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Title: Gigabyte 7970 advice Post by: mx19 on January 04, 2014, 04:07:28 PM Hey guys,
a couple of us have been mining altcoins for a while now and i have been messing around with settings but cannot seem to get over 680kh/s per card!! Info on the rig: 4x gigabyte 7970 GV-R797OC-3GD rev2.1 8gb Ram Processor AMD FX(tm)-4100 Quad-Core Processor, 3612 Mhz, 2 Core(s), 4 Logical Processor(s) Motherboard Running windows 7 64bit. I am running cgminer 3.7.2 with the following .bat file (after trying various combinations, this seems to give the highest hashrate): setx GPU_MAX_ALLOC_PERCENT 100 setx GPU_USE_SYNC_OBJECTS 1 timeout /t 180 C:\Users\Miner\Downloads\cgminer-3.7.2-windows\cgminer-3.7.2-windows\cgminer.exe --scrypt --url stratum+tcp://eac.us1.hackshard.com:3333 -u x -p x --intensity 13 --gpu-engine 955,955,971,971 --gpu-memclock 1500 --thread-concurrency 8192 --auto-fan --worksize 256 -g 2 -v 1 --lookup-gap 2 Can anybody see something i am missing that is denying me the 700+kh/s that people seem to be getting? Any help is greatly appreciated!!! Thanks Title: Re: Gigabyte 7970 advice Post by: Gamer67 on January 04, 2014, 04:15:18 PM Your core clocks are too low and mem clock could go higher too.
Core should be 1050 and up. Clock your mem as high as it will go stable. I use 1130/1750 and it nets me 788 on two cards. http://i40.tinypic.com/fldk7t.png Title: Re: Gigabyte 7970 advice Post by: mx19 on January 04, 2014, 04:35:45 PM Thanks for your reply...
What cards do you use? I will try changing the clocks again but if i go any higher on core clock at the moment then hashrate quickly drops! any thoughts as to why? Your voltage is slightly different aswell, i am hesitant to change this but is it something you have done? cheers Title: Re: Gigabyte 7970 advice Post by: mx19 on January 04, 2014, 05:29:26 PM So i just tried again with the clocks, i got to 1600 before it crashed so restarted with 1575mem, then i only got to 825core before it went unstable... i just cannot seem to get anywhere near the clocks people are recommending...
With 1500 mem I go up in increments of 5 until the hashrate crashes then decrease by 1 until it is at its optimal which are the clocks i posted earlier... |
