I have finally got these two bad girls reasonably stable at asic temp of 68c and power module at 44c/45c
Note the evo 212 coolers are lifted 15mm up. This has reduced the cold airflow over the power modules.
after I used the "Hairdryer Mod" the boards would restart, but the temp. at the power modules would slowly fall.(eventually crashing again)
The cardboard cover is (hopefully) holding the temp. in the power modules and the cold air from the evo is deflected upwards.
The secondary fans are controlling the airflow under the boards, if I move them around then the temp. does change.
https://www.dropbox.com/s/y6dc59y5zzeaub5/IMG_20140110_105218.jpgEDIT still hashing after 3 hours
EDIT 2 crashed after 5 hours
Hello
I have also some crashs during last days from low voltage reset boards, at this moment ( not yet totally confirmed ) i suspect form internet connection: when it stops during few seconds (maybe or more than 30 seconds) boards lower the hash and cool down enough to be unable to restart by its own. Normal boards aren't affected. Discovered this during a router restart.
I changed setup putting this board on not cooled area: hash will be lowered but expect more immunity from connection drop-outs
Regards
Edit: 4H+ running: I think 26º Ambient temperature helps too ...
Edit: Exceded 14H hashing:By far longest time without incidents with all received boards.
"the black sheep" - BFL 3: 55.0C | 35.14/35.20/31.91Gh/s | A: 4280 R:21+ 2(.49%) HW:26874/8.6%
Edit 3: 28H hashing without intervention: Decided maintain and use this setup ( one board without direct power converter cooling ). Total hashing at Pool now for 4 Lucko's chilli boards: 131 GHs
