Before you write to us

A lot of what people email about is answered faster by a page than by waiting on a reply. Hardware faults and RMA questions start at our support centre; if the machine is out of warranty, the repair parts and testers category has the testers and control boards we use in our own repairs. If you are still deciding what to buy, the used ASIC miners category is what we are best known for and the break-even and running-cost guide answers the question we get asked most often, which is whether a given machine pays for its own electricity where you live. If you are checking us out before sending money, the verified reviews and our registered trademark are both documented.