Bitmain is a well-known ASIC manufacturer. Their miners are judged on three things: power efficiency (J/TH), realized uptime in production, and how strong the aftersales/RMA channel is. We only list units with verified provenance and active warranty coverage.

Brand-new Bitmain units ship with the standard manufacturer warranty (usually 12 months). Used and refurbished models may be sold without warranty - this is called out on the individual product page. LeedMiner coordinates warranty claims with Bitmain on your behalf.