Bitmain Antminer R4 Home Bitcoin Miner allegro101 08/25/2016 Miners 16221 Bitmain Antminer R4 Home Bitcoin MinerBitmain is targeting the home bitcoin miner market with the new Bitmain Antminer R4 miner. The Antminer R4 is the first bitcoin miner that addresses the specific needs of the home bitcoin miner. Projected cost is about $1000 from this webpage we found at the Bitmain site.The Antminer R4 hashes at 8.6 TH/s with a power consumption of 845 Watts at the wall using Bitmain’s $300 APW5 PSU. Noise level is only 52 decibels due to an innovative centrifugal fan design. This is very quiet for a home miner and should be less noisy than a home window air conditioner. Here are the details of the power supply you also need to purchase:The R4 home bitcoin miner uses 126 of the new Bitmain BM1387 16 nm ASIC chips with power consumption of 0.098 J/GHs. This would make the R4 the most power efficient and quietest bitcoin miner you can buy for 120V home use. Most homes and apartments have an outlet that can handle 845 watts safely.You can expect your electric bill to increase though! Consider that a typical electrical space heater uses 1500 watts and puts out 5100 BTUs of heat. Expect the 845 watt draw of the R4 to put out a little over half the heat of your normal small space heater. Your air conditioning bill will go up and the miner and PSU will add about $65 to your electric bill if your power costs 10 cents per kWh.Will The Antminer R4 Pay For Itself?The BitcoinX mining profit calculator reports at current $574 bitcoin price the Antminer R4 would pay for itself in 527 days if your power costs $0.10 per KwH. For the miner to return your $1300 in one year Bitcoin price must increase to $750. The Bitmain Antminer R4 goes on sale August 29, 2016 at enshop.bitmain.com and Bitmain has formally announced sales of the R4 at the Bitcoin forum.Update: On Sale At Higher PriceThe Antminer R4 just went on sale Monday August 29. Price for the miner is $1395 instead of expected $1000 and power supply is $240. This is way too high in our opinion and the R4 will never return your investment. Take a pass for now and wait for Bitmain to lower the price of the miner to $1000 or below.