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Can't get Afterburner to OC my 6950 correctly

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Hey guys, since I've read about how it might be dangereous to flash 6950 cards to 6970 bios... I've done a lot of research to find out how to Overclock the 6950 clock speeds further than the CCC overdrive limits...

I've been told that MSI Afterburner can do that for me... Had to edit the MSI afterburner cfg file and disable ulps in the registry to allow my crossfire setup (2x6950 unlocked shaders) to work with MSI AB...

Now I'm stuck with a new problem:

I've set my settings within AB to run both my cards @ 900mhz/1350mhz... and when I open up 2 instances of GPU-Z... I can see that during playing (@ full load), one of my cards is getting up to 900/1350 but the other stays @ it's stock no matter what I do (800/1250)... Is this normal???

I've also noticed that the name for both cards isn't Exactly the same... Well ... they're both 6950... but on has Cataclyst 11.2 in it's name in GPU-Z and the other just some numbers with no "cataclyst 11.2"...

So I've tried the "syncing the settings to both GPUs" option, and I've also tried to turn that option off. I did manage for like a minute to run both cards @ 900/1350 but then it reset somehow... (BTW I'm using GPU-Z to monitor speeds and voltages...)

I'm also seing this in MSI AB: Both cards show up as unlocked in GPU_Z with 1536 shader count... But in MSI AB, one card shows up with this bios number "013.008.000.010" and the other "013.008.000.009"... That's weird they should be the same BIOS... Maybe it has to do with the fact that one is an HIS and the other an XFX

Pls help
 

sneekypeet

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I should read more :facepalm:

Could flash one bios over to the other card to see if that remedies the issue, but to be honest, you shouldn't NEED to do so to get this setup functioning.
 
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thx... anyone else?
 

bystander

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I've had the same issue. Although, when I've tried changing with the 2nd card active, I've sometimes got them to sync up, but it is really random, and I'm not 100% sure what occurred when I did manage to get them to sync up. I just played with it, until they eventually worked at the right clocks.

However, even when I manged to get them to both work, I run into a different problem. They don't idle properly. The 2nd card will get stuck at full clocks while in 2D mode a lot of the time. And due to running to monitors, I'll sometimes see the 1st run at 450 core, and 1250 memory clocks, while the 2nd card is running at full clocks, or matching the 1st, when it should idle at 250 and 150.
 

OneMoar

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trying to overclock while getting bsods tsk tsk one problem at a time
 
Joined
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Memory Gskill Ripjaws 8gb (2x4gb) 1600mhz 7-8-7-24
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Good news guys... everything worked out... I can get to 960/1470 speed with 1.20 voltage. MSI AB is finally working... Like Bystander was saying, you just gotta keep tryin and it ends up working.

As for idling, I just switch back to CCC settings when I'm done playing... I use hotkeys
 
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