LTC mining with Reaper on a 7970 - page 3.

Tomatocage

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brb keeping up with the Kardashians

Quote from: meebs on September 28, 2012, 09:51:34 PM

Tacotime is responsible for me being able to get 550-590 out of my 7950 using this: PLEASE note that running this setup on a card connected to your monitor WILL make the computer nearly unusable. The screen will literally refresh only once every 2-3 seconds. If it is on a computer you are "remoting" into, it'll be fine. Also, running the monitor on another card or IGP you'll be fine to. Also, reaper will consume 1.5gb of system ram and gpu ram PER card.

worksize 256
vectors 1
aggression 20
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 24576

Hmm, thanks. I still can't get past my inability to use anything beyond 8192 for gpu_thread_concurrency in litecoin.conf. Is there any other file I should be editing? My reaper.conf file looks like this:

kernel reaper.cl
save_binaries yes
enable_graceful_shutdown no
long_polling yes

device 0

worksize 256
aggression 13
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 8192
long_polling yes

mine litecoin

tacotime

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Activity: 1484

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The memory bus is the same size for the 7970, so use threads = 1 and thread concurrency = 384 * 64 = 24576, aggression 20.

Words like "personally" mean that's what I got, and that your mileage may vary. You can get 700kh/s on a 7950 though, so I'm not sure why anyone would think getting that much from a 7970 would be difficult.

meebs

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Quote from: superfastkyle on September 28, 2012, 09:28:17 PM

only tacotime and he is probably just trolling you. its usually a good sign of lying when people use interjection words like personally, honestly, seriously etc Its using language to "prove" a lie to yourself so you will have an easier time making other people believe it.

Quote from: Tomatocage on September 28, 2012, 02:46:56 AM

Anybody with a 7970 getting 650-700 kh/s out of their cards? Could you post your exact litecoin.conf file (minus your miner info, of course)? Also, what is recommended for core/mem clock to hit those numbers? Thanks.

Tacotime is responsible for me being able to get 550-590 out of my 7950 using this: PLEASE note that running this setup on a card connected to your monitor WILL make the computer nearly unusable. The screen will literally refresh only once every 2-3 seconds. If it is on a computer you are "remoting" into, it'll be fine. Also, running the monitor on another card or IGP you'll be fine to. Also, reaper will consume 1.5gb of system ram and gpu ram PER card.

worksize 256
vectors 1
aggression 20
threads_per_gpu 1
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 24576

superfastkyle

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Activity: 437

Merit: 250

only tacotime and he is probably just trolling you. its usually a good sign of lying when people use interjection words like personally, honestly, seriously etc Its using language to "prove" a lie to yourself so you will have an easier time making other people believe it.

Quote from: Tomatocage on September 28, 2012, 02:46:56 AM

Anybody with a 7970 getting 650-700 kh/s out of their cards? Could you post your exact litecoin.conf file (minus your miner info, of course)? Also, what is recommended for core/mem clock to hit those numbers? Thanks.

Tomatocage

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Activity: 1554

Merit: 1222

brb keeping up with the Kardashians

Anybody with a 7970 getting 650-700 kh/s out of their cards? Could you post your exact litecoin.conf file (minus your miner info, of course)? Also, what is recommended for core/mem clock to hit those numbers? Thanks.

Tomatocage

legendary

Activity: 1554

Merit: 1222

brb keeping up with the Kardashians

Quote from: philips on September 28, 2012, 01:25:54 AM

Quote

Thanks... but anything I try that yields a buffer size over 512MB doesn't work. My card is supposed to have 3GB too :-/

Have you tried the GPU_MAX_ALLOC_PERCENT variable?

This sounded promising, but alas it doesn't appear to allow me to go beyond 8192 for the gpu_thread_concurrency

Tomatocage

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brb keeping up with the Kardashians

Quote from: tacotime on September 28, 2012, 01:10:38 AM

change thread_per_gpu to 1

I've played around with this setting from 1 to 5, and it doesn't affect my problem at all Sad

philips

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Quote

Thanks... but anything I try that yields a buffer size over 512MB doesn't work. My card is supposed to have 3GB too :-/

Have you tried the GPU_MAX_ALLOC_PERCENT variable?

tacotime

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change thread_per_gpu to 1

Tomatocage

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Merit: 1222

brb keeping up with the Kardashians

Quote from: meebs on September 27, 2012, 10:51:18 PM

Quote from: Tomatocage on September 26, 2012, 07:33:01 PM

Quote from: tacotime on September 26, 2012, 06:57:32 PM

Quote from: Tomatocage on September 26, 2012, 05:57:49 PM

Interesting. I'm getting the same error in Reaper as well when I go above 8192.

