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Title: 7970 litecoin hashrate problem. Post by: sweeppicking on April 17, 2013, 11:27:24 PM Hi every one! i'm new in the forum, i read a LOT of info about how to config a 7970 to achieve the +700khs in litecoin mining.
I have 3 sapphire 7970 in CF, one reference PCB and two Dual X dual DVI. After searching so much info about it, i seems like is so hard to push this card to the limit, some people can get 720khs with the sapphire Dual x cards. I see that i need to use -g 2 and find the exact relation with GPU engine and memmclock to rise the hash, but still i can't get more of 650 khs. I have a watercooled system for the cards and i'm runing it with a FX 8350 in 5ghz. I also read the CGminer Scrypt Read me and this was what i done: i can't use Intensity more or less than 13, if i use >13 my hashes go down, if i use <13 same. Thread concurrency only make me need more GPU engine to get the same hash. So, can anyone help me with this? I think so many paople has the exact same problem. Thanks for all and sorry for bad english. Title: Re: 7970 litecoin hashrate problem. Post by: blastbob on April 17, 2013, 11:34:26 PM This works very well for me, stable around 75C@2100RPM on all adapters (ASUS Radeon HD 7970 3GB GDDR5 - DirectCU II TOP)
The card hash result differ from the cards i have in windows vs linux. Linux seems be a little better on this. Quote cgminer --scrypt -o stratum+tcp://pool -u user -p pass --worksize 256 -g 2 -I 13 --lookup-gap 2 --gpu-engine 1065 --gpu-memclock 1500 --shaders 2048 Title: Re: 7970 litecoin hashrate problem. Post by: sweeppicking on April 17, 2013, 11:38:12 PM This works very well for me, stable around 75C@2100RPM on all adapters (ASUS Radeon HD 7970 3GB GDDR5 - DirectCU II TOP) The card hash result differ from the cards i have in windows vs linux. Linux seems be a little better on this. Quote cgminer --scrypt -o stratum+tcp://pool -u user -p pass --worksize 256 -g 2 -I 13 --lookup-gap 2 --gpu-engine 1065 --gpu-memclock 1500 --shaders 2048 You aren't using thread concurrency, what is your hash rate? Why you use that engine/memmory config and how you find it? Title: Re: 7970 litecoin hashrate problem. Post by: blastbob on April 17, 2013, 11:41:41 PM I usually gets lower output when i mess with threads.
I am getting ~720 on linux and ~660 on windows 7 64 The engine memory part is what i found worked best for me. I can tune it a little higher, but i got some unstability and noise problems :) Make sure you use the latest cgminer, 2.11.4 it should be. Title: Re: 7970 litecoin hashrate problem. Post by: hakushka on May 08, 2013, 11:01:39 PM 1043/1500 gives me about 733 KHash (cgminer 2.11.4 or 3.1 does not matter)
Title: Re: 7970 litecoin hashrate problem. Post by: JimmyFL on May 08, 2013, 11:04:12 PM --shaders 2048 --thread-concurrency 8192 -I 13 -g 2 -w 256 --auto-fan --gpu-engine 1080 --gpu-memclock 1500 --temp-overheat 80
==> 750kh/s, max 73C (windows) |