Quote from: Bufius on February 09, 2014, 06:35:42 PM

Quote from: mrbrdo on February 09, 2014, 03:36:11 PM

Could one of the developers please address this issue: https://bitcointalk.org/index.php?topic=416572.msg4971799#msg4971799
There have been several people in that thread that responded they had the same issue. I am worried that this will kill my cards. I have had this problem after a day of mining VTC on two separate rigs (different cards too, 7950 and 280X).

Short recap of the issue:
After mining VTC for some time, some cards start showing 511 C and 0 RPM in Vertminer, are not hashing, and get very hot. Even after coldreboot, the problem does not go away, and also appears in normal cgminer (which previously never exhibited this issue). It seems it is necessary to turn off and wait some time before it starts working again. I've never had this problem with the normal cgminer. On some of my 7950s, after this issue occured, I never reached back the same hashrate as before (about 50KH/s lower in normal cgminer).

Vertminer 0.5.3.

I also noticed that when I use I13, TC8193 on my 280X (the I13 is crucial), I will get 1 or 2 HW errors when I start vertminer, but no (or not many) more after that. I am wondering if this could be related. However at I12 I cannot get more than around 270 KH/s, while I get 360 on I13.

i can only guess.

Are the cards overclocked? Do you use the auto-fan feature of the miner?

FyI: the codebase of vertminer is nearly the same as with cgminer-3.7.2 but the opencl kernel is tweaked -> the cards are pushed harder
My 7950s run since > 1 week without any problem (only yesterday i had to restart because here we had a 2 second power loss)

Not overclocked much, stock mem on the 7950 (1250MHz) and 1020 MHz engine. They are undervolted to 1.081V, but had no issues at all on these settings using normal cgminer. No auto-fan, 85% fixed fan, 60 degrees. Note I had the same issue on R9 280X, different rig (different PSU brand, different motherboard etc). I've been running those 280X without touching it and without any problems on cgminer.