7970 LTC mining !

[Prelude]

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.

[Benjie]

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

[drlukacs]

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?

[Benjie]

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

[Benjie]

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 !

[drlukacs]

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?

[Benjie]

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

[Benjie]

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

Runs between 400-500

[gica_contra]

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?

[Benjie]

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 !!

[ryanb]

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

[drlukacs]

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

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

[Benjie]

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

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 

[drlukacs]

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

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

[drlukacs]

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

[gica_contra]

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 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?
What exactly in my post doesn't make sense?

[Benjie]

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

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 !

[drlukacs]

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

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.

[Xuxu911]

HIS 7970 Flash bios 7950

GPU   1050  MEM  1250  Vol 1075

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

[drlukacs]

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