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Author Topic: 7970 will only mine at 550khash at stock clocks - Lower when OC'ed - HELP  (Read 4797 times)
Marrs
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April 13, 2013, 12:19:06 AM
 #41

Your pool calculates your hash rate based on the work it accepts. It doesn't count the stales.

Stales are a pool issue. Try a different one.
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iruleeveryone28
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April 13, 2013, 12:29:45 AM
 #42

Your pool calculates your hash rate based on the work it accepts. It doesn't count the stales.

Stales are a pool issue. Try a different one.


thanks for the info, may be a coincidence but at lower hash rates the numbers coinceded
peacefulmind
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April 13, 2013, 12:57:21 AM
 #43

I had a thread going about this issue as well.

It is here and may have some useful info -     
Lets Solve the unreliable 7970 issues.... (share your observations/input) - https://bitcointalk.org/index.php?topic=174036.0

Frankly the most frustrating aspects of this are two things, inability to duplicate results across different brands/versions of 7970s, and absolute non-linear results.  One card 1022/1244 might get 650k, 1022/1450 get 400k, and 1048/1720 get 720k.

They are the fastest cards but something tells me there is some sort of bug we have not found - for example most other cards show little performance variation and there are formulaic settings that can be plugged into any card to get close to max result.

Not so for 7970.  I still have 2 that are fubar.  I don't think I will ever get either one above 600k 24/7.

Quote from: FrictionlessCoin
"I think you are to hung up on this notion about 'pre-mining' being a No-No."
- from journeys into the dark depths of the alt coin forum....
matauc12
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April 13, 2013, 12:58:12 AM
 #44

right getting good hasrates now, but it seems theres a lot of stales, and my pool is returning a ~20-30% lower return than is quoted on my computer. what can be causing this?
HW errors will often be caused by too high/low thread concurrency or GPU threads. Play with those.

0 HW errors.. but ill try thread concurrency etc. increase concurrency by 128 increments? 12000 g2 and 24000 g2 dont work for me

If its not HW errors, perhaps try different ports that your pool accepts or try a different pool (at least just to test).

24000 g2 shouldn't work for anyone. 12000 g2 doesn't for everyone, although I found a little bug for that config to work you must first run g1 then close, then g2.

If you're getting good rates and stales (not errors) you're on the right path. Means hardware config is right, now onto network Tongue. Thankfully, network is pretty much limited to pool config.
Marrs
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April 13, 2013, 01:13:50 AM
 #45

I had a thread going about this issue as well.

It is here and may have some useful info -     
Lets Solve the unreliable 7970 issues.... (share your observations/input) - https://bitcointalk.org/index.php?topic=174036.0

Frankly the most frustrating aspects of this are two things, inability to duplicate results across different brands/versions of 7970s, and absolute non-linear results.  One card 1022/1244 might get 650k, 1022/1450 get 400k, and 1048/1720 get 720k.

They are the fastest cards but something tells me there is some sort of bug we have not found - for example most other cards show little performance variation and there are formulaic settings that can be plugged into any card to get close to max result.

Not so for 7970.  I still have 2 that are fubar.  I don't think I will ever get either one above 600k 24/7.

It's like a gearbox, with the core, memory speed, thread concurrency, gpu threads, and who knows what else, all as separate gears. If you don't have quite the ought ratio on any of the moing pieces, your hash rate suffers.

matauc12
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April 13, 2013, 01:39:00 AM
 #46

I had a thread going about this issue as well.

It is here and may have some useful info -     
Lets Solve the unreliable 7970 issues.... (share your observations/input) - https://bitcointalk.org/index.php?topic=174036.0

Frankly the most frustrating aspects of this are two things, inability to duplicate results across different brands/versions of 7970s, and absolute non-linear results.  One card 1022/1244 might get 650k, 1022/1450 get 400k, and 1048/1720 get 720k.

They are the fastest cards but something tells me there is some sort of bug we have not found - for example most other cards show little performance variation and there are formulaic settings that can be plugged into any card to get close to max result.

Not so for 7970.  I still have 2 that are fubar.  I don't think I will ever get either one above 600k 24/7.
I used to believe the 7970 wasn't at full potential in the 750khs range for similar reasons, also since it seems more powerful than the difference in hash it gives. So always thought it might be miner optimization that would unlock its potential.

Recently though I have been getting hints towards the memory bus being the bottleneck. We can extropolate that from the Tahiti LE only getting 400khs because of its 256bus.
iruleeveryone28
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April 13, 2013, 02:48:50 AM
 #47

I had a thread going about this issue as well.

It is here and may have some useful info -     
Lets Solve the unreliable 7970 issues.... (share your observations/input) - https://bitcointalk.org/index.php?topic=174036.0

Frankly the most frustrating aspects of this are two things, inability to duplicate results across different brands/versions of 7970s, and absolute non-linear results.  One card 1022/1244 might get 650k, 1022/1450 get 400k, and 1048/1720 get 720k.

They are the fastest cards but something tells me there is some sort of bug we have not found - for example most other cards show little performance variation and there are formulaic settings that can be plugged into any card to get close to max result.

Not so for 7970.  I still have 2 that are fubar.  I don't think I will ever get either one above 600k 24/7.

helpfull, thanks
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