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PCS+ 7950 3GB has stopped working?!

post #1 of 10
Thread Starter 
Hey there,

I have a Powercolor HD7950 PCS+ 3GB GPU and ever since I got it, when I go on certain pages with embedded flash, my screen would instantly artifact and usually required a reboot to regain the screen, This has happened for a few months now, I have tried various drivers and they all have the same results. Ive tried turning hardware accelleration off in chrome/flash player and it has still caused the same problem. I have just tried to reflash the bios on the card because I assumed it was a power state problem, if I pressed Ctrl + Alt + Del fast enough, it would recover and I could use the PC unless I maximised the window which triggered it. Then it would go again and need a reboot. Anyway, I used ATIWinFlash to flash the bios found on TechPowerUp for my card, and it flashed successfully, but now, after the reboot, my PC will not post anymore since flashing the card. Im using my old 4890 for now, but if the 7950 is plugged into any PCI-E slot with or without PCI power cables, the PC refuses to post?

Any suggestions to save my GPU, or should I start RMA proceedings?

Thanks, donk165
post #2 of 10
donk, did you save the bios for your GPU? if not, you may have to look for it at Techpowerup.

anyway, do the following steps using your HD4980:

1. Download 13.11 WHQL and place it on your Desktop
2. Run it like you are going to Install it BUT choose Uninstall>Express>Uninstall all Folders (this is assuming this driver will run even if it detects no 7900 series card installed)
3. Shutdown your system
4. Clear the CMOS on your motherboard. (Read the manual for more info)
5. Replace your HD4890 with the 7950
6. Turn the small switch on top of the HD7950 from 1 to 2.( or 2 to 1) Near the bracket and it is tiny.
7. Boot
8. Run 13.11 WHQL but this time choose Install>Express>Add Folders(You'll be asked)

gl! if you are successful . . . go research your original BIOS switch back to 1 or 2 position while the system is running (be careful not to touch anything else) and reflash it to the original BIOS. if it does not work just switch back and reboot and try again. Please do not bork both BIOSES. It is possible.

NOTE: It may also be possible to use whatever driver you have for the HD4890 to uninstall existing driver.
Edited by rdr09 - 11/25/13 at 12:56pm
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post #3 of 10
Thread Starter 
Hey there, thanks for the reply man, I didn't save my bios because I'm a fool! And also, as far as I can tell, I don't have a bios switch on my 7950, its a custom board. I've googled to check if it has one but had no luck. Without the switch, am I screwed?
post #4 of 10
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post #5 of 10
Besides what the above poster said, NEVER use atiwinflash to flash your card. The only"Atiwinflash" that was ever known to be fully safe was the embedded one for original 7970 cards back when the ghz edition first came out and AMD released an unofficial flasher to flash reference boards to ghz edition. You always want to use the MS DOS/command line Atiflash to flash cards.

If you don't get video after POST, you need to boot with another card (PCIE or PCI) and if its pci, set your bios to boot pci first, otherwise move the dead card to a lower PCI slot and the backup card to the higher pci slot, and then use the proper command line switch in atiflash to flash to card #2 (forgot which, you need to do your own research on that).

You also need to keep in mind that there were more than one REVISON of reference 7970, and newer revision bioses will NOT work with the origniali cards, and vice versa. This may also apply to 7950's, too, so you may need one with a similar date as to when your exact card was released.
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post #6 of 10
Thread Starter 
Okay, thanks so much for that picture, I found the switch and the PC has booted up fine now, so how would I go about flashing the other bios back to stock? I have saved this current bios which I'm guessing is the OC bios?

It was foolish to flash with windows and not backing up my original. tongue.gif
post #7 of 10
Quote:
Originally Posted by donk165 View Post

Okay, thanks so much for that picture, I found the switch and the PC has booted up fine now, so how would I go about flashing the other bios back to stock? I have saved this current bios which I'm guessing is the OC bios?

It was foolish to flash with windows and not backing up my original. tongue.gif

great.

1. Look for the original bios if you can either from the manufacturer's site or here . . .

http://www.techpowerup.com/vgabios/

you can also use the one you saved. up to you.

2. then follow the procedure here in this thread . . .

the R9 290 Unlocking guide. it is the same steps.

http://www.overclock.net/t/1443242/the-r9-290-290x-unlock-thread

NOTE: Make sure you switch to the bork bios before starting with the actual Flashing step.
Edited by rdr09 - 11/26/13 at 8:22pm
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post #8 of 10
1. Follow steps 1-4 on the 290 unlocking guide (linked above).
2. Afterwards, refer to the "Unbricking your Card" section. You will need another card, unless you are able to use the internal gpu in your cpu.
post #9 of 10
Quote:
Originally Posted by airisom2 View Post

1. Follow steps 1-4 on the 290 unlocking guide (linked above).
2. Afterwards, refer to the "Unbricking your Card" section. You will need another card, unless you are able to use the internal gpu in your cpu.

Thanks air. +rep.

i had to get out of bed to verify the steps.
Second Intel Rig
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Second Intel Rig
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CPUMotherboardGraphicsRAM
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850 540 
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post #10 of 10
Thread Starter 
So a few days ago, I checked and I've been running BIOS 2 since I opened this thread. I had completely forgotten to fix the problem, I've downloaded the correct bios and flashed it on using a different backup card to make it happen.

I did wonder why my card was always clocked at 800mhz instead of 880mhz. All sorted now, cant believe its taken me this long to notice biggrin.gif
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