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Hello I have a rig with 3x 7970, Gigabyte GV-R7970C-3GD...

I have tried everything on the internet to get these cards working at 650+, actually they won't mine above 580 kh/s...
I have noticed a strange thing running settings that people over here post... I would usually get more kh/s if I remove the -g 2 !
Which people say is needed for speeds over 700 kh/s.. I have Catalyst 13.4, latest App SDK 2.8.

Quite annoying thing, I have spent more than 10 hours trying to set it up but no progress so far !

Currently running  at 550 kh/s using  stock settings at -I 13

What's your thread concurrency?  How much ram does your system have, and how much usable do you have if you  right click on my computer and click properties?

GPU: 1030
MEM: 1750

-I 13 --shaders 2048 -g 2 -w 256

Core 1100, Mem 1500

I can get 775kh/s

Try engine at 1080 and memory at 1500.

thread-concurrency at 8192
lookup-gap at 2

and (very important):

gpu-threads at 2.

This is very interesting, because over 1085, my impression was that the performance drops.

What speed has rate do you get that way?

I flashed the bios of gigabyte 7950 to my 7970 :D

Sorry, 725 kh/s on most of my 7970s.

Did you try 1050/1500 or 1080/1500 (on Gigabyte 7970OC)?

Are you getting any better results (with 8192 thread concurrency)?

I see. What version of bios did you use?

X03

Huh? I do not see that here:

http://www.gigabyte.com/products/product-page.aspx?pid=4102#bios

TC 8192, I have 8 Gb ram on win 7 64 bit

hmm I got to 640 with :
 --thread-concurrency 8192 -I 13 -w 256 --shaders 2048 --lookup-gap 2 -g2
Core running 915 and Memory @ 1600

if by gpu threads you mean -g 2 ! I have the cards running at these settings getting 400 kh/s

Crashed !! at those settings

--thread-concurrency 8192 -I 13 -w 256 -g 2

remember to delete the scrypt file .bin in cgminer folder before trying the new settings

I'll try it out tomorrow. :)

Has anyone ever figured out how to unlock voltage on these rev. 2 cards? Really wish I could under volt them.

It is possible to flash them with modded BIOS. The question is whether they will remain stable at a lower voltage.

Do you have a link to this BIOS, please? I've got 16 7970s, the only ones that aren't under volted is these 2 GB cards, plus an Asus DCII which is also voltage locked. I saved about 600w of electricity by under volting all of my cards. :) Takes a lot of patience and testing to find the minimum voltage they will run on 24/7 stable.

I tired every setting here my best was --thread-concurrency -w 256 -g 2 --lookup-gap 2
Core at 915 Memory at 1600, gets me 640 kh/s... How come you guys have the same card and same settings doesn't work ???

What is your card's manufacturer?

I have this card

http://www.gigabyte.com/products/product-page.aspx?pid=4102#bios

Even this setting isn't stable !

Do you have a single card?

What happens if you lower the memory to 1500 and increase the core to 1000 or 1050?

Can you paste your cgminer.conf?

I am now running at Core 866 and Memory 1500, getting 610 kh/s per card... Since Memory at 1600 led the card to crash after 1 mins.
No I have 3 cards. And I don't have a cgminer.conf in the directory, I run a bat file.

-I 13 --thread-concurrency 8192 --gpu-engine 866 --gpu-memclock 1500 --auto-fan -w 256 --shaders 2048 -g 2 --lookup-gap 2

Runs between 400-500

Leave shaders alone. And why do you run you mem so much higher than core? And up the -i untill the driver crashes and come back 1 level. The cards are playing chess with each-other at -i 13. Leave 13 on you card which is used for display and go up on the others. Your .bat should look like -i x,x,13 or 13,x,x depending which GPU u use for display. Spending 10 hours on the setting is not a lot. What happends if you run core=mem=1000?

I never use this pc, its made solely for mining also most people with 7970 at mining with much higher rates at -I 13....

