Which is more efficient, the M60S or S21?

The Antminer S21 at 17.5 J/TH is slightly more efficient than the WhatsMiner M60S at 18 J/TH. The S21 also produces more hashrate (200 TH/s vs 186 TH/s).

Which miner is cheaper to host?

The M60S costs slightly less per month ($183 vs $192 at $0.075/kWh) because it consumes less total power. However, the S21 produces more hashrate for that incremental cost.

Which brand has better repair parts availability?

Bitmain (Antminer) has the wider parts network due to larger market share. More repair technicians specialize in Bitmain hardware compared to MicroBT.

Do both miners work with third-party firmware?

The Antminer S21 has broader third-party firmware support including BraiinsOS and LuxOS. The WhatsMiner M60S has more limited third-party firmware options.

WhatsMiner M60S vs Antminer S21: Which ASIC Miner Is Better for Hosting?

Choosing between the WhatsMiner M60S and Antminer S21 is one of the most common decisions facing Bitcoin miners in 2026. Both are current-generation SHA-256 ASIC miners with competitive efficiency, but they differ in key areas that affect hosting economics and long-term ROI. This head-to-head comparison covers specifications, efficiency, reliability, and which miner makes more sense for ASIC hosting.

Specifications Comparison

Specification	WhatsMiner M60S	Antminer S21
Manufacturer	MicroBT	Bitmain
Algorithm	SHA-256	SHA-256
Hashrate	186 TH/s	200 TH/s
Power Consumption	3,348W	3,500W
Efficiency	18 J/TH	17.5 J/TH
Cooling	Air-cooled (4 fans)	Air-cooled (4 fans)
Noise Level	~75 dB	~75 dB

Efficiency: The Key Metric

In ASIC hosting, efficiency (measured in joules per terahash, J/TH) directly determines profitability. Lower is better:

M60S: 18 J/TH
S21: 17.5 J/TH
S21 XP: 13.3 J/TH (premium version, for reference)

The Antminer S21 holds a slight efficiency edge. Over a year at $0.075/kWh, the S21 produces slightly more hashrate per dollar of electricity spent. However, the difference is marginal enough that hardware purchase price and availability often matter more.

Monthly Hosting Cost Comparison

At ASICHosting.org's $0.075/kWh all-inclusive rate:

M60S: 3.348 kW x 730 hours = 2,444 kWh x $0.075 = approximately $183/month
S21: 3.5 kW x 730 hours = 2,555 kWh x $0.075 = approximately $192/month

The M60S costs about $9/month less to host but produces 14 TH/s less hashrate. On a cost-per-terahash basis, the S21 is slightly more economical.

Reliability and Build Quality

Bitmain (S21): The largest ASIC manufacturer with the widest service network. Replacement parts are readily available. Most ASIC repair technicians are deeply familiar with Antminer hardware
MicroBT (M60S): Strong reputation for build quality and thermal design. However, parts availability can be more limited and fewer repair technicians specialize in MicroBT hardware

Firmware and Management

S21: Third-party firmware options (BraiinsOS, LuxOS) are available for autotuning and lower dev fees
M60S: Third-party firmware support is more limited compared to Antminer models

Resale Value

Antminer models generally hold resale value better due to Bitmain's larger market share and deeper secondary market.

The Verdict

Choose the Antminer S21 if: Efficiency is your priority, you value parts availability, and resale value matters.

Choose the WhatsMiner M60S if: Purchase price is significantly lower, or you value MicroBT's thermal engineering.

Both are competitive choices. Request a free hosting quote from ASICHosting.org for either model.