Re: Mining Costs and Speed
You don't mine Bitcoins anymore even with a single ASIC miner. You mine altcoins using ATI graphics cards, ideally several and trade those for BTC. It's much more effective.
ASIC miners can't currently mine altcoins like litecoin, digitalcoin, worldcoin etc as they use scrypt which ASIC doesn't support although there are rumours of them coming out in the future. However they won't mine faster than people using decent ATI cards, only run with lower power requirements.
It's still viable to run a PC with ATI GPUs 24/7, it more than covers the electricity and with a single 9750 you'll get around £80/month profit at current prices, but it's really those playing the long game - hoping prices rise that are doing it. Personally I'm not entirely convinced the profit calculators online are reliable anyway especially with the rising cost of electricity, potential HW failures if you don't keep everything cool and fluctuations in the BTC/LTC market which has been all over the place in the past month.