2*r9 280x + 5770
06/05/14-10:55:53 - New job received
Speed: 578 h/s, TotalHashes: 218K, DevHashes: 10K Mining time: 00:06
06/05/14-10:55:59 - SHARE FOUND! - (GPU 0)
80% faster than my single core i7, 4 cores (OC-ed). 3 high-end VGA card combined <> 1 single core i7 CPU, 4 cores
Another comparison (excluding pool/exchange fees/taxes):
Processor: 4820k, 4 cores w/ AES accel, 126w resting, 171w mining, 45w used for mining. Delivers 180 hash/sec. 4 hash/watt. Cost: $324 New. Hash/$ = .56 . Monthly Power cost (me): $5.185. Net @ 4.47M# = (.002532BTC/MRO * 29.18MRO/Month * $645.97/BTC) = $47.73. Net = $42.54. ROI = 7.6 months
GPU: r9 290, stock clocks, 216w used for mining (Comp w/ GPU mining - Comp w/ no GPU hooked to pwr.), 437.5 h/s. 2.02 hash/watt. Cost: ~$420 New. Hash/$ = 1.04 . Monthly Power cost (me): $24.4. Net @ 4.47M# = (.002532BTC/MRO * 70.92MRO/Month * $645.97/BTC) = $91.6. ROI = 4.6 months
GPU has about a 1.65:1 edge over the CPU for ROI
CPU has about a 1.97:1 edge over the GPU for hash/watt operating costs
GPU has about a 1.86:1 edge over the CPU for Hash/$ investment
Really interesting numbers .. too close to call it for either one at this point. Every update or optimization changes these numbers and there's been lots, for at least the CPU over the last month. Anyone know any other PoW that has such a small gap between CPU's and GPU's?
Edit: Forgot to mention this is on windows, you probably see much better numbers for at least the CPU on linux