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Title: Mining speed of Nvidia GT 640 Post by: tra95 on December 28, 2012, 06:28:07 AM Is it normal for my card to be mining at a max of around 23Mh/s?
I understand that for nvidia cards, I should be using a cuda miner. However, all miners I have tried, poclbm, bfgminer and rpcminer-cuda all hit around 23Mh/s. I have also tried running rpcminer-cuda with -gputhreads 384(384 from here (http://www.geforce.com/hardware/desktop-gpus/geforce-gt-640-oem/specifications), I have a GT 640 128-bit DDR3), but it does not change anything. Title: Re: Mining speed of Nvidia GT 640 Post by: John (John K.) on December 28, 2012, 06:46:23 AM I'm not too sure about that specific card (you'll have to consult the hardware wiki for that), but Nvidia cards are generally slow and inefficient in Bitcoin mining.
Title: Re: Mining speed of Nvidia GT 640 Post by: tra95 on December 28, 2012, 06:52:50 AM I know nvidia isnt the best, just trying this out. I have checked the wiki and googled, there is no mention of my card anywhere :/
Title: Re: Mining speed of Nvidia GT 640 Post by: John (John K.) on December 28, 2012, 07:43:46 AM Looking at hardware comparisons, 23MH/s for a 640 seems on par. A 540 gets like 16 MH/s so ...
Title: Re: Mining speed of Nvidia GT 640 Post by: tra95 on December 28, 2012, 08:21:57 AM I see...alright. Just curious, because I know a 560 gets 75~MH/s.
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