Unlock your ATI 6950 to a 6970 Thread

ahenners · 1 Mar 2011 at 10:10

kevy1986 said:
As per the previous posts I have taken a dump of my MSI HD6950 bios and unlocked the shaders to HD6970, I have then modded the modded bios using RBE to set the Voltage to 1175, this works perfectly. Ideally I would like to be able to change the clocks to 880 and 1375 but this will not work, card will not boot into windows. I have read that RBE does not support this right now, is this correct ?

Should I now just keep MSI Afterburner to apply the clocks and play games at HD6970 levels. The reason I I have used this method is because there were posts about differnent clock speed on the HD6970 supplied from tutorial, is this the safest mothod right now ?

Yes you can only change the gpu register values in RBE otherwise you won't be able to boot with that bios on your card. Just change the clocks with afterburner

Andrei23 · 1 Mar 2011 at 15:57

Managed to get my HIS 6950@70 to 925/1375 stable after 5 hours of OCCT w/o any errors using 1175mV. I think that is pretty sweet, that I could not only unlock 128 more stream processors but also overclock it by 15% from stock, all with reference cooling. I am also getting way better frames than what I have posted earlier, as I have recently freshly installed W7. good times for 6950 owners

Ezyryder · 1 Mar 2011 at 17:14

Indeed. Good thing about these cards is that they can take on more voltage easily due to shared circuitry with the 6970 (Volterra VRMS!) so they will take 1.2V easily.

GiT · 2 Mar 2011 at 22:57

Got mine to 920/1375 totally stable. Impressive really. Good scores now on 3Dmark11 and Heaven. Tempted to boost voltage and try for 950

ahenners · 3 Mar 2011 at 15:15

Andrei23 said:
Managed to get my HIS 6950@70 to 925/1375 stable after 5 hours of OCCT w/o any errors using 1175mV. I think that is pretty sweet, that I could not only unlock 128 more stream processors but also overclock it by 15% from stock, all with reference cooling. I am also getting way better frames than what I have posted earlier, as I have recently freshly installed W7. good times for 6950 owners

GiT said:
Got mine to 920/1375 totally stable. Impressive really. Good scores now on 3Dmark11 and Heaven. Tempted to boost voltage and try for 950

Which Bios are you guys using? Standard unlock or 6970?

PitchWhite · 3 Mar 2011 at 17:25

bought two of the msi 6950s that are on offer for under 200 each. Both have flashed to 6970 and clocked above 6970 speeds successfully =)

PitchWhite · 3 Mar 2011 at 17:25

woot 250! What do I have to do to access members market?

ahenners · 3 Mar 2011 at 20:55

PitchWhite said:
woot 250! What do I have to do to access members market?

Read FAQ's? Ask in a relevant section? :cool:

Took a quick 1min search to find this:

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Nelly · 4 Mar 2011 at 11:43

Using a Revision B (has dual bios switch) Gigabyte 2GB 6950 with Shader mod, flashed no problem.

Would like to try the 6970 bios, but worried about voltages, I wonder how many cards have broke using a 6970 bios?

TaKeN · 4 Mar 2011 at 14:03

Just flashed my MSi 6950 with the MSi 6970 Bios, time to test it out.

Sayso · 4 Mar 2011 at 15:58

Mine doesn't like like the 6970 bios, though i had bricked it the other day until i remembered about the bios switch

Nelly · 4 Mar 2011 at 15:59

Sayso said:
Mine doesn't like like the 6970 bios, though i had bricked it the other day until i remembered about the bios switch

Did you have problems booting into windows, or with games or with benchmarking?

Nelly · 4 Mar 2011 at 22:01

Not a significant difference in this benchmark comparing 6950 + shader mod and 6950 modded to 6970 bios.

********************* Temps / Auto Fan were 75°C @ 34% and 82°C @ 37% max respectively. *********************

ahenners · 5 Mar 2011 at 17:59

Nelly - Did you try the 6950 shader unlock version at 880/1375?

Just wondering whether the difference in mem clock accounts for the differences or whether the memory timings and other subtleties play a part too.

Nelly · 5 Mar 2011 at 18:46

AndyH_Lufc said:
Nelly - Did you try the 6950 shader unlock version at 880/1375?

Just wondering whether the difference in mem clock accounts for the differences or whether the memory timings and other subtleties play a part too.

I'll have to redo the tests again anyway, I am now using service pack 1 and the benchmark scores slightly lower for some reason.

Will post back later including shader at 1375 for the 6950 unlocked shaders.

Sayso · 5 Mar 2011 at 19:16

Nelly said:
Did you have problems booting into windows, or with games or with benchmarking?

Crashing in windows just browsing. No actual BSOD but locking up etc, im using the 6950 modded bios again running at 920/1300 (with voltage at 1150mV) in games that need the boost but mainly just running at 800/1250.

Nelly · 5 Mar 2011 at 22:37

Okay redone my tests, this time with Win 7 SP1, info included in the results - mininum frame rates have increased by around 4 fps.

ahenners · 6 Mar 2011 at 22:51

Nelly - Awesome job on the retest, good to see that the 6950 + shader unlock at 6970 speeds is as good if not better (margin of error possibly?!) than the 6970 bios which is thought to cause problems.

Nelly · 6 Mar 2011 at 23:04

AndyH_Lufc said:
Nelly - Awesome job on the retest, good to see that the 6950 + shader unlock at 6970 speeds is as good if not better (margin of error possibly?!) than the 6970 bios which is thought to cause problems.

Thanks.

If I ran the tests again the results would be different again within 10 points, it's just the benchmark.

I'm currently running at 840/1325 that way the 2D clocks drop down to 250/150, I wish their was a way to increase the 6950 CCC clocks higher, MSI Afterburner disables the power saving feature past the CCC max 840/1325

ahenners · 7 Mar 2011 at 10:15

Nelly said:
Thanks. If I ran the tests again the results would be different again within 10 points, it's just the benchmark.

I'm currently running at 840/1325 that way the 2D clocks drop down to 250/150, I wish their was a way to increase the 6950 CCC clocks higher, MSI Afterburner disables the power saving feature past the CCC max 840/1325

Afterburner does yes. I use Sapphire Trixx for my overclock of 900/1375 and RBE to change the voltage. Powerplay still works perfect and drops back to 250/150 for 2d. I also found it much easier to set a custom fan curve in Trixx as well. I agree though, CCC should enable unofficial overclocking as it would be much easier!