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What 6950 to get for unlock?

post #1 of 19
Thread Starter 
1GB or 2GB?

I want to unlock it but i couldn't really find out which ones are still obtainable with the dual BIOS switch.

SAPPHIRE/XFX are my preferred manufacturers, but i am open for new ones.

I really don't know which ones are still produced to be unlockable, and i have no clue what a reference version is and what is a non-ref (i know what it means but not how to find out)

If you suggest one please write modelnumber here so i can check if any shop in the EU still sells it.
    
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post #2 of 19
reference pcbs are what you want for unlocking. they have the amd logo near the pcie pins. there are no ref 1gb cards, so they are less likely to unlock.
don't forget that unlocking only gives 3% more performance...overclocking gives around 18%.
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post #3 of 19
Most 2gb reference card models unlock to a 6970.

1) For Sapphire, this is the one that unlocks - http://www.sapphiretech.com/presenta...=0001&pid=1021
2) For MSI - MSI HD 6950 2gb (R6950-2PM2D2GD5)
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post #4 of 19
Well my Asus 2Gb unlocked perfectlyy, not sure about the revisions though
post #5 of 19
Quote:
Originally Posted by fluxlite View Post
reference pcbs are what you want for unlocking. they have the amd logo near the pcie pins. there are no ref 1gb cards, so they are less likely to unlock.
don't forget that unlocking only gives 3% more performance...overclocking gives around 18%.
post #6 of 19
Thread Starter 
Quote:
Originally Posted by fluxlite View Post
reference pcbs are what you want for unlocking. they have the amd logo near the pcie pins. there are no ref 1gb cards, so they are less likely to unlock.
don't forget that unlocking only gives 3% more performance...overclocking gives around 18%.
ye i also plan to OC but it's not relevant to the topic.




Quote:
Originally Posted by mark_thaddeus View Post
Most 2gb reference card models unlock to a 6970.

1) For Sapphire, this is the one that unlocks - http://www.sapphiretech.com/presenta...=0001&pid=1021
2) For MSI - MSI HD 6950 2gb (R6950-2PM2D2GD5)

this is the 21188-00-40R right?
Edited by brolly - 5/20/11 at 3:26am
    
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post #7 of 19
Quote:
Originally Posted by joemunky View Post
http://www.overclock.net/amd-ati/909...-unlocked.html

Quote:
6950 Stock: 4652
6950 OC: 5078

6950 Shader Unlock: 4765
6950 Shader Unlock OC +20% PC: 5202
i'm on my phone, and I can find the specific post that said 3%, but 4652 vs 4765 is just below 3%.

my point being unlocking shaders provides little performance increase, and more shaders do not scale with higher clocks.

anyway, this is pretty off topic.
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post #8 of 19
I'm no expert on ATi's I've been an nVidia fan boy since the beginnig.

But I bought my 1st ATi last week. An ASUS 2GB 6950.

Here's what I found...

The stock ASUS 6950 has a clock limit of 850mHz, only when you unlock it to a 6970, can you then over clock it past 850mHz. I got min up to 950mHz and 925mHz stable.

Now you maybe able to unlock the OC limit without also unlocking the shaders, but whats the point? It takes 5 mins to flash the bios and you get higher OC limits and more shaders.

Here's my 3D mark results...

6950 stock (810mHz) 18940
6970 stock (880mHz) 20765
6970 o/c (950mHz) 21703

I should do a 6950 o/c too, but it will only go up to 850mHz anyway, so there's not much point!

I'm using this--> http://www.ebuyer.com/product/250400
Edited by Tmp - 5/20/11 at 4:47am
post #9 of 19
Quote:
Originally Posted by Tmp View Post
I'm no expert on ATi's I've been an nVidia fan boy since the beginnig.

But I bought my 1st ATi last week. An ASUS 2GB 6950.

Here's what I found...

The stock ASUS 6950 has a clock limit of 850mHz, only when you unlock it to a 6970, can you then over clock it past 850mHz. I got min up to 950mHz and 925mHz stable.

Now you maybe able to unlock the OC limit without also unlocking the shaders, but whats the point? It takes 5 mins to flash the bios and you get higher OC limits and more shaders.

Here's my 3D mark results...

6950 stock (810mHz) 18940
6970 stock (880mHz) 20765
6970 o/c (950mHz) 21703

I should do a 6950 o/c too, but it will only go up to 850mHz anyway, so there's not much point!

I'm using this--> http://www.ebuyer.com/product/250400
Unlocking to full 6970 is nice and dandy, until the memory timing and volt increase comes back to haunt you. I am not saying this will happen to you as there are many (I think) that are running with a 6970 BIOS no problem and yet some other bricked their card.
If OP decides to unlock to full 6970 BIOS, more power to him. And if he wants to do just the shader unlock, why not get the extra 3% plus whatever you get from overclocking it
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post #10 of 19
im planning to buy a 6950 too, and also to unlock it and oc.

just to be sure: ONLY unlocking the shaders is no risk at all right? given it unlocks at all

OC'ing isn't such a great risk? even if you run it at 920 ish for daily use/gaming?

and unlocking and OC'ing at the same time isnt dangerous either?
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