AntMiner S5 ~1155Ghs .51WGh 28nm ASIC Bitcoin Miner Bitmain antminer s5 1155 ghs 28nm asic bitcoin miner

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Bitmain recently introduced the Antminer S5 with their next generation chip. The S5 has the familiar open blade design as the S1 with panels on the sides to direct airflow without being completely encapsulated as the S3. What makes the S5 shine are the new chips. The S5 consumes 560 watts in our tests and runs at 1.1 to 1.2 th/s.

Specifications Antminer S5:

  • Hash Rate: 1155 GH/s ±5%
  • Power Consumption: 560 to 590 W
  • Power Efficiency: 0.51 J/GH
  • Chips 60x Bitmain BM1384 Gen3
  • Rated Voltage: 12V
  • Dimensions: 298 mm x 137 mm x 155 mm
  • Cooling: 1x 12038 fan
  • Operating Conditions: 0 °C to 35 °C
  • Network Connection: Ethernet

Also Read:  Bitmain Antminer S4 Review: 2 th/s Bitcoin ASIC Miner

Review of Antminer S5

The shipping gods were benevolent this time and Bitmain sent them prepared in case they were not. S5 arrived very well packaged in a rigid bubble wrap casing. This new packaging protects the Antminer from damage it can take in transit. The first thing we noticed was how light the S5 is at just 6.5 lbs. This light weight is due to the use of plastic side panels directing the airflow on the outside as opposed to the full metal casing the S3 had. While they feel a bit flimsy the tight fit and well-placed screw’s keep them secure. The top and bottom are open with simple access to the top for the four PCIe power connections. The S5 is noisy due the single 120mm fan that drives the air over the blades not being the best. The Antminer S5 runs at 61 to 65 dB at 4 feet. While not an immediate divorce maker, they are not quiet enough to put in your living room.

Low Power Consumption, Solid Hashrate

For this review, we used a Dell 1200 watt server PSU with a custom breakout controller board being made in conjunction of HolyBitcoin and J4bberwock. (We will have a full review of server PSUs and breakout boards for them in the coming weeks.) We also tested with an EVGA 1300 watt Supernova. The S5 pulled 560 watts at 110v from both PSUs. For this test, we used BTCGuild and Antpool where the S5 consistently ran at 1.186 th/s. This aggressive chip brings Bitmain up to the top with the Spondoolies-Tech SP20 even slightly better. The move is a good one as falling BTC value has made each gh/s you can squeeze out of a chip at the lowest power usage a win.

S5 560 Watts at The Wall

The Antminer S5 uses DHCP to get on your network taking away some of the hassle of out of the box static IP addresses that may not be the same as your routers DNS setting. The control panel is the simple to use as always with the initial user name and password root / root. The password should be changed immediately. The pool config panel can quickly be populated as ever making the total setup to mining time short.

One criticism is the lack of the extra nonce feature many of Bitmain’s competitors have allowed for more coins and pool types to be used. The S5 work well on P2Pool from the start with none of the hiccups the S4 had. Bitmain’s Antpool can be used in P2Pool mode as all showing their promised commitment to keeping the global hash rate distributed. With Antpool being the second largest pool, it would be nice to see them follow through and move all of their power to P2Pool. As of now the choice is manual between “solo mining” and P2Pool on their pool.

The Antminer S5 is an excellent next step and with power consumption levels low. The S6, when it comes out with multiple blades and a rack mount chassis, should be a beast if they go that route like they have in the past with their S2 and S4.  Yoshi the US Bitmain Sales representative told CCN at TNABC in Miami that the S6 may also be their next Gen chip though so time will tell which way they go.

The S5’s loud fan may turn off some buyers, but we replaced it with a Cooler Master jet flow that had a higher CFM and much lower volume at 48 dB. The change in fans also resulted in a drop in temps by 4C. Being winter and the temps below freezing in the CCN mining laboratory, we pushed the clock speed freq up and were able to get the S5 to a stable 1.41 th/s at 630 watts. Any higher the error rate would push from 1-3% to 6-8%.

