Overclocking programme for HD6950

[shawsy109]

Ok, As the title says, I am wishing to overclock my HIS HD6950 ICE Q 2gb but ccc is rather weak. I want to be able to up the clocks past 840/1325 which im limited to atm. All i want is to get some more grunt in BF3 as im getting some fps drops at certain pojnts during multilayer.

I dont want to brick it either by messing it up to much, so if anyone has a guide or advice id love that ty.

This is just for a few weeks until i get a 680 to go with my new BENQ XL2410T that i got today.

 

[shawsy109]

Give this a go:

MSI Afterburner 2.2.0 (2012-04-19) - Huge changes!

Download link in the OP.

You'll likely need to set Power Control to +20% in the CCC for serious overclocking.

Literally downloaded as i read this lol, i tried it before, but i dont know how to unlock the clcocks, its stuck at 840/1325 and no option to go further, also, no idea what voltage limit is safe, dont wanna fry it.

 

[shawsy109]

It depends how far you want to push it.

I have the Sapphire HD 6950 Toxic unlocked to HD 6970.

1.25V will get it up to 1GHz on the GPU core but I wouldn't use that long term.

1.175-1.2V gets it to 950MHz.

I'd see how far you can get on stock volts and keep an eye on the GPU temperature.

It it isn't getting too hot then up the volts a touch and see how far that gets you with clock speed and temperature.

Rinse and repeat until you can't get a stable overclock or until you reach the limit of a temperature you're comfortable with.

Concentrate on overclocking the GPU core.

Overclocking the VRAM gives the least gains and you reach a point where it appears to be OK but what's happening is that the error correction kicks in and although it seems to be running faster it's actually reducing performance.

As mentioned set up a custom fan profile.

I understand mate, thanks. But I have already asked this, but I will ask again, using trixx, after burner and just now tried ASUS gpu tweak, they let me change volts, but clocks are locked at 840 on the core, and 1325 on memory and will not let me up it.

Will someone give me a guide of how to unlock the clocks so i can go further! before i smash up my new screen lol

 

[shawsy109]

Your sig is all kinds of wrong shawsy Have a read of the FAQ

Really? im asking for advice id im getting called out for a signature. Whats wrong with it exactly? I dont get it.

 

[shawsy109]

Im just going to give up and run it at the max ccc allows. Can not be bothered with the messing around with cfg files inside msi as lots of posts suggest. I will be getting a new card in 3 weeks anyway.

 

[shawsy109]

Seems to work

It involves editing a .cfg file, and now i could (theoretically) shove my core and memory up to 2000MHz...

Instructions:

Worked!! thanks so much.

900/1350 @ 1.175v custom fan setting and its sitting at 53 degrees in bf3 and hits around 60 in kombustor until the fan settings take over and gets it back to 50 ish.

Anyone else wanna post there 6950 clocks and volts?

 

[shawsy109]

And you'll find some in here: *** The Official ATI Radeon HD 6950 Overclocking Thread ***

cheers mate, pretty old thread, il just oc my card and leave that thread alone. No one cares for little old 6950's anymore. Il be moving onto a 680 once i have cash saved anyway.

 

[shawsy109]

6950>70 CrossFire:

1.175v up to 950MHz/1350MHz

1.26v 1GHz/1350MHz(Usually just for benching)

Most of the time they are running 950MHz/[email protected] as, in CrossFire, they are phenominal(heavily oc'd 680/7970 at least equalling performance).

Maybe something for you to think about rather than splashing out on a very costly 680!

This HIS 6950 iceQ i have is a monster, its at 950/1350 on 1.175v.

Just running kombustor with it at 1Ghz/1350 @ 1.25v and custom fan keeping it at 60 degrees with fan at 60%.

Think im just gonna stick with 950/1350 on 1.175v, dont wanna hurt it. Id go for a 2nd card right now if i could, but my mobo's other pci-e slot is x4 only plus my psu is a 650w and it hasnt got the extra 2 6pin power connectors.

my mobo

http://www.overclockers.co.uk/showproduct.php?prodid=MB-364-GI&groupid=701&catid=5&subcat=1990

my psu, I think it has spare molex connectors for the adapters that come with the card.

http://www.overclockers.co.uk/showproduct.php?prodid=CA-056-OC&groupid=701&catid=123&subcat=1098

I really would get a 2nd card if i was sure the performance would be good. I mean the card costs 215 quid on OCuk right now, better than spending 450 on a gtx680. Even a psu upgrade and a 2nd card, but the x4 pci-e slot on the mobo might hold it back. The clocks im running at i reckon 650w isnt enough for 2 cards. I would defo have to upgrade the PSU.

 

[shawsy109]

Be careful your memory doesn't go pop!

It will be the first thing that goes pop, memory oc'ing doesn't get you very much performance gains at all on the 69**'s.

Others in the forum have ran 2 6950's on a 650w psu, but get some conformation first, I'm using a 750w Seasonic myself.

The 4x lane some say it only nocks a small amount of performance off, but again read up on it first along with doing your homework on CrossFire that's the most important part to read up on if you are thinking about it.

Im going to look into it, I have always been told a powerful single card is better than 2 less powerful cards, power and heat wise. I change my mind so much, a month ago it was xfire, then a 7970, then a 680, now back to xfire lol.