Also unplugged the seccond monitor for a while (It did not work)

Also i've checked the MSI afterburner program to check if the tempertures were too high etc. I found out that my GPU usage was everythime almost 100% (98%, 96%, 90% etc.).
My graphics card is an "Sapphire HD7950 Dual X 925MHz AMD PowerTune with Boost" (<- exactly what is says on the box)
My further PC specs are:

Now last week I tried again to fix the problem and people were posting on other forums that a BIOS (firmware) flash on my GPU may be a fix, I downloaded the (what I think) was the good BIOS at the site:www.techpowerup.com/vgabios/ and downloaded the program: ATIWinflash. When i installed the program, I launched it and saved my default BIOS and then inserted the new one I had just downloaded from the site shown above. It kept saying

Subsystem'sIDmismatch

Click to expand...

So I googeled some more and I found out there was a way of flashing it trough the CMD with the command:

atiwinflash -f -p 0 NAMEOFBIOS.rom

Click to expand...

. When I pressed enter nothing happened and the CMD interface gave me the line where it says in witch path I am in right now.
So after some more googeling I found out my GPU has a physical switch on it with 2 options:
1. Default BIOS
2. Editable BIOS
So when I saw that, I opened my case and saw that there was a wire in one of the two fans inside my GPU. Because of that (thick) wire the fan was not spinning at all. I bended the wire around so it was not interering with the fan and hoped that that fixed the problem. I tested it by palying one hour of "Nosgoth" and 30 minutes of BF3 and after that some more Nosgoth when sudenly the screen crashed again, but this time it was a red-ish screen with vertical lines on it. At that point I decided to make this thread and describe it as good as I can and hope one of the awesome people on this forrum can help me.

So. This is my problem and the fixes i have tried. Altough I still have not fixed my problem and i have been trying to for many any hours of work I am glad that I can learn all this new information and maybe in the future help some others. And ofcourse fix this issue

Thanks in advance for reading,
Jesse (Jesser110)