The Antminer R4 uses a 16nm BM1387 ASIC chip, which it considers the world’s most power-efficient chip for bitcoin mining. The chip can deliver a hashrate of 8.6TH/s with a power efficiency of 0.1J/GH at a noise level less than 50dB. The noise level is 52dB at an ambient temperature of 35°C.
Bitmain’s in-house engineered control board for the Antminer R4 employs the Xilinx’s ZYNQ-7000 family system-on-a-chip (SoC). The chip integrates a feature-rich dual-core ARM® CortexTM-A9 based processing system (PS) as well as a 28 nm Xilinx programmable logic (PL) in a single device. It supports Gigabit Ethernet to ensure mined blocks are submitted instantly.
https://www.cryptocoinsnews.com/bitmain-to-launch-antminer-r4-for-home-bitcoin-mining/
