I have two "Sapphire Radeon HD 7970 OC with Boost 3GB" cards and I'm running cgminer currently. Bitcoin is a complicated and in-depth topic that I'm not too familiar with. And neither am I well versed in mining. So I would like some input on the settings I'm using for two cards. I disconnected the CrossFire ribbon cable, and I disabled CrossFire in the Catalyst Control Center. With an OC from 950MHz core to 1100MHz, I'm using the following:
cgminer -o stratum.bitcoin.cz:3333 -u worker -p pass -I 9 --gpu-engine 1100 --gpu-memclock 1425 -v 1 -w 256
I have MSI Afterburner installed to manage the fan speeds relative to the temperatures.
Does what I have look fine? The machine is a dedicated miner.
A couple thoughts:
- lower the GPU memory to 900. I don't think you'll be able to do this with cgminer, you'll need to use MSI afterburner. It'll make it run cooler and use less electricity.
- no need to specify vector or work size. cgminer is smart enough to know what's best for your 7970s
M