or 22 x i7 cpus just to match a USB ASIC doing 335Mhash/sec - they currently retail at 1BTC so anywhere between £45 and £57 - whereas 22 x i7 will be approx £55

or 22 x i7 cpus just to match a USB ASIC doing 335Mhash/sec - they currently retail at 1BTC so anywhere between £45 and £57 - whereas 22 x i7 will be approx £5500 (at £250 a piece).