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Title: Help: Low Hashrate in a 7850 GPU with CGMiner Post by: vingaard on June 29, 2013, 02:48:15 PM First of all, I'm sorry if I post in a incorrect section (and also I'm sorry for my poor english :-\ )
I have a 7850 GPU running in a i5-2500 (3.30GHz) Windows 7 64 bits machine, and I'm using CGMiner 3.3.1 and I canīt get more than 220 MH/s with next configuration: cgminer.exe -o http://pool.50btc.com:8332 -u **USER** -p **PASSWORD** -I 12 -Q 0 -s 1 -E 5 --thread-concurrency 8192 -g 2 -w 256 I have test a lot of configurations and I can get a slighty higher hass rate whether I increase -I 13 (more of this value the GPU will crash) Could anyone help me with a best configuration for this GPU card? Thanks in advance Title: Re: Help: Low Hashrate in a 7850 GPU with CGMiner Post by: TheSpiral on June 29, 2013, 03:12:28 PM The same thing with -g 1 should get ~310 MH/s.
You also don't need the thread-concurrency for SHA256 mining... Title: Re: Help: Low Hashrate in a 7850 GPU with CGMiner Post by: vingaard on June 29, 2013, 03:18:50 PM Thank you for your answer...
I have test your configuration and I get 213.3 Mh/s... I don't know why?!!! or what I'm doing bad... I have read that this kind of GPU can reach 300 Mh/s, furthermore, with GUIMiner I get 280-300 Mh/s but I can't do the same with cgminer... ??? Anyway, thank you and if you think in other option I will try it. Title: Re: Help: Low Hashrate in a 7850 GPU with CGMiner Post by: TheSpiral on June 29, 2013, 11:15:26 PM Thank you for your answer... Here is my setting for cgminer, it's a bit different than yours (your settings are good for scrypt mining, not SHA mining):I have test your configuration and I get 213.3 Mh/s... I don't know why?!!! or what I'm doing bad... I have read that this kind of GPU can reach 300 Mh/s, furthermore, with GUIMiner I get 280-300 Mh/s but I can't do the same with cgminer... ??? Anyway, thank you and if you think in other option I will try it. Code: cgminer -k poclbm -I 6 -w 256 I run 2 7850's that do 315 MH/s (each) with that exact line. EDIT: So your full line would be: Code: cgminer -k poclbm -I 6 -w 256 -o http://pool.50btc.com:8332 -u **USER** -p **PASSWORD** Title: Re: Help: Low Hashrate in a 7850 GPU with CGMiner Post by: vingaard on June 30, 2013, 12:05:30 AM Thank you very much...
After a little search and another little "try and error" with different parameters I finally setup a configuration file that give me 300 Mh/s average... (and doesn`t crash the GPU...) ;D Quote { "pools" : [ { "url" : "http://pool.50btc.com:8332", "user" : "USER", "pass" : "PASSWORD" } ], "intensity" : "12", "vectors" : "1", "worksize" : "256", "kernel" : "poclbm", "lookup-gap" : "0", "thread-concurrency" : "0", "expiry" : "120", "gpu-threads" : "2", "hotplug" : "5", "log" : "5", "queue" : "1", "scan-time" : "60", "temp-hysteresis" : "3", "shares" : "0", "kernel-path" : "/usr/local/bin" } Anyway, thank you very much for your help and best regards... Thanks again ;) |