7970 LTC mining !

[Benjie]

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

[Gleason]

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?

[Prelude]

GPU: 1030
MEM: 1750

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

[stevenlam]

Core 1100, Mem 1500

I can get 775kh/s

[drlukacs]

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

Try engine at 1080 and memory at 1500.

thread-concurrency at 8192
lookup-gap at 2

and (very important):

gpu-threads at 2.

[drlukacs]

Core 1100, Mem 1500

I can get 775kh/s

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

[drlukacs]

GPU: 1030
MEM: 1750

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

What speed has rate do you get that way?

[stevenlam]

Core 1100, Mem 1500

I can get 775kh/s

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

I flashed the bios of gigabyte 7950 to my 7970

[Prelude]

GPU: 1030
MEM: 1750

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

What speed has rate do you get that way?

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

[drlukacs]

GPU: 1030
MEM: 1750

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

What speed has rate do you get that way?

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)?

[drlukacs]

I flashed the bios of gigabyte 7950 to my 7970

I see. What version of bios did you use?

[stevenlam]

X03

[drlukacs]

X03

Huh? I do not see that here:

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

[Benjie]

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?

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

[Benjie]

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

[Benjie]

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

Try engine at 1080 and memory at 1500.

thread-concurrency at 8192
lookup-gap at 2

and (very important):

gpu-threads at 2.

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

[Benjie]

GPU: 1030
MEM: 1750

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

Crashed !! at those settings

[stevenlam]

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

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

[Prelude]

GPU: 1030
MEM: 1750

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

What speed has rate do you get that way?

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'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.

[drlukacs]

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.