There are specialized stores where you can buy professional mining equipment. The most popular firms are Antminer and Whatsminer. They produce powerful and high-quality mining rigs for cryptocurrencies such as monero, bitcoin, ethereum and litecoin. I bought several models of equipment from Minery. This is an honest and popular hardware store https://minery.io/ae/hardware-store/ . You can go to the site to see the characteristics of top models and contact a specialist to clarify the cost.
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