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Radeon HD 7950 Flashed to Radeon HD 7970 Ghz Edition.

post #1 of 12
Thread Starter 
Picked up some cheap Gigabyte Windforce 7950's a few days back (£150 each after selling codes biggrin.gif), had a chance to have a proper mess with them today. My 7950's have 6pin + 8pin power config, looked at some of the threads here about flashing to unlock voltage control etc. Anyway thought I would chance my luck at the ATI 7970 Ghz Edition Bios from TPU, so we know you can't unlock shaders by flashing with that said though were some very impressive results...

My previous clocks were 1000mhz core and 1250mhz memory, the card would not overclock very well, any raise beyond 1350 on the memory would cause system lock / crash, and the core was pretty much at max.

So I flashed the card via USB dos boot method, stock clocks after flash are 1050mhz core and 1500mhz memory, a massive difference in clocks and rock solid stable.



Performance has improved massively, stock score of 15,000 in 3DMark11, that's OC Titan territory, and all for £300..

Clocks and performance aside there are some other cool benefits imho, the fan profile is now much less aggressive, before the flash my card would try to keep temps at around 70c, it would spin up frequently was loud and annoying unless I made a custom fan profile via AB, now the fan profile is much more relaxed.

The card is kept ticking over at around 82c max, very relaxed fans really nice and quiet, also the clock speed is dynamic so rather than go past those temps it will clock down to 950/1000 for example to let the card cool then back up to max turbo when temp is ok. This method is far better imho as it's so much quieter and performance is awesome. No need to make custom fan profile anymore, it is spot on..

Another advantage is idle voltage has been reduced, idle is now 0.850v from 0.950v.

Ran a few benchies, all at stock card setting with GHZ Bios.

3DMark11 Score - P15063

http://www.3dmark.com/3dm11/6628255



Unigine Valley Score - 3421



Metro LL


Edited by Pheonix777z - 5/25/13 at 4:34pm
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post #2 of 12
Thread Starter 
^^^^

Scores above are at stock Ghz bios clocks, with GPU / CPU overclock..



3DMark11 Score - 16508

http://www.3dmark.com/3dm11/6628704

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post #3 of 12
That is impressive!
Would you be so kind as to upload the bios, I am having no luck to overclock my crossfire of gigabyte 7950.
I have tried every bios known to man and always have hard locks changing clocks, the only bios that works stable is the original FZ1.

Thanks in advance, looking foward to try your bios to see if it brings me any luck.
post #4 of 12
Thread Starter 
Quote:
Originally Posted by Kamainae View Post

That is impressive!
Would you be so kind as to upload the bios, I am having no luck to overclock my crossfire of gigabyte 7950.
I have tried every bios known to man and always have hard locks changing clocks, the only bios that works stable is the original FZ1.

Thanks in advance, looking foward to try your bios to see if it brings me any luck.

Hey, this is the bios I used for my 7950's: http://www.techpowerup.com/vgabios/123125/ati-hd7970-3072-120628.html

Good luck.

My cards are ripping through everything with this bios, even Crysis 3 and Metro last light all maxed out @ 1440p. Awesome lil cards these 7950's..
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post #5 of 12
Does the HDMI out still work? I remember I flashed a 7970 bios a while back and the HDMI wouldn't work..
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post #6 of 12
Thats weird your overclocking headroom increases with that BIOS. Must be voltages?

I dont think the BIOS is really your saving grace here, you probably could have gotten the same results by overvolting and making a custom fan curve.

However the idle voltage change is nice, and if you are more comfortable flashing the BIOS than doing those other things, then, well, good for you. Enjoy the card smile.gif
post #7 of 12
Nice on your flashing out come, your one of the few that has had any type of gain worth it.
I have been thinking of flashing my vapor-x the same way just for the hell of it to see if any changes.
    
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post #8 of 12
I tried many 7970 BIOS for my Vapor-X to no avail. Only a couple BIOS worked for it, and IIRC they were all 7950 V-X bios [theres a LOT]
post #9 of 12
The bios you posted does not have a correct device id (it has 6798) and with a forced flash it fails to install drivers. Its strange that works with your cards.

Thanks none the less.
post #10 of 12
Would your card still output A displAy with the force flashed bios and not allowing you to install drivers
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