Cant seem to change Voltage on 7970m GPU in P150HM

Ok , card runs great at stock speeds - but part of the fun is trying for a stable over clock.

I have flashed the Vbios with various different ones (Including the excellent ones put together on this forum) but according to MSI Kombustor and Open hardware monitor they voltage has not changed (It is around 0.9 at idle, goes up to 0.975)

Tried using various other programs to monitor it but GPU-Z or HWiNFO 64 do not show what the voltage is.

Also have tried various edits to the MSI afterburner cfg file - and cant unlock the Voltage slider on it.

A small over clock makes the screen flicker - but only on the 2d clocks, in 3d clocks it seems to run fine. Though eventually the 2d flickering will cause the display drive to stop working.

Temps are fine - 34 idle, 80 max load, and i am using the latest AMD 9.xx beta drivers.

Anyone who has got any ideas, please let me know as its been driving me crazy all day - i want to get some benches done

Thanks PJ

Excuse my rather novice entry in to the world of laptop overclocking , but i guess learning is part of the process

 

no need for excuses buddy, im as flabbergasted by this as u are...! the 2d flickering issue when OCing seems to be "normal", its the same in my case and with other users too. as long as the 3d clocks are stable at the OC i dont mind tho. besides, the flickering stops after a while in my case
the only factor left is that ur gpu is somehow differently wired than others. strangely, the users reporting a stock voltage of 1.00v were still able to up their vcore by flashing the modded vbios. so why in heck it doesnt work with ur card i have NO idea...
this is probably a case for the big boys! svl7? prema? SGDXXDGS? (probably got the spelling wrong with this one, cant ever get it right )

Sent from my Galaxy Nexus using Tapatalk 2

 

I've yet to try and flash my 7970M to a different voltage. My card is one of the ones that runs at 1.00V @ 3D clocks, whereas others who have used the exact vBIOS that I pulled from my card had reference 1.05V @ 3D clocks. Makes me rather curious if my voltage will change either.

As for the flickering and tearing you guys are getting on the desktop or in 2D, I found it to be an issue with PowerPlay. In the configuration file for MSI Afterburner, change the value for "UnofficialOverclockingMode" to 2 instead of 1 to disable PowerPlay and the flickering/tearing should stop. Keep in mind that your clocks are going to run at a constant value to whatever you set in Afterburner, and to have your card automatically clock back down in 2D applications you'll need to reboot or enable PowerPlay again in the config file and reset your clocks.

I'll be sure to get back to you guys whether or not my voltage changes with a new vBIOS flash when I get around to it. I'd definitely like to see if I can squeeze more than 935 core out of this thing, especially since I can push 1700 memory already without issue.

 

thanks for the heads-up wallzii +rep

concerning the mem OC: keep in mind that u probably wont be able to push 1700 when the core is OCed to the max as well. definitely keep the focus on the core tho when u balance the two OC clocks out, since it gives u more of a perf boost than the mem.

cheers

edit: crap, seems like ive repped u too often lately? have to spread some love first

edit2: wouldnt it suffice to manually switch on/off the powerplay function in the catalyst center? or does this "hack" work only through MSI´s config file?

 

Well at least I wasn't going crazy - I reverted to 12.7 and it at least over clocks to around 950 and stays stable . From what I read seems that card manufactures produce reference and non reference cards - with the latter being much harder to unlock the voltage unless u have their specific software . Could explain the voltage issue - especially with the enduro issues with em users, maybe amd are trying to make sure nothing else goes wrong with the cards . They knew about enduro all along ! Lol

Seriously though, have exhausted my limited knowledge with trying to unlock it- hit about 6250 marks , which isn't to be sniffed at but it's obviously capable of more .

 

Thanks wallzi very nice

 

When I disabled PowerPlay in CCC, I had some strange and undesirable behavior from my GPU. I believe clock rates would stay at idle and not increase when used for 3D applications. I'll double check that for confirmation when I get home from work.

What was also strange is that my 2D voltage increase to reference at 0.90V instead of the 0.83V it normally sits at for my card.

 

Yes clockrates are stuck at 2D clocks when you disable powerplay

 

I can confirm this also on my GX660R 7970M.

 

Which overclocking method are you using in afterburner? You could perhaps stop it by flashing the bios with the new clocks.