Quote from: visdude on August 07, 2014, 09:47:35 PM

Quote from: aztecminer on August 07, 2014, 09:21:50 PM

Quote from: 9600 on August 07, 2014, 08:46:26 PM

Quote from: aztecminer on August 07, 2014, 07:21:58 PM

Quote from: 9600 on August 07, 2014, 08:10:47 AM

Quote from: allcoinminer on August 07, 2014, 06:43:24 AM

Quote from: 9600 on August 07, 2014, 04:35:07 AM

So! All units are hashing over 440gh (Two over 490), but only when using a cronjob to restart the cgminer service every 1/2 hour - 1hr depending on the miner.
Regardless of how long I leave any of these guys up to "stabilize", they always fall to 390-398 after 48 hours.

There's only one thing. I am noticing a rather high number of duplicate shares poolside since starting this restart routine. (surprise)
Is there a cgminer flag among the bitmain options to clear the asic of all work upon a cgminer restart? I know the A1 miners have a similar command with '--hwreset'

Restarting every 30 minutes is a bad practice.
Try replacing thermal paste grease and I think the issue will be solved.

I'm pretty aware how just how shitty it is, but unfortunately after re-pasting two units I saw a decrease in running temperatures but was still experiencing a steep drop off in hash after about 25-35 minutes. One of the units will spike back up to about 470 but never enough to average out to 440 without cgminer restarts.

I wish I could attribute this to poor labor skill on my part, but I'm just about 100% certain I don't suck at apply thermal paste. =/

what kind of thermal paste did u use ??

Ceramique

ok.. do not use AS5 thermal paste and do not place
the plate upside down like this idiot tried to do below:
http://i62.tinypic.com/k9bapy.jpg

check your heat sink is placed right way:
http://i59.tinypic.com/2l9nubs.jpg

with all those "-" it looks like you have a cooling issue on that blade.
look at your plate did you place it upside down by accident ??

Ha! Classic.

I wonder if re-torquing the heat sink screws first was ever attempted to make sure they are snug before going through with the elaborate heat sink reseating gymnastics (and the lost precious hashing time that goes along with it). Most of the time, that's all what's needed (never have had to reseat heat sinks to date). That's all I did with the S3s as it was with the other ASIC devices (BFL, AsicMiner, Blue Fury, AntMiner, etc.) in the past. That's pretty much S.O.P. upon receiving a new (or not so new Wink

) ASIC device.

that first screen show a heat sink placed upside down after replacing stock thermal paste ..
if the heat sink is placed upside down then it does not make contact w the asic chips..
of course that means the asic chips will not cool well and therefore not hash well .