We got our hands on the Bitmain Antminer X3 CryptoNight ASIC miner and decided to quickly test it. Antminer X3 is capable of delivering 220 kHz at 550 watts of power consumption in accordance with the specifications and the type of device (as the developer describes it to us). But, unfortunately, in practice it is far from always capable of producing such indicators. This is partly due to the fact that we came across some strange results, trying to get the ASIC miner to work properly in some popular pools and services, such as NiceHash, for example.