after weeks of board 3 (slot 4) being my hottest at around 74.5 it now has an issue with Output Current of 0.438 A
since today, board 2 (slot 3) is now hotter as it was during previous fw, however i have not had any hardware concerns until now.
is there a newer fw on the horizon that will sort this, or should i expect to incur losses upon losses?
After hours upon hours of rebooting, resetting, reflashing, re-enabling & reading (& waiting) i have a 40Gh loss in actual performance - shall i just reflash it and wait 3-4 more hours...?
is there a newer fw on the horizon that will sort this, or should i expect to incur losses upon losses upon headaches upon time wasted?
Hi Edgar,
I have exactly the same problem. Was 565GH/s at the pool - now 515GH/s at the pool. One board with 0.4XX A according to Bertmod.
As far as I am aware the only 'fix' is to try heating the board in question up to a higher temperature and *hoping* it comes back online. I haven't tried it as I am also hoping for some kind of firmware fix in the future.
So, when the hot VRM drops to 400 milliamps, and you close cgminer in putty, then upgrade to an early firmware like 0.90, then run enablecores.bin, then finally shut down the system, restart after a little cool down, it wakes up, you apply bertmod, you look at the cores, and the one core, even after a cool down and an enablecores.bin before shutdown, never again runs more current than 400milliamps? (edit - wasn't thinking clearly there.)
If the VRM isn't damaged then running enablecores.bin on firmware 0.90 should reenable it. (enablecores enables cores not the vrm, again I wasn't thinking clearly) If it doesn't I'd guess it's damaged. And I'd guess the damage was the result of the VRM having the cliipon heatsink epoxied high and not cooling the VRM properly.
Enablecores isn't going to wake up a bad VRM. Cooling might. If it starts then stops providing current then maybe pressing on the VRM snapon heatsink will help but if it never puts out reasonable current again, maybe it got so hot as to melt solder and create an open.