When it comes to building a mining rig the power supply is one of the most important hardware components that shouldn’t be considered lightly. Making sure you get the best power supply for mining cryptocurrencies will ensure the longevity and stability of your rig. Obviously getting a power supply with enough wattage is a major factor but there are other important aspects to consider.
Here at Crypto Miner Tips, we know firsthand how confusing it can be to figure out which power supply to buy. Therefore, we wanted to create this guide to help you find the best mining power supply to fit your needs. In this guide, we will show not only the best mining power supplies to get, but also how to properly size your power supply (PSU) as well.
However, before we begin let us cover some mining basics that will help decide what maximum size power supply you can safely run on your outlet. Also, be sure to stick around to the end where we reveal our favorite mining power supply of them all.
Mining PSU And Circuit Loading 101: Safety First
Before you even think of buying a mining power supply, it’s always best to examine the rating of the circuit breaker your planning on using to power your mining rig. This will save you a ton of time and allow you to know what you can safely operate without tripping a breaker or even worse, cause a fire.
According to the National Electrical Code (NEC), it recommends that a circuit be loaded no more than 80% of its total wattage capacity. Here in the US, the standard wall outlet is rated at 15 amps on 120 volts. To calculate this, we can take the (amps X volts) X 80% to determine the circuit’s max load. This means a 15-amp breaker can safely run no more than 1440 watts total.
Check out this circuit load calculator to find out how much your breakers can safely handle.
Most mining rigs