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Title: Identical cards, Identical settings, different hashrate Post by: klear on April 06, 2013, 06:49:39 AM https://i.imgur.com/z1upDLb.png
The 7850s are both the same card @ 1125/1525 using these settings https://i.imgur.com/JDMV7Bm.png 5LTC to anyone that gives me information that corrects the problem! Title: Re: Identical cards, Identical settings, different hashrate Post by: LivesUnderTheBridge on April 06, 2013, 11:58:41 AM Change intensity down to 11.
Downgrade from catalyst 13.1 to 12.8. LYogfVW253cuHmjE5Qm6ryXQfTZFdHNjUX Title: Re: Identical cards, Identical settings, different hashrate Post by: klear on April 07, 2013, 12:18:28 AM 12.8 causes cgminer to crash instantly, thanks for the reply
after messing with it for a while i finally got it working, i cant really say what fixed it but did a lot of driver cleaning and afterburner uninstalling/reinstalling. working with 13.3 b3 drivers and the latest stable afterburner. I can't adjust the 7850s voltage with afterburner though. Title: Re: Identical cards, Identical settings, different hashrate Post by: os2sam on April 07, 2013, 03:08:43 AM No two cards are identical. All cards have their own optimizations and those do change over time as well.
Title: Re: Identical cards, Identical settings, different hashrate Post by: klear on April 07, 2013, 04:02:24 AM they should get the same or very close to the same hashrate when they are on the same clocks, and they now do
lots of stales - not using stratum at the moment https://i.imgur.com/RGrPg29.png Title: Re: Identical cards, Identical settings, different hashrate Post by: klear on April 07, 2013, 11:21:10 AM I changed back to stratum and the problem is back, I reverted to getwork and the problem persists.
https://i.imgur.com/5JdLCa6.png Also, anyone have any thoughts on the memory usage on 7970 #2 ? https://i.imgur.com/GtlwCgw.png Title: Re: Identical cards, Identical settings, different hashrate Post by: eule on April 07, 2013, 11:37:17 AM Try
Quote 7xxx series cards https://bitcointalk.org/index.php?topic=117221.0Use reaper or cgminer versions 2.11.3 and up (see update below). Set thread_concurrency to somewhere slightly below 64 * bus_width_of_card_in_bits. So, for a 7950, that would be 64 * 384 = 24576; ideal values are 21712 or 24000. Find your bus width here: http://en.wikipedia.org/wiki/Southern_Islands_(GPU_family) To find the optimum thread_concurrency for your card, you will need to search above and below this estimate ideal value and see what is fastest. Also try without shaders, the miner should recognize the optimal number by itself. And I'd set intensity to 18-20 when you're not using the desktop. At least set it to this on the secondary card not used for the desktop. And i'd try guiminer's standard settings for the gpu, they should give good results. Maybe some clues for you. ;D LiEPWK44b8Q7rYE5ztzt7vF1HPHSC2HJGt Title: Re: Identical cards, Identical settings, different hashrate Post by: klear on April 07, 2013, 12:34:50 PM https://i.imgur.com/fWvoEo2.png
gonna leave it there for now, i changed the intensity from 13 to 12 and that seemed to correct it. im using 8192 tc on all cards. |
