Have you guys seen this:
https://enshop.bitmain.com/adv/antminer-r4-silent-bitcoin-miner.htmlHash Rate 8.6TH/s (Variation of ±5% is expected)
Power Consumption 845W +9% at the wall (with Bitmain’s APW5 PSU, 93% efficiency, 25°C ambient temp)
Power Efficiency 0.1 J/GH +9% at the wall (with Bitmain’s APW5 PSU, 93% efficiency, 25°C ambient temp)
Noise level 52dB (at an ambient temperature of 35°C)
Chip quantity per unit 126 x BM1387
Rated Voltage 11.60 ~13.00V
Product size 515mm (L) x 100mm (W) x 222mm (H)
Package size 610mm (L) x 215mm (W) x 340mm (H)
Operating Temperature 0°C to 40°C
Network Connection Ethernet
Default Frequency 600MHz