The question is do you have/mined on a 7970?? because your post doesn't make any sense !!

i get 725-740 on all my 7970 gigabyte i have 7 of them

i use 1085/1500 i13 TC 8132 w256

your problem is and i  have it before is the driver

try it with catalyst 13.1

let me know how that works

Try this:
-I 13 --thread-concurrency 8192 --gpu-engine 1000 --gpu-memclock 1500 --auto-fan -w 256 --shaders 2048 -g 2 --lookup-gap 2

440 kh/s  :( :(

Just to confirm: Do you have --scrypt somewhere in your command? How long do you let it run before you read the speed?

What happens if you try this one:

-I 13 --thread-concurrency 8192 --gpu-engine 1080 --gpu-memclock 1500 --auto-fan -w 256 --shaders 2048 -g 2 --lookup-gap 2

Try this:

--scrypt -I 13 --thread-concurrency 8192 --gpu-engine 1080 --gpu-memclock 1500 --auto-fan -v 1 -w 256 --shaders 2048 -g 2 --lookup-gap 2

I will admit I have not. Have you tried i>13 or just read about it? On every 7xxx card I've tried it increases the hashes. Is 7970 the spoiled child of the 7 family and it only likes 13? ;D
What exactly in my post doesn't make sense?

Yes, I let it run for 30-60 secs then it appears to top... Thanks for your help, I think I caught the problem which is the drivers !!
Will try the new drivers tomorrow since I need to sleep..
And again thanks for helping !

I would leave it for 5 minutes if you want to be sure about the hash rate.

HIS 7970 Flash bios 7950

GPU   1050  MEM  1250  Vol 1075

-I 13 --TC 8192 -g 2 -w 256  =>  73x KH/s

As far as I understand, however, we are talking here about a Gigabyte 7970 card:

http://www.gigabyte.com/products/product-page.aspx?pid=4102#bios

Downloaded Catalyst 13.1, tried all the settings in the thread again it never goes above 700 ... :(

Did you also try Catalyst 13.4?  (Or was it what you were having trouble with earlier?)

Yesterday I tried catalyst 13.4 and today 13.1, seems strange because some guy told me he has the same cards :S...

Which OS do you use?

If I were you, I would try Linux (a clean install) just to eliminate other possible causes of the problem.

Yea I'll check a linux tutorial and do it maybe later next week.... 12 hours a week is enough for me :)

I have the same problem with a very similar card.

Card is Gigabyte 7970 Ghz edition.

In addition to what Benjie did, I also flashed the 7970 OC version, switched to Linux, changed memory, removed one GPU card, switched to all Catalysty 12.8, 13.1, 13.4, 13.5 (beta) , 13.6 (beta), and SDK 2.7 and SDK 2.8, cgminer 3.11.2 till 3.2.2.

Still I can't get more than 540 kh/s.

what kind of psu are you using and how many gpus per rig?

Lol. My 7970 runs average of 750 KH...

Cgminer 3.1

cgminer.exe --scrypt -o stratum+tcp://xxxxxxx -u xxxxx -p xxxxx -I 13 -g 2 -w 256 --thread-concurrency 8192 --gpu-powertune 20

Ok, then your cards/system doesn't deal too well with -g 2

Try: -g 1 --thread-concurrency 24000

Use the bins from: https://forum.litecoin.net/index.php?topic=6058.0, for a bit higher hashrate and test the various --thread-concurrency

Anybody solved issue with 7970 ? I am running on 500 kHs. When I change gpu-threads from 1 to 2, it decrease cards to 300 kHs.

Do a search in this forum on how to flash the bios on 7970's. I've have 7970's that ran at 340kHs at intensity 13 and gpu threads 2. After flashing the bios on the cards they are running at 720kHs.

I already tried to flash bios. I have non OC version of this card (SAPPHIRE HD 7970 VAPOR-X GHZ Edition). When I flash recommended OC version, card will stop working and not start.
What version of GPU you have ?