Hi all... Big thanks to the community so far for all the help with my rig and getting CGminer working happily. So I have a rig with 4 7970s. two are ASUS, one is a Gigabyte and the last is an XFX. They have varying clock speeds. In the picture below the two ASUS cards @ 925 MHz are GPUs 0 and 1. I think GPU 2 is the XFX and 3 is the Gigabyte. When bitcoin mining they are perform about the same when clocked close to each other. As you can see everything is weird below. There is a 70 or so Khash/s difference between the identical GPU 0 and 1 and a huge difference between 2 and 3. GPU 4 is the onboard APU giving some token Khash. They all report being at max usage, 98-99% activity. Running for an hour now, no HW errors. Here are my cgminer settings:
cgminer --scrypt -o stratum+tcp://ltc-stratum.kattare.com:3333 -u xxxxxx -p x --intensity 13 -g 2 --thread-concurrency 8192 --lookup-gap 2 --gpu-powertune 20 --gpu-fan 65 --auto-gpu --no-submit-stale
As a note the --auto GPU isn't doing much I don't think as the range for GPU 0 and 1 is 925-925 etc. I just stole these setting from someone else
http://i44.tinypic.com/2q0kprp.png
