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What volts for your 7970 overclocks?

BS Dave

BS Dave

BS Dave

Soldato
Joined
19 Oct 2004
Posts
4,946
Location
London
Hi

Can you tell me what volts you're using to get your 7970 overclocks?

Davebeast and everyone else how are you fairing?

thanks

Dave

OK here are all the results so far (up to post 28). Just to be clear these are the overclocks people have got on stock volts, then by adding more voltage.

Me BS Dave (which stands for Brave Sir Dave (old joint ops ign), incase every everyone thought it was bulls**t
Stock 1100/1650@1112mv
OC 1200/1650@1174mv (still testing this but it seems stable after quite a few hours of BF3 and Heaven 3.0)

ALXAndy
Stock 925mhz@1049mv
OC 1125mhz (not max)@1100mv

dave_beast (Powercolor)
stock 1150/1650@1174mv
OC 1250/1750@1200mv

chief barker (Gigbyte Windforce)
stock 1125/1525@1174mv
Not tried to OC further

Awahwah
stock 1200@1174mv

wolvers (Asus)
stock 1150@1175
OC 1250@1250mv

old gamer (XFX)
Stock 1150/1650@???mv

Tonester0011 (Sapphire)
Stock 1150/1600@1174mv
OC 1215/1815@1250mv

The Baron
Stock 1150/1250??@???mv

EchostarUK
Stock 1125/1425@1174mv
OC 1200/1800@1200mv
 
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My card came stock 925mhz @ 1049mv.

I had to up the voltage to 1100mv for 1125mhz.

Not pushed on any farther because when I hacked the cfg files in AB for some reason I was then locked at 500mhz on the right side max clock display :S
 
I'm stable at 1150/1650 on stock volts just using CCC with the unlocked BIOS.

When using Trixx for benching etc, vcore set at 1.25v I can get to 1250/1750 without artifcating, anything more and I get BSOD's and CTD's/driver recover etc. Have tried 1.3v but it's exactly the same tbh.
 
Yeah but what are your stock volts Dave?

Because they differ wildly. Mine is 1049mv (being exact) and Asus use 1100 and I've seen a mate with a Powercolor use 1174 stock and a VTX the same :S
 
I did yes but it just said they weren't compatible.

Weird. Mind you not that I'm complaining. When I put it back to stock 1049 is bugger all.

Ed. I actually got my card to 1030mhz on that 1049 too. I hadn't unlocked the volts at the time so didn't realise they were so low.
 
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I'm running both my 7970 windforce cards @ 1125/1525 with the stock 1174 mv that the cards came in at.

I haven't tried any faster yet.

Is there a way of upping the memory voltage?
 
Man 1174 stock. Dang that's bloody high.

My card does it (1125) pish on 1100.

Guess what my mate told me was true then. Early cores were more stable on lower volts, then they ramped up the production numbers.
 
kitch9 said:
I would imagine voltage is set by individual chips rather than brand.
Click to expand...

Can't see that. Can't see XFX or Asus sitting down and seeing what every single last card needs to be stable.

All I can think is that the other companies (Powercolour and VTX) wanted to make 100% sure that the cards could do 1125.

Even Asus cards come with 1100mv

Either that or because they're two bit AMD gave them crappier cards.
 
Mine is a 1175 volt card but will do 1200 bf3 for 3 hrs stable. Found the key for stability is a custom fan profile that will not allow the fore above 65.

Hope this helps.
 
Mines an 1175mV volt card as well (Asus) and does 1150MHz on that, 1250MHz with 1250mV.

We could do with a thread to show max clocks really, makes me laugh that Nvidia fans can't accept that they'll hit 1200MHz more often than not. I was disappointed that mine wouldn't do 1300MHz after reading about some that do. :D
 
ALXAndy said:
Can't see that. Can't see XFX or Asus sitting down and seeing what every single last card needs to be stable.

All I can think is that the other companies (Powercolour and VTX) wanted to make 100% sure that the cards could do 1125.

Even Asus cards come with 1100mv

Either that or because they're two bit AMD gave them crappier cards.
Click to expand...

Nvidia did it with the 480, and 580. Each GPU was tested and the VID is then burned into the chip, which the cards bios then picks up and uses, this would be a fairly easy process to automate.

Every chip can be different, and they are not made equal... There's some talk that the 680's reviewers got are high binned parts which actually boost higher than a typical retail card, but that is to be confirmed.
 
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Tonester0011 said:
My Sapphire does 1150/1600 @1174mv (stock)

Managed to get 1215/1815 @1250mv

I tend to just stick with max sliders (1125/1575) when gaming though.
Click to expand...

I am roughly the same with slightly lower ram clocks.

XFX 7970s with Waterblocks.

For benching the current driver set is borked anyway without hacking around, I would stick to the max Catalyst sliders for now and be done.

I did not get any benefit going past 1.25V.

Looking at other forums most 7970's seem to be hitting a brick wall around 1200MHZ on the GPU even with LN2.

The RAM clocks are puzzling me, some people get stilly high clocks on their RAM and others artifact from 1500Mhz upwards.
 
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