Asic miners are the latest evolution step in bitcoin mining hardware and are currently most effective hardware solution. With network hashrate growing from gigahashes to petahashes per second just within 3 years, the previous bitcoin mining hardware options, like cpu, gpu and fpga miners become obsolete because of low hashing speed and high power consumption.
The situation in asic miners area and bitcoin mining area at all recollects rush for gold era. With media discovery of bitcoin and his recent exchange rate risen to USD 1000, thousands of miners rush in bitcoin fever to buy mining equipment, most of the time still non-existent (using preorders)
On this page I will try to keep up to date list of curent asic miners manufacturers and their products.