BSoD HD 6950

Hello every one, i´m new here but i´m read this forum a lot, i must say is really amazing that is why i put this issue here because i really need help.

Video card: MSI HD 6950
Memory: G.SKILL 4GB Model F2-8000CL5D-4GBPQ
MOBO: MSI K9N2 SLI Platinum / K9N2 Zilent
Processor :AMD Phenom X4 9850 2500MHz Agena core
Psu: Sentey ERP700-SM 700-Watts Modular Power Supply
OS: Win 7 64 Bit
HD:1 Tb WDD 7200 rpm
Audio card: DIAMOND XtremeSound 5.1/16 bit Sound Card


Ok the story begins, before this card i have 9800 GTX Asus Brand, whit time it get old and trash it but never get problem whit it, then i buy HD 4350 Saphire meanwhile never have problem whit it, the HD 6950 arrive, well i reinstall all the OS to get fresh start, well i run the stuff all was ok, i try mod the video card whit the bios for the HD 6970 and i get no stable system and i get back to old and run the card y many stress like furmark and unigine, that was ok but time to time i geting screen freeze and after reboot i get


Firma con problemas:
Nombre del evento de problema: BlueScreen
Versión del sistema operativo: 6.1.7600.2.0.0.256.1
Id. de configuración regional: 8202

Información adicional del problema:
BCCode: 124
BCP1: 0000000000000000
BCP2: FFFFFA8004DC8798
BCP3: 0000000000000000
BCP4: 0000000000000000
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Archivos que ayudan a describir el problema:
C:\Windows\Minidump\021411-29453-01.dmp
C:\Users\Quit\AppData\Local\Temp\WER-52078-0.sysdata.xml

Lea nuestra declaración de privacidad en línea:
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C:\Windows\system32\es-ES\erofflps.txt





Well i try different Drivers and still the same, is very ramdom some time i play or render something for 5 hour and nothing happend and other i play 20 min and it freeze, and otre times i just on web and it freeze and the same again

ok everyone if u can help please help me out, i need make some 3d Models and pc just does help.
And really sorry my bad gramar but i not english native language.

You need not to give it a 6970 BIOS but a 6950 Shader unlock BIOS. You are running at 6970 voltages and your RAM is also being overvolted which isn't what you want. It can damage your card. Flash back to a 6950 BIOS and save your BIOS using GPU-Z. http://forums.techpowerup.com/showpost.php?p=2137760&postcount=381 Download this and run the program to get you your Modded BIOS. http://www.techpowerup.com/articles/overclocking/vidcard/159 Download the package that includes everything. Go into the file and REPLACE the 6970 BIOS file that should say unlock with your modded BIOS. Run the program and it should only unlock the shaders. That is how I did it and I haven't had any problems. Hope this helps.