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Title: Please help with HD6870 Settings Post by: jmsmackdown on March 01, 2014, 06:15:58 AM Hey I have an HD6870 and am mining vertcoin (so the kh is half of other coins I believe)
So far, I can get 100kh with the following settings: vertminer.exe --scrypt-vert -o stratum+tcp://xxxxxxxx -u xxxx.xxxxx -p x --thread-concurrency 4480 -I 13 If I turn up my intensity, I can get it up to about 140 but the GPU gets way too hot (like 80-85 degrees) Others have suggested that I play around with the thread concurrency in multiples of 64 but if I put anything other than 4480 in, my speed drops to 18kh I tried it at the following tc levels and every one of them drops the speed top about 18kh: 5760, 6400, 8192 ,6720 Also, sometimes I notice after I close and start up the miner later that even my 4480 (that I get 100kh) with will drop to 15-18 until I restart my computer. Unfortunately, trying these other thread-concurrencys after a fresh restart doesn't do anything to raise the kh I am confused why this happens to even my good settings and if its related to my issue of other tcs never getting over 20kh. Any advice on this or how I can get it more up to the 125-130 range while keeping my GPU temp down would be greatly appreciated. Thank you Title: Re: Please help with HD6870 Settings Post by: jmsmackdown on March 01, 2014, 11:37:59 PM bump
jjfg Title: Re: Please help with HD6870 Settings Post by: jmsmackdown on March 02, 2014, 09:43:54 AM Title: Re: Please help with HD6870 Settings Post by: angelis83lt on April 12, 2014, 03:51:16 AM Heya,
I like you was having some issues getting things going. I have both a Sapphire R9 270 and an XFX HD6870. My biggest issue was the 270. still have not gotten that straight ye. I think more can be squeezed out of it than the 210Kh/s For you though, the 6870 I have going is running at 140Kh/s to 150Kh/s average. I am also not getting Any HW errors at all and it has been running for 26 hours now. The first thing I would have to say is to download "thekev vertminer" from https://bitcointalk.org/index.php?topic=466867.0 This solved quite a few issues for me, as the 0.5.3 was not letting my cards really work as they should (270 issues) here is the Bat Quote @echo off setx GPU_MAX_ALLOC_PERCENT 100 setx GPU_USE_SYNC_OBJECTS 1 COLOR 0C timeout /t 4 vertminer.exe pause and here is the Config Quote { "pools" : [ { "url" : " ", "user" : " ", "pass" : " " } ] , "rawintensity" : "65536", "worksize" : "128", "lookup-gap" : "2", "thread-concurrency" : "4480", "gpu-threads" : "1", "temp-cutoff" : "90", "expiry" : "30", "log" : "5", "queue" : "0", "scan-time" : "1", "device" : "0", "shaders" : "1120", "scrypt-vert" : true } as You can see above, the rawintensity setting is a large number, but it seems to work without any issue. I have the gpu sitting at stock settings with the exception of the fans being pushed to 100 to keep it cool. GPU settings are gpu = 900 mem=1050. May play around with an overclock once my new case fans arrive. Also Note that the worksize is at 128. it can not be higher for the 6870 I have found. The Miner will not start if it is. Also with the random low hashrates, I have that issue as well sometimes. I generally just Logout of windows and log back in and all is good again. I do not thing it is an uncommon issue. Hope this helps some. I am still playing with it, but the hashrate is not bad at all I think for a 6870 |