Cipher Mining Expands AI Data Center Push With ERCOT Capacity And Long-Term Lease

TL;DR Cipher Mining disclosed conditional ERCOT interconnection capacity for up to 300 MW. The company also reported a 15-year hyperscaler master lease tied to HPC data-center infrastructure. The SEC filing does not identify the hyperscaler tenant by name. Cipher Mining is pushing further into high-performance computing and AI infrastructure, using the power assets built around its mining business as a platform for longer-term data-center contracts. A September 21 SEC filing outlines conditional ERCOT interconnection capacity for up to 300 MW alongside a 15-year hyperscaler master lease. Cipher Looks Beyond Pure Bitcoin Mining The combination matters because power access has become one of the most valuable assets in both Bitcoin mining and AI data centers. Mining companies already control large power connections, land and electrical infrastructure. As demand from AI workloads increases, some operators are trying to convert part of that footprint into higher-value hosting arrangements. Cipher’s filing places it firmly inside that trend. The 300 MW figure refers to conditional ERCOT interconnection capacity, while the 15-year term applies to the disclosed hyperscaler master lease. Th...