Just a discussion about how you mine, using GPU or CPU only, or both.
Currently, my MSI Radeon 5770
Hawk (900MHZ, 1300MHZ, fans at 60%, stable at 55C) mines at ~154Mhash/s
My AMD Athlon II 630
(3.1GHZ, fans at 75% (stock cooler), stable at 50C) mines at ~10Mhash/s
Yet when I do both at the same time
, my GPU drops off by ~40Mhash/s and my CPU drops off by ~5Mhash/s, resulting in a net loss on both ends totaling ~45Mhash/s
I have a pretty bad motherboard, and my Radeon IS plugged into a PCIe x16 1.0 slot right now. Perhaps a new motherboard with better hypertransport would be better? Anyone have experience here? I just started bitcoinin' and at 21 hours and counting I haven't made anything yet.
Oh, and I'm a pretty cool guy.
For some reason when cpu mining with all cpu threads + gpu mining, your gpu will automaticly lower to 40%~ usage, only way around this is to limit cpu miner to 1 thread less than maximum available ie. 4core/4thread cpu , set your cpuminer to threads 3 etc.
If you then run gpu miner along with cpu miner, you will get full 3 threads mining on cpu and 100% utilisation on gpu.
Unlike others here, I think its totally worth it to also mine with cpus(specially when you get free power) for the extra mhash/s as long as everything runs stable and doesnt overheat.
GPU MINER: search forum for guiminer, it includes the pclbm gpu miner with a nice gui to control.
CPU MINER: included in above guiminer, inside guiminer setup rpcminer-4way for cpumining and in the cpuminer tab add the flag -t 3 (to leave one thread free so gpu wont throttle)
Follow this advice and you will get cpu+gpu mining nicely.
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