this cause by psu or motherboard or faulty card

[syahin]

i just replace my gt220 to PowerColor HD6950 1gb ddr5. Yesterday my pc start and running in window but on top of screen writing TESTVBIOS but i change back to gt220 it work fine.i change back to HD6950 and it run same again TESTVBIOS and then i go to screen resolution,advanced i saw my pc running on 256mb graphic card.at BIOS INFORMATION it write CAYMAN which is my HD6950 model. So, today i try to boot my pc and my pc start acting weird which all fan is running.Usually my pc got beeps sound starting to window.But now it just all fan spinning and keep black screen.its also keep restart itself.i try change my graphic card to 9500GT which my Pentium 4 use now and its out same result with pc wont start and keep restarting itself.is

I hope someone have solution for this problem.

PC SPEC:
CORE 2 DUO E7400
4GB RAM DDR2
P31-ES3G MOBO
Corsair VS550 550watt
500GB HDD
2x fan 80mm
1 DVD

 

[ichord]

Glad it works for you.

 

[sesumpah]

just update your vbios to original one
1. Download ATIWinflash from http://www.techpowerup.com/downloads/2311/ati-winflash-2-6-7/
2. Download vbios at http://www.techpowerup.com/vgabios/98785/Powercolor.HD6950.1024.110214.rom
3) Run AtiWinflash as Administrator. Select The rom and Click Program.