Bitmain is one of the top mining equipment providers with a solid reputation for long lasting high quality mining equipment products from their small USB connectable devices - great for beginners - through to their S series - which are steadily lowering the power consumption and increasing the GH/s.
Bitmain have also moved into the mining contract arena with their new and easy to use hashnest software suite. You can buy direct from Bitmain and ask them to install and manage your mining hardware, or buy GH from them.
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