Antminer S9 Review – 6 Things You Need to Know Before Buying

With the ever increasing difficulty to mine Bitcoins it gets harder and harder to actually make a profit as a Bitcoin miner. However not too long ago the most powerful and efficient miner to date was introduced – The Antminer s9.

The Antminer s9 seems to be to only Bitcoin miner still able to create a somewhat positive ROI in today’s environment. Many reviews praise the product while others have their doubts. So I decided to sum up all of the pros and cons into one simple review – here it is before you…

6 things you need to know before buying an Antminer s9

1. The Antminer s9 the most powerful miner available on the market

The Antminer s9 has a hash rate of 12.93TH/s -+ 7%  (and not 14 TH/s as advertised sometimes), which means that it can generate around 0.5 Bitcoins every month. This is of course only revenue and not taking into account the electricity, mining pool fees, or hardware expenses. I ran the numbers against 3 different Bitcoin mining calculators and they all show the same result. Around $330 a month of pure revenue (at today’s exchange rate this equals around 0.5 BTC).

The Antminer S9 is also the most efficient miner on the market. This means that it wastes the least amount of energy than all other miners out there. If you add into account electricity cost as well you will generate a little less than that – around 0.33BTC.

2. The Antminer s9 is the most expensive miner on the market

The price of the Antmier s9 varies a lot. On Bitmain’s site you can buy it for $2400. On Amazon you can find it for as little as $2700 and on eBay you can get it for as little as $2000 (so that’s probably the best place to look).

This is the most expensive miner on the market today because its superior mining abilities. In order to break even with your investment you will need to mine for about 10 month taking into account an average electricity cost of $0.1/KW. 10 months is a long time in the Bitcoin universe and a lot can change – mining difficulty can rise, exchange rate will fluctuate and all of these make it hard to predict how long will it actually take to break even in this investment.

3. You need an additional PSU to run the Antminer s9

The Antminer s9 can’t just be plugged into the wall, it needs a PSU (power supply unit). So whenever you purchase an Antminer keep in mind that you will need to spend and additional $150 on a PSU. Bitmain (Antminer’s manufacturer) recommends using APW3-12-1600-B2 which can be found on their website, on Amazon or on eBay at different price points as well.

Here’s how to set the miner up with the power supply (notice how loud the miner gets once you operate it):

If you own a PSU of an old Bitcoin miner you might be able to use that as well. For example the EVGA SuperNOVA 1300 Watt GPU PSU should also work with this miner. However if you don’t already own a compatible PSU it will probably be best to just buy the APW3-12-1600-B2 and add it to your initial investment cost. It probably won’t cost much more than any other old PSU you can find.

4. You may want to consider getting a bunch of S7s instead of one Antminer S9

Seeing as most people will probably rush to buy the new Antminer s9 you may want to consider getting the older model (Antminer s7) at a discounted price due to lower demand. The Antminer S7 has about 33% of the hashing power of the s9 (it runs at 4.73 TH/s) but if you buy 3 used ones it will probably cost less. Here’s what one experienced miner had to say about the Antminer s9:

My overall rating is a 3.5 since these don’t deserve a 4. These are great miners that can replace about 3 s7s. However, the miner gets way too hot over the s7s. I can easily run my 5 s7s in my garage in florida at 55% (which I have to because any higher and they make a loud whinny noise) while these are kept at 100% and still get too hot. I can easily keep these at 100% with no whinny noise issue and are more quiet than the s7. If you do want to use the s9s then they will have to be in a much better controlled environment(which I will have to come up with) if you want to keep these lasting longer.

If you do go down this path though it’s important to recalculate profitability as the Antminer s7 is less power efficient than the s9. Here’s a complete comparison of the Bitcoin mining hardware available.

5. Not all Antminer s9s are created equal

Bitmain delivers their Bitcoin miners in batches. Every batch is different than the other and also has a different hash rate. So it’s extremely possible that you’ll find yourself buying an Antminer s9 that has a hash rate of only 11.85 TH/s and not 12.93 TH/s. That’s why it’s important to know the specifications of the exact miner you’re looking into before buying it.

For example, the current batch of Antminer s9s available from Bitmain are only 11.85TH/s, the more powerful models are sold out. However, on eBay you can still find people selling the older more powerful model. Keep in mind that the 11.85TH/s models are also priced lower than their bigger brother, so it’s not like you’re getting ripped off or anything by buying that model.

Bottom line – make sure to know the EXACT specifications of the miner you’re buying. This way you will know to calculate the exact ROI and when you will break even.

6. You get a 90 day warranty on your miner (if bought from Bitmain)

Bitmain supply their customers with a 90 day warranty, however that warranty comes with limitations. For example, the warranty won’t be valid if you overclock the miner (running it at a higher speed than it was designed to run). Also, if you use an inappropriate power supply or generate environmental damage to your miner you won’t be eligible for a warranty (e.g. lightning strike, corrosion due to wet environment). Some eBay sellers will also supply you with a warranty so make sure to read the details on each listing careful.

Bottom line – is the Antminer s9 worth it?

If you’re interested in getting into Bitcoin mining then the Antminer s9 is probably the only logical solution. However the answer to the question “is the Antminer s9 worth it?” is totally personal. It depends on many factors such as:

  • How much money you have available to spend on Bitcoin mining
  • Where you live (i.e. electricity costs, cooling costs)
  • How much do you believe Bitcoin’s value will rise in the future

Also there’s always the question of the increasing difficulty and how much time will pass until the Antminer s9 becomes obsolete (usually this happens within 8-12 months). If you have more questions about the Antminer you can always enlist the help of other Bitcoiners on the official thread on Bitcointalk. Happy mining!

Click here to find the best deals on the Antminer s9