The Antminer S5 also is a solid under clocking system able to drop just below 480 ways and still perform at nearly 1 th/s. This power saving feature is critical when BTC value dips are allowing you to still mine under clocked to save power costs yet at not so much of a hit performance wide to cost you too many satoshi’s.

Overall another excellent chip and miner from Bitmain. How long they can keep the crown of the fastest power to gh/s ranking will be tested soon as Spondoolies and BitFury are both due out with those next gen chips very soon. The Antminer is also priced aggressively as well making it a good purchase.

At TNABC in Miami CCN asked Yoshi a few questions about Bitmain and Hashnest as well as his take on Cloud Mining with the BTC value that had taken at dive at this point. When asked about Cloud Mining he was very clear that most miners have an EOL and if they are accelerated by lower BTC value they turn them off. He noted they also have rolled out the S4 in HashNest as a choice that would allow customers to run longer. Now that the BTC value is rising many of the current miners will remain profitable longer as well.

We also asked about extra-nonces support as many customers needed it to have the S5 run on multi pools like WestHash. At the time, Yoshi the S5 would be able to do them but they had not released the new firmware. Bitmain has now released the new firmware found here, and the miners are running great with this new ability. Hytekk has put up a guide on how to install the firmware and activate the extra nonce capability.

Thank you, Yoshi for the information and Hytekk for the handy guide for those who had not updated the firmware before or enabled the extra nonce feature. We will be doing a longer interview with Yoshi in the near future. Stay tuned.

Disclosure: Antminer S5 was purchased by the writer for review.

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I am a disabled former Systems Admin, computer tech, business manager enjoying crytpo currencies. I am deeply involved in the mining ecosystem and physical coins, It fascinates me how it has brought people from all over the world together into a tight knit supportive community with commerce and tech.
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AntMiner – Bitcoin Wiki


  • Low cost miner, with second-hand units available for under $200
  • Relatively low power demand of 590 Watts
  • Good for learning and experimentation


  • Noisy (~75dB) single fan design, although mods can quieten it
  • Spec hashrate of around 1155 GH/s is low by today’s standards

Buy Antminer S5

The AntMiner S5: Still Relevant to Modern Mining?

Bitmain released their AntMiner S5 Bitcoin miner in late 2014. At that time, it was one of the fastest and most efficient ASIC miners available, rivalled by the Spondoolies-Tech SP20.

However, the S5 has long since been surpassed by newer models.

As a product of a 28nm fabrication process, the S5 can’t be reasonably expected to compete with modern 16nm or 14nm ASIC designs in terms of hashrate or power efficiency.

Is there still a place for the venerable S5?

If you’re a hobbyist miner on a budget, with no interest in the profitability of transmogrifying electricity into bitcoins, then the S5 is worth considering.


Note: Before you buy an Antminer S5 make sure you already have Bitcoin mining software and a Bitcoin mining pool.

Used AntMiner S5s are available on eBay and Amazon in a price range between $190 and $299; most ship from America.

New S5s ship from Bitmain in China for $413, although there may be a waiting period before stock becomes available.

Remember to factor in shipping costs and possible customs duties.

S5 Compared to Other Hardware

Power Supply

The S5 will draw between 560 to 590 Watts at around 115 Volts. Any sufficiently-powered ATX Power Supply Unit will run the S5 without problems.

That means that your old PC power supply – or someone else’s second hand one – can be easily repurposed for Bitcoin mining.

Note that the efficiency of power supplies is rated as gold (10% of electricity wasted), silver (20% wasted) or bronze (30% wasted).

The efficiency of power supplies is a worthy topic of investigation for any aspiring Bitcoin miner; inefficient, unrated power supplies will waste electricity and create extra noise and heat.

A list of PSU ratings may be found here.

Ideally, get a PSU from the Corsair Enthusiast Series Bronze Certified PSU; either the 650 or 750 Watt model.

The 650W model is available second hand for a little over $100. Corsair has a good reputation among Bitcoin miners and other tech enthusiasts for building reliable hardware. The Bronze series offers good value.

One thing to note is that under-clocking the S5 is difficult without a special, 9 Volt-capable PSU.

