w for tuning.... Where should I start? What the -I 9 option I see? How do I know if I'm going to blow up that overclocked HD 7970 card?
If your miner is dedicated running with the -I 9 option.
Like the directions say, most of the options beyond username/password/host/intensity cause problems.
That said, I think the default overheat shutdown temps need to be reduced to 78c from 85c and the target temp needs to be reduced to 65c from 75c.
What version of the 7970 did you get? Some can be overclocked more than others.
I have three MSI 7970s with the Frozr fan setup and a voltage regulator for overclocking. (NewEgg $519 currently)
I am running ubuntu 12.04 also on a usb like you.
my MSI cards with the following..
GPU Clock: 1185
MEM Clock: 1300
Fan Speed: 80%
GPU Temperature: 65c
Voltage: Factory
Hash Rate: 708MH/s
Case: open side panel.
I don't understand the voltage settings so I have not attempted to modify that. I have tried very low memory clocks and the system becomes unstable below 1200. I have tried much faster memory clocks and the system becomes unstable at 1400. I have tried very high gpu clocks and the system becomes unstable above 1200 Somewhat more stable at 1190. 1185 seems to be the most stable (so far)
1200 gpu clock produced 730-743 MH/s
1190 gpu clock produced 715-720 MH/s
There is a wiki which lists cards and settings at -
https://en.bitcoin.it/wiki/Mining_hardware_comparisonI would love to hear other people's settings on this card though.
EDIT: I didn't mean 1900 for gpu clock (1300 is max). I meant 1190... fixed.