hmmmm
I have a smalish problem:
- i use ubuntu 12.10+ati 13.3+cgminer 2.11.3 video drivers on 2 rigs
first rig has 6990 it only runs at speeds 610/1250, if I try to use any higher gpu clock than 610 (say 700) system will simply shutdown in 10 min or so. some of you will say that I use shitty 850W PSU from "ace" and you might be right. when it runs on 610/1250 it seems stable, no hw errors and an average of 650 kH/s, which is not much but seems fine. Here is the script I use for mining:
export DISPLAY=:0
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
aticonfig --od-setclocks=610,1250 --adapter=all
aticonfig --od-getclocks --adapter=all
./cgminer --scrypt --api-listen --api-network -c cgminer.conf --thread-concurrency 8192 --lookup-gap 2 --worksize 256 -I 18 -g 1 -o stratum+tcp://notroll.in:3333 -u x -p y
second rig has 2x5830+5850+A4 cpu with some 6xxx type thing in it. it runs stable (for months) mining btc at 600/667 (a4) 920/600 (5830) and 910/600 (5850) with hash rates of: 28 (a4) 282 (5830) and 365 (5850). no world records there, but I'm happy mining with a stable rig that needs virtually no maintanance. LTC is a whole different matter. What ever I tried to do I would only mine for 10-15 minutes at most. When it did it was stable with no HW errors, temp was 75°C, speeds were: 25 (a4), 220 (5830) and 300 (5850) it drew no more power out of the socket as it did when it was mining btc. but after 10 minutes or so it would shut down. this rig however has high quality 1000W Corsair PSU.
I Cannot get it to work stable! Here is the script
export DISPLAY=:0
export GPU_USE_SYNC_OBJECTS=1
export GPU_MAX_ALLOC_PERCENT=100
aticonfig --od-setclocks=615,1200 --adapter=1
aticonfig --od-setclocks=615,1200 --adapter=2
aticonfig --od-setclocks=615,1125 --adapter=3
aticonfig --od-getclocks --adapter=all
./cgminer --scrypt --api-listen --api-network -c cgminer.conf --thread-concurrency 3072,5760,5760,5760 --lookup-gap 2 --worksize 256 -I 18 -g 1 -o stratum+tcp://notroll.in:3333 -u x -p y
it is interesting that in both cases computer would not start at the press of the power button. I had to disconnect power and reaply it and then restart the pc. this would indicate that indeed some sort of protection mechanism inside PSU triggered the shutdown. but what?
Has anyone seen anything like this??? Where are these shut-downs coming from?
Could this be a cpu scaling (cpu changing freq) related thing?
Should I test the rig card by card?
How come there is no problem mining btc even at 920/1000 on all cards?
Should I reduce GPU_MAX_ALLOC_PERCENT? How about GPU_USE_SYNC_OBJECTS?
p.s. third rig i tried this on uses windows, 2x5770 and 450W!!!! Corsair PSU and is able to mine ltc without a single shutdown!!!
