Bitcoin Forum

Hi all,

I have a computer with 2 cards in it. A 7970 and a 6950.

I am running GUI Miner CG Miner lite coin edit and am mining litecoins from a pool.

Heres the problem, when I run and mine on both I get the results

7970: 600+ hashes
6950: 400+ hashes

The problem is for the 7970 the shares are not being accepted on the pool while the 6950 is just fine.

I found one solution was to change the GPU Thread from 1 to 2 for the 7970. Shares started being accepted but another problem occured.
The 7970 started running between 200-400 hashes.

Any ideas or help greatly appreciated.

Just wanted to add on to help people understand what I need help with.


Scenario 1:

7970 Mining 1 Card only -  600+ hashes, accepted shares, PERFECT NO PROBLEM

Scenario 2:

2 Cards running
7970- 600+ hashes, NO shares accepted 0%
6950 - 400+ hashes, shares accepted, everything fine on this part

Scenario 3:

I changed the GPU Thread for 7970 from 1 to 2.
7970 - 200 to 400 hashes, shares accepted now
6950 - 400+ hashes, no changes made to the 6950 settings.


What I am trying to achieve is:
7970 - 600+ hashes with accepted shares
6950 - 400+ hashes with accepted shares.

Hope this is clear.

Thanks

Hmm I have a 7970 and multiple 6950's running.  Could you give what configs you are using?

I'm using GUI Miner Scypt litecoin edit

using CG Miner as my miner


I pick the default CG Miner 7970
Thread Concurrency 8192
Vectors 1
GPU Threads 1
Worksize 256
Intensity 18

At this setting it runs fine, 600-650 hashes BUT NO SHARES ACCEPTED

Now same thing,

CG Miner 7970
Thread Concurrency 8192
Vectors 1
GPU Threads 2
Worksize 256
Intensity 18

Only difference is changing GPU thread to 2.


NOW it works shares are accepted, BUT it works at 200-400 hashes basically a HUGE drop in performance.

The other card meanwhile, the 6950 also in the same computer, is running perfectly with no other tweaks, stock completely, no overclocking or other modifications.

a little more info

so other than those settings specified, i haven't done anything else (overclocking or memory tweaking etc.)

and if this helps

i am using this pool using stratum also.

stratum.give-me-ltc.com:3333


thanks for your time

Are you running the 7970 and 6950 on 1 rig also?

What is your configuration / miner that you are using and the settings?

Thank you sir.

I had similar problem, it was in bitcoin pools side and soon as i switched to different pool it started accepting shares.

I don't think its the pool.

If I mine with the 7970 alone it hashes and gets shares accepted.

If I mine with the 6950 alone it hashes and get shares accepted.

The problem is if I mine with both the 7970 and 6950, the 7970 does not get any shares accepted.

I can fix this temporarily by setting 7970's GPU Thread to 2. However, The hash rate goes from 600+ to under 400 for the 7970.

Can you plase share your settings for the 6950? thanks