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Title: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: The Mafia on May 15, 2013, 09:55:31 AM Hi Everyone
I am having a really annoying problem with litecoin mining. I have a PC with these specs (And other variants to test hardware): Core2Duo 1.8ghz or Intel 1366 1.86ghz Xeon Processor Intel 975bx Chipset Mainboard or Gigabyte X58A Mainboard Corsair 1050watt PSU Seagate Hard disk 2 x 5870s & 1 x 7970 or 1 x 7970 & 1 x 5870 or 1 x 7970 & 1 x 7950 Software: Windows 7 64bit Windows 8 64bit cgminer 3.11, 3.0,2.11, 2.10, 2.9, 2.8, 2.7, 2.6, 2.5 2.4 AMD SDK 2.8 and above AMD Video Drivers 12.8, 13.1, 13.4 I simply cannot run more than one card plugged in, or CGminer runs hundeds or thousands of HW errors, and doesn't submit any shares. As you can see, I have tried so many different combinations. When I run cgminer 3.11 and mine bitcoin, all cards hash perfectly. 430mh/s from the 5870s each, and just a touch over 700mh/s from the 7970. I have even tried underclocking the cards heaps to try and get them to at least run, but nope, massive amounts of hardware errors. Most of the time CGminer crashes just as it tries to load. Few other points: - VRMs aren't getting hot.. the cards don't even start - Each card works fine if installed on its own - Still hardware problems if cards are installed but disabled in cgminer Can anyone help me? Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: phrozenspite on May 15, 2013, 01:08:18 PM how much ram do you have
Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: BrainShutdown on May 15, 2013, 01:16:02 PM how much ram do you have Yes it could be RAM quantity and/or quality :) Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: WeissJT on May 15, 2013, 01:25:11 PM Thread concurrency for each card?
Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: The Mafia on May 16, 2013, 05:19:26 AM Its only got 2 gigs of ram in one machine, the other machine had 8 gigs and had the same issues.
I was using 8192 for the 7970 and the 7950 cgminer --scrypt -o http://us.mining.coinpool.in:3333 -u xxxxx -p xxxxx -I 13 --thread-concurrency 8192 -g 2 -w 256 --lookup-gap 2 --gpu-fan 75,75 --temp-overheat 85,85 --gpu-engine 950,900 --gpu-memclock 1375,1200 But I would get this error: http://users.on.net/pacey/bit/starterror.JPG If I remove all settings and just run a basic command line, I get this: cgminer --scrypt -o http://us.mining.coinpool.in:3333 -u xxxx -p xxxx -I 13 http://users.on.net/pacey/bit/hwfailure.JPG Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: Foamy on May 16, 2013, 05:21:41 AM setx GPU_MAX_ALLOC_PERCENT 100
put that in cmd prompt and this should fix ur problem. Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: The Mafia on May 16, 2013, 05:58:39 AM Tried that, no luck :(
Dropped 4 gig of ram into it too, and still no luck. Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: bengx on May 16, 2013, 06:03:25 AM I was having problems with CGminer for a while too, exactly the same issue with you but I fixed it with some tweaking. Try adjusting the worksize in the config file, and try lowering the thread concurrency. I'm currently running one 5850 and one 6970.
Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: The Mafia on May 16, 2013, 06:09:55 AM Holy shit?
I dropped the worksize to 64 and it actually started to work?? I did this about a week ago and for some reason it didn't work...! I will test a little further and let you know Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: The Mafia on May 16, 2013, 09:40:59 AM I have now installed 2 x 7950 and 1 x 7970 and the worksize is at 256 and works ok now.
ONly problem is with 3 cards installed I get 7970 - 450kh/s 7950 - 200kh/s 7950 - 200kh/s Increasing the intensity seems to help a bit but not much at all. On their own, these cards go well over 600kh/s each Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: shantee on May 16, 2013, 11:29:06 AM decrease the intensity under try 12 or under even under 10 - 8
Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: The Mafia on May 17, 2013, 12:12:53 AM Unfortunately that brings the hash rates down to 50kh/s each
Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: lopheaded on May 17, 2013, 12:26:51 AM I have now installed 2 x 7950 and 1 x 7970 and the worksize is at 256 and works ok now. ONly problem is with 3 cards installed I get 7970 - 450kh/s 7950 - 200kh/s 7950 - 200kh/s Increasing the intensity seems to help a bit but not much at all. On their own, these cards go well over 600kh/s each Hello, could you post your .bat and/or .conf ? Title: Re: Problem mining litecoin + multiple graphics cards and cgminer(Bitcoin is fine) Post by: The Mafia on May 17, 2013, 12:28:41 AM I don't run a conf file, but here is my batch string:
cgminer --scrypt -o http://us.mining.coinpool.in:3333 -u hunglikehorse -p hunglikedonkey -I 15 --thread-concurrency 8192 -w 256 --lookup-gap 2 -g 2 --gpu-fan 70,70 --gpu-engine 1080,950 --gpu-memclock 1500,1400 This gets 500kh/s out of the 7970 and 400kh/s out of the second 7950. I have taken the 2nd 7970 out because it gets too hot |
