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Author Topic: Sapphire 6950 v2 non-reference performance  (Read 5832 times)
spyjai
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June 06, 2011, 02:40:27 PM
 #21

I bios flashed mine to 6970, and run it overclocked at 950Mhz, but only get roughly 350M/s. What drivers and miners / command lines do you guys use?

1WangHakHgQU5a3HShP7UFX3eg6rWGQQR
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MisterX
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June 06, 2011, 03:09:10 PM
 #22

weird.....

I've a non-reference Sapphire 6950 1GB unlocked and I get about ~340Mhash/s @
800/1250 with command lines -v -f30 -w128

when I overclock it to 900/1250  with command lines -v -f30 -w128 I get about ~385Mhash/s

That's with running 11.5 Cat and SDK 2.4 in Windows 7 ultimate using guiminer/poclbm 05-21-11


BTC Address: 15FXj7jg7XsByoRREf2EewNddYbaqQKLwF
zamarok
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June 06, 2011, 06:45:20 PM
 #23

430 Mhash/s
Temps: 75 C, fan speed: 80%,  core voltage: 1.275 mV
1,000Mhz, unlocked shaders, underclocked RAM.

How does one know if it's a 'reference card' or not?

zamarok, could you please post the exact model and manufacturer of your card? I am highly interested.

Sure. Here's the exact line from my NewEgg email invoice:

14-102-914   VGA SAPPHIRE|100312SR HD6950 2GB R

And I bought it February 12th. I bought it for gaming, and only discovered bitcoin mining in the last few days. Glad I bought this model! Smiley I'm at work, and it's at home mining 430 MHash/s for me. I only have the stock heatsink/fan, but I keep a regular table fan angled at it.. temps staying steady at 73C @ 1270 mV core voltage. I will keep tweaking it to see if I can get more Mhash/s without heating it up too much.

Using the latest poclbm with GUIminer, CCC 11.5, -v 2 -w 128, 1,000 Mhz core clock and 400 Mhz VRM clock, and most importantly +20% OverDrive from CCC. When I first turned up OverDrive, my MHash/s went from about 335 to 390. Oh, and of course I patched my BIOS to unlock the extra shaders. Overclocking the core and underclocking the memory took me the rest of the way to 430.
xioros
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June 07, 2011, 05:12:53 AM
 #24

The solution:

Enable power management to +20 in CCC....
I'm running unlocked @ 900 core: 380-400 Mhash/s

Donate if this fixed your problem:

1L3GxCRZwXEh8VwpPAociZQdTkhSHKGMoY

Grtz

Donate if I helped you :  1L3GxCRZwXEh8VwpPAociZQdTkhSHKGMoY
zamarok
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June 07, 2011, 01:23:41 PM
 #25

The solution:

Enable power management to +20 in CCC....
I'm running unlocked @ 900 core: 380-400 Mhash/s

Donate if this fixed your problem:

1L3GxCRZwXEh8VwpPAociZQdTkhSHKGMoY

Grtz

Dude, I'm the one who posted the solution in the post directly above your post >_> How are you going to accept donations for posting my same answer right under my post?
bitcoinminer
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June 07, 2011, 01:42:12 PM
 #26

The solution:

Enable power management to +20 in CCC....
I'm running unlocked @ 900 core: 380-400 Mhash/s

Donate if this fixed your problem:

1L3GxCRZwXEh8VwpPAociZQdTkhSHKGMoY

Grtz

Dude, I'm the one who posted the solution in the post directly above your post >_> How are you going to accept donations for posting my same answer right under my post?

LOL cuz he was smart enough to take credit and demand payment?  Seriously though, dick move.  How about "Send me an email saying thanks if you appreciated it".

Be fearful when others are greedy, and greedy when others are fearful.

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Waltibaba
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June 11, 2011, 10:08:30 AM
 #27

Ok as these guys said the key is to put power control at +20. I was able to do that when I used CCC, but now I got a 5830 alongside it and CCC had too low limits. So I have to use MSI AB, and I only get 355MH/s on my reference Sapphire 6950 (unlocked) rather than the 405MH/s before. My problem is that with afterburner on, the power control slider resets itself every time you press apply... so anyone have a solution? A proper solution would be worth some bit dimes to me.

12ZzdcQ7pyAcUJS9AGBRHTYcsu8tYLGWBK
"Money needs to be depoliticized, and the time has come for the separation of money and state to be accomplished."  Thomas Greco (2009)
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bitcoinminer
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June 11, 2011, 04:15:59 PM
 #28

Ok as these guys said the key is to put power control at +20. I was able to do that when I used CCC, but now I got a 5830 alongside it and CCC had too low limits. So I have to use MSI AB, and I only get 355MH/s on my reference Sapphire 6950 (unlocked) rather than the 405MH/s before. My problem is that with afterburner on, the power control slider resets itself every time you press apply... so anyone have a solution? A proper solution would be worth some bit dimes to me.

MSIAfterburner.cfg:

Set it like this:

[ATIADLHAL]
UnofficialOverclockingEULA   = I confirm that I am aware of unofficial overclocking limitations and fully understand that MSI will not provide me any support on it
UnofficialOverclockingMode   = 1


Then you set the settings, close it, reopen it, and it lets you adjust more.

I had to do this a few times to get 300 MHz on the memory clock.

Be fearful when others are greedy, and greedy when others are fearful.

-Warren Buffett
Fuzzy
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June 14, 2011, 05:58:11 AM
 #29

Sure. Here's the exact line from my NewEgg email invoice:

14-102-914   VGA SAPPHIRE|100312SR HD6950 2GB R

And I bought it February 12th. I bought it for gaming, and only discovered bitcoin mining in the last few days. Glad I bought this model! Smiley I'm at work, and it's at home mining 430 MHash/s for me. I only have the stock heatsink/fan, but I keep a regular table fan angled at it.. temps staying steady at 73C @ 1270 mV core voltage. I will keep tweaking it to see if I can get more Mhash/s without heating it up too much.

Using the latest poclbm with GUIminer, CCC 11.5, -v 2 -w 128, 1,000 Mhz core clock and 400 Mhz VRM clock, and most importantly +20% OverDrive from CCC. When I first turned up OverDrive, my MHash/s went from about 335 to 390. Oh, and of course I patched my BIOS to unlock the extra shaders. Overclocking the core and underclocking the memory took me the rest of the way to 430.


What OS are you using XP, Win 7, 32 or 64 bit?
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