Low hash rate on 7970

[raptor]

As a previous Bitcoin miner moving to Litecoin, I have to say, many things confuse me. Although googling has fixed many of my problems, I still can't get my hash rate up.  Why can I average 690 MH/s on Bitcoin, but can barely get 525 KH/s on Litecoin? By my research, a 7970 should at least get 600 KH/s at stock settings. 

 

 

Any advice would be appreciated. 

 

 

[jasonharty24]

What brand of card is it if I may ask? http://litecoin.info/Mining_Hardware_Comparison shows some good settings you could try out with your 7970. unlike bitcoin mining where the Memory Clock is not really needed to have a high hashrate it is quite important for Litecoin mining and on this website you will see a lot of higher Memory Clock speeds giving higher numbers.

 

Try increasing your Memory clock speed on your current setup or decrease your core speed and see if that helps.

[raptor]

What brand of card is it if I may ask? http://litecoin.info/Mining_Hardware_Comparison shows some good settings you could try out with your 7970. unlike bitcoin mining where the Memory Clock is not really needed to have a high hashrate it is quite important for Litecoin mining and on this website you will see a lot of higher Memory Clock speeds giving higher numbers.

 

Try increasing your Memory clock speed on your current setup or decrease your core speed and see if that helps.

 

I have pushed the memory up to 1900 MHz, and that seems stable. I kept the core clock at 1050 MHz. Now I am up to 592 KH/s. This is a MSI Reference card with a Artic Xtreme cooler to keep the noise and temp in check. 

 

Is there anything else I should try to increase my mining power? 

[jasonharty24]

For extra flags try:--lookup-gap 2 --shaders 2048

See if that helps you at all.

[dalekphalm]

I would also try adjusting your Intensity, as well as the Thread Concurrency.

 

I-13 is great if you're fully using the computer while its mining, but when you're NOT mining, you can push that up, possibly right up to I-20. It'll make your computer pretty much unusable, but it should push your Khash/s rate up even higher.

[RuecanOnRails]

Try these settings.

 

1075 core

1750 mem

thread concurrency 11264

gpu threads 2

intensity 13

 

 

And personally I'd advise against using a GUI miner. They really lack the finesse required for in-depth tweaking and testing. Even though it's running just as a shell for an actual miner, it limits a lot of things.

[pGuerrerox]

Try -g 2 as advise above, try to use cgminer is a better and more customizable/tweakable.