I think I found my limit. I have an s5 running 337.5 with only 4 hw for 24hr period. It's hashing at 1.1Th/s but sometimes it dips to just under 1Th/s. Why is that? Is it due to power irregularity? Also, at these settings to he temps are 66 and 68. I know that is high for the miner but I'm not getting hw errors. So I think this is stable. But the temps. I keep reading that the miner needs to be below 60. Is that due to instability and hardware errors. I once thought heat was related to hardware errors but with this discovery it is inconclusive. So, all you really knowledgeable people out there, is is safe to rum at or below 68c? I have a push pull fan system and have replaced the stock fan. It's not quiet, in fact, I have to make another fan changeout before the week is over. This fan setup is too loud for the fam.
When I make the can switch I'm not going to be at 1.1Th/s but I would like to be close. I'll be watching the temps and if I'm stable and I can run the miner in the 60's then I could get a few more hashed out of it.
1) What power supply make and model are you running?
2) Are you seeing the varying hashrate on the S5's status page or your pool's status page?
3) What pool is it at?
4) Please can you provide a screenshot of the S5's status page?
Temps are best kept under 60C but its not a "its going to blow up" situation if below 70C. You may shorten the lifetime of your S5 by running it that hot however. Hardware errors shouldn't change appreciably between 60 or 70C either.