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ethereum-mining / ethminer

Ethereum miner with OpenCL, CUDA and stratum support
GNU General Public License v3.0
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Hashrate drops after running for 2-12 hours #667

Closed SuCitta closed 6 years ago

SuCitta commented 6 years ago

Hey there. I got this problem, that my hashrate seems to be dropping without any reason. I got a R9 390, with about 26Mh/s (stock, not OC) and a R9 280x with about 12Mh/s ... Sometimes the system runs stable about up to 12hours with 37-38Mh/s, sometimes it breaks down at 2huors already. It goes down to 11-20Mh/s (both Crads)..., though the system keeps the same temperatur (390 around 88, whilst 280x @76 ... I have not yet figured out, what causes this issue but updated this morning to 0.14.0dev1... same results after about 3hrs... After the H/s drops, restarting the miner does not solve the Problem, but only restarting Win (7, 64Bit)... Any clues? Many many thanks !!!! Keep on the good work!! PS: I know, i need to opimize my sys... but 390 are gone balisic in prices... they are nearls 50% more expensive compared to when i bougt my first one (back then 200€, now around 300€)

AndreaLanfranchi commented 6 years ago

Your temperatures are way too high imho. 88 C is eccessive and even 76 is too high. Maybe your cards are self-protecting

SuCitta commented 6 years ago

Thanks for fast reply! Hmm, they seemed very high for me too... But with monero i was able to mine for 24/7 (one Week only) with this temp... Also, i dont know how to cool them down? (without further investment, new cooler)

AndreaLanfranchi commented 6 years ago

Monero is a completely different algorythm (Cryptonight) which is way less aggressive on GPU's ram and needs a completely different overclocking setting (if any). In my experience your cards run reliably with temps ranging from 58 to 65 max.

If your cards are mounted in a cabinet computer's chassis and they are too near ... well you have a problem.

SuCitta commented 6 years ago

Ooops... So, you would advice me to?

AndreaLanfranchi commented 6 years ago

Mount on an open-air rig frame.

dimkasta commented 6 years ago

And put fan control at 100% if you do not already have it at that level

SuCitta commented 6 years ago

Sorry for late reply... @dimkasta is it already @AndreaLanfranchi ... thinking about that... but, i do have, imho, a "not that bad" case with good airflow... anyhow, i figured when downclocking my 390 it works fine now... Still as you mentioned, temperatures are way tooooo high

DeadManWalkingTO commented 6 years ago

Seems to be a temperature problem here! Check ExtremeTech’s guide to air cooling your PC. Maybe open air case solution.