Bitcoins per Month (Profitability)

Our Bitcoin mining calculator is helpful for calculating the profitability of any Bitcoin miner, based on relevant data.

Be sure to run your own calculations, using your local power rate, preferred mining pool and the price at which you intend to buy your S5.

The CoinWarz site will automatically fill in the currentBTC-USD price, Difficulty and Block Reward.

Note that in July 2016, the Block Reward will halve to 12.5 BTC for every block solved.

In order to see any bitcoins from a single S5, you will need to join a Pool. The odds of solo-mining a block with a single or even several S5s are virtually zero.

The post-halving Reward, relatively expensive Power and AntPool’s Pool Fees are entered,
along with the current Bitcoin price and all the relevant stats of the AntMiner S5.

The results are, as expected, highly unprofitable:

Red bracketed numbers indicate negative returns.

Even if Bitcoin price were to double to a new all-time high around $1400, the returns would remain negative.

However, if you’re able to bring your electricity costs below 10c per KWh, you could just about break even at the current price of ~$700.

So, given a much higher Bitcoin price, cheap power, stable Difficulty and perhaps modifications to improve efficiency, profiting from a new or used S5 is not impossible

Power Efficiency

The S5 will produce 1 Gigahash for every 0.51 Watts it consumes. This figure can be expressed as 0.51 J/GH.

The S5’s real power consumption, as measured by your electric bill, will vary depending on your PSU’s efficiency and the ambient temperature.

0.51 J/GH is a lot more efficient than the S3 (0.78 J/GH) but a lot less efficient than the more expensive AntMiner S7 (0.25 J/GH) or S9 (0.098 J/GH) models. Traditionally, each new BitMain miner series doubles efficiency.

It’s possible to upgrade the S5’s hashrate, primarily by increasing its frequency (aka overclocking) but this increases the miner’s power and cooling requirements.

There are ways, ranging from simple to extreme, to manage the overclocking burdens. Gains of up to ~400 GH/s are achievable but require serious effort. This video demonstrates oil immersion cooling.


The S5 is open at the top and bottom and the sides are constructed of fairly lightweight plastic.

This limits the placement of the unit and somewhat reduces its safety. One upside of the plastic casing is that the unit only weight 2.5 kg. / 6.5 lbs.


The noise from a stock S5’s 120mm fan has been compared to an industrial vacuum.

It’s definitely an unsuitable device to run in your living environment; it’ll drown out conversation and irritate people or pets.

The only solution is to replace the stock ~75 decibel fan with a quieter kind. Often a secondary fan is added to the back-end, where screw holes exist for this purpose.


The S5 will automatically search out an available IP address to use and features an intuitive control panel.

The MinerLink software will allow you to monitor the status of your miner(s), easily configure your mining pool settings, upgrade the device’s firmware and share access privileges to the miner over a network connection.

The MinerLink interface.


Onboard temperature must be maintained below 80^C / 175^F. Keeping the onboard temperature below 60^C / 140^F will prolong the lifetime of the S5.

As with all miners, the lower the operating temperature, the higher they can be overclocked.


The S5 is unlikely to ever turn a profit, so it’s hard to justify the cost of buying one new.

That said, a cheap, second-hand S5 in decent condition is a great tool for learning the ropes of Bitcoin mining.

It represents a low-cost introduction to the complex business of Bitcoin mining.

The S5 is also a good platform to experiment with hardware, firmware and software tweaks and mods.

At roughly one tenth the price of the cutting-edge Antminer S9, the S5 is cheap enough to try potentially damaging operations like over/under-clocking and immersion cooling.

S5 Compared to Other Hardware

Review by: Jordan Tuwiner

Rating: 3

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Power consumption figures will vary with your PSUs 1155, the ambient operating temperature and 28nm accuracy of the power meter. The efficiency of power supplies asic a worthy gh/s of investigation for any aspiring Bitcoin miner; inefficient, unrated antminer supplies will waste electricity and create extra noise and heat. My first venture into Bitcoin mining…. My Bitmain Register Login. Bitcoin will send you a prepaid label. I am working on troubleshooting steps with support now. It shows a low-cost introduction to the miner business of Bitcoin mining.

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