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Chnaging from gtx 8800 to 7850 HD

igorm

igorm

igorm

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Joined
18 Apr 2012
Posts
251
Location
London
I have received my B grade Gigabyte Radeon 7850 HD GPU and installed it. Tbh, I dont know what happened to my PC after that, but all went wrong. Ihave installed drivers for the new GPU (at least I think) and uninstalled old nvidia drivers and restarted PC, after which my desktop looks weird as if it changed colour scheme (as it does to inscrease performance), cant launch rivatuner (even after reinstalling), AIDA64 cant tell me what GPU I have and cant launch any game (since changed from directx 9 to 11)
How to fix it? I have never changed GPU with different directx support, didn't know it will cause so much of a hastle.

P.C. I am not sure if my PSU is good enough for it, I have This one.
 
Have you ran driver sweep to be absolutely sure there were no Nvidia drivers leftover?

Also have you updated your motherboard BIOS? Thats if your motherboard supports the 7850?
 
Downloading driver sweeper now.

Not sure if my MB is compatible with this GPU (I feel stupid now that I have checked it before and I am not even sure how to ckeck the compatibility - I have Asus P5QL PRO).
 
You might want to give either ASUS or Gigabyte a shout and ask if the motherboard supports the GPU and vice versa ;)
 
I will wait for their reply then.

Assuming it is compatible, what else can I do? Ran driver sweeper - cleaned everything, didn't help.
 
is your catalyst installed all ok ?if so which version did you install?

You have a spare hardrive/ partition and reinstall windows onto it, and then try catalyst from a fresh for testing purposes.
 
downloading vga driver and vga bios (f*ck knows what that is) from gigabyte website..

P.S. i didn't know I will be strugling so much with new GPU installation, after managing to reasemble whole pc and ocing my cpu.... lol

VGA Bios I was downloading seems to be of f31 file extension, as far as I remember it is for BIOS flashing, isn't it?
 
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Thats the latest version then. You can either flash your BIOS via a memory stick or use @BIOS to update to the latest BIOS for the mobo.
 
Just flashed my bios and ****** up my CPU overclocking settings and I can't remember what voltage with I managed to stabilise it… just lost around 7 hours of restarting and crashing, and stress testing. Good job me for not saving the settings…

P.s. latest bios version didn't fix the problem, neither did full driver reinstall
 
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igorm said:
Just flashed my bios and ****** up my CPU overclocking settings and I can't remember what voltage with I managed to stabilise it… just lost around 7 hours of restarting and crashing, and stress testing. Good job me for not saving the settings…

P.s. latest bios version didn't fix the problem, neither did full driver reinstall
Click to expand...

Ouch. Hope you can get everything sorted. Feel for you.
 
By the way, driver downloaded from gigabyte's website is an old version of catalyst, so won't help either.
 
I just realised that I forgot to mention that I have added some extra ram sticks at the same time and thought if that could cause the problems I have? (I don't know what it might be so suggesting everything)
 
Have you tried running it with just your original RAM? You may need to up the voltage requirement for the RAM sticks on 0.5 volt notches.
 
I haven't, not yet, since I was concentrating too hard not to buy baseball bat and smash my new GPU with it and forgot all about RAM lol. But it seems that windows recognised all 8gigs of RAM, as far as I remember.

Will get home and try removing the new RAM

P.s. I have 4 ram sticks in total now, 2 old and 2 new ones. The old ones are with 5-5-5-18 timing, but the new ones are 5-5-5-15. I was convinced that bios on auto will downgrade the fastest one, but can my problems be cause by it if it doesn't for some reasons and how to make sure it does change it.
 
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Sorry to hear you're having troubles.


Start by removing the catalyst drivers, driversweep.

Remove new ram. Ensure AMD card is seated properly.

Reboot PC and install latest catalyst drivers. Reboot.

Does it work properly, is the AMD GPU detected properly etc

If NO, uninstall catalyst, driversweep. Turn off PC.

Install Nvidia gfx card, bootup, install latest drivers, does it work?
 
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