Your thread concurrency needs to be a multiple of 64, but otherwise any thread_concurrency within the memory size should work.

Thanks... but anything I try that yields a buffer size over 512MB doesn't work. My card is supposed to have 3GB too :-/

What is an example of something that didnt work for you?

The setup I run on my 7950 uses 1.5gb on each of my cards and 3gb of system ram.

Make sure you have lots of system ram ready available.

worksize 256
vectors 1
aggression 13
threads_per_gpu 4
sharethreads 32
lookup_gap 2
gpu_thread_concurrency 8192

I'm seeing only 2Gb out of 6Gb total system ram being used right now. Anything beyond 8192 for gpu_thread_concurrency yields an error:

LTC buffer size: 1024MB.
Buffer too big: allocation failed. Either raise 'lookup_gap' or lower 'gpu_thread_concurrency'.

meebs

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Quote from: Tomatocage on September 26, 2012, 07:33:01 PM

Quote from: tacotime on September 26, 2012, 06:57:32 PM

Quote from: Tomatocage on September 26, 2012, 05:57:49 PM

Interesting. I'm getting the same error in Reaper as well when I go above 8192.

Your thread concurrency needs to be a multiple of 64, but otherwise any thread_concurrency within the memory size should work.

Thanks... but anything I try that yields a buffer size over 512MB doesn't work. My card is supposed to have 3GB too :-/

What is an example of something that didnt work for you?

The setup I run on my 7950 uses 1.5gb on each of my cards and 3gb of system ram.

Make sure you have lots of system ram ready available.

Tomatocage

legendary

Activity: 1554

Merit: 1222

brb keeping up with the Kardashians

Quote from: tacotime on September 26, 2012, 06:57:32 PM

Quote from: Tomatocage on September 26, 2012, 05:57:49 PM

Interesting. I'm getting the same error in Reaper as well when I go above 8192.

Your thread concurrency needs to be a multiple of 64, but otherwise any thread_concurrency within the memory size should work.

Thanks... but anything I try that yields a buffer size over 512MB doesn't work. My card is supposed to have 3GB too :-/

tacotime

legendary

Activity: 1484

Merit: 1005

Quote from: Tomatocage on September 26, 2012, 05:57:49 PM

Interesting. I'm getting the same error in Reaper as well when I go above 8192.

Your thread concurrency needs to be a multiple of 64, but otherwise any thread_concurrency within the memory size should work.

Tomatocage

legendary

Activity: 1554

Merit: 1222

brb keeping up with the Kardashians

Quote from: tacotime on September 25, 2012, 12:30:44 PM

1GHz core / 1450mhz RAM

if i don't set flags i lose performance

cgminer is setting the thread concurrency with --shader to ~8192, which is too small. cgminer has a bug where it can't use thread concurrencies over 8192 (gives a memory size error). in order to achieve max hashing rates for a 7xxx series card you need to set the concurrency to 64 * (memory bus size in bits).

in the meantime i'm getting 550kh/s in reaper and finding blocks

Interesting. I'm getting the same error in Reaper as well when I go above 8192.

Liquid

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Crypto Somnium

1000Mhz

live627

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Quote from: Liquid on September 25, 2012, 10:18:27 AM

800Mhz

May I also know the memory clock?

tacotime

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Quote from: Greedi on September 25, 2012, 11:50:55 AM

in what O/C ? if you'r doing that

also, you don't need -w and -v

1GHz core / 1450mhz RAM

if i don't set flags i lose performance

cgminer is setting the thread concurrency with --shader to ~8192, which is too small. cgminer has a bug where it can't use thread concurrencies over 8192 (gives a memory size error). in order to achieve max hashing rates for a 7xxx series card you need to set the concurrency to 64 * (memory bus size in bits).

in the meantime i'm getting 550kh/s in reaper and finding blocks

Greedi

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Activity: 266

Merit: 250