Call me worried but, I think I have found a setting that gets me a decent hash rate with temps below 60c. 300 with the current set up that I have will yield 59 and 57 degrees on the blades but within the first hour or so I get 1 hardware error and over the course of a day and a half (36hours) I have 12 hardware errors. Now, I am powering this miner with a high quality 80 gold 650watt power supply.
first of all, are 12 hardware errors over the course of 36 hours ok for the miner? does that seem a bit high? I suppose the cooler I get the less likely the hardware errors will be produced. I am getting two new noctua nf-f12 fans, one at 3000rpm (push) and one at 2000rpm (pull) to replace my current setup as the wife has finally said the miner it too loud and producing too much heat.
I am asking about hardware errors again because I noticed that when I first set the miner to 300 it performed at just over 1Th/s and now it is working at just under 1Th/s. Do hardware errors effect hash rate?
The number of HW errors is not important. It's the percentage. HW errors are a GOOD thing for ASICs. It means your ASIC is being pushed to its limits for speed. Generally there is a tradeoff early on. Going from 0 to 1% HW errors results in a 5-15% increase in speed. and that takes about a hour to even out or become stable.
Future increases generally have smaller gains. Good ASIC firmware will automatically push the clocks up on ASICs to maximize the effective hash rate. but if it goes over a certain % that is bad, for the S5 i think the safe % is 0.388 or some thing like that . mine never go over 0.02 that's for days not mins or hours and i OC with a 750 gold psu or higher on all my S5, I'm not pushing OCing just saying even at 300 i would use a 750 or higher .
I would buy a 750 Watt psu gold . that gives you a lot of head room, but that's me. That may even be why the high temps it's not supplying enough power to keep it cool, when it needs it. I may be wrong . i can't say I all ways over kill on PSUs not to much but just enough that it's not a waste .
I thought about a higher PSU but I couldn't afford the higher psu and well, i didn't plan on overclocking the miner either so I just went with a supply that meet the miners needs, 4 VGA and at least 600 watts. So how to you calculate hardware errors in percentage? so I can make sure my miner does not go over a certain percentage.
you really can't because diff speeds do diff HW errors or can but i don't know how to other then watch it, why not set it to default 350 and not 300 your not OCing then actually getting better hash rates and that's the bitmain allowed safe setting . it should do no higher then 590 at the wall . it seems your about right in temps for those two fans from what Ive seen from others using the same fans. you want at least 141 CFM per fan to sty around 55 to 57 and lower with those fans because of the low CFM it might go up to 60 or better, I have noticed from other posts . btw if that's all its doing your fine you can't stop the HW errors but can control how cool it stays by making sure it stays in a cool room all year long. either use the very noicely default fan or replace it with two id say 151 CFM or the ones you have but the temps will go up close to 60 or over with them, 80 C the miner will shut down and 78 or some thing the miner may start beep as a warning .. stay at 350 defaults then watch the HW error after a hour it should settle down and be ok unless something is wrong with the miner .
I would send a PST to the players who asked you to if you haven't, to make sure nothing is wrong with the miner, if there is they will replace it.
After 36 hours imo all you get is 12 errors not bad. I get after two days any were from 2000 to 4000 errors but my % stays low in a very safe range and that's all i worry about . . I just explained that the HW errors are good as long as they don't go over the limit and won't if you stay at default speed or lower . as for what % to what speed before they go up I would stay at default setting it should be fine . Ive notice the only time ever HW errors get bad is if it's OC to much , it's not cool enough or some thing is wrong .
I hope this helps and sorry i don't know the exact math to calculate hardware errors per hash or can tell you how much hash you get before it happen, i think your asking other then 0 to 1 Hw errors incenses speed by 5-15%. maybe that should be rewritten some how in CGminer so others don't feel alarmed to much, to a diff name .
Cya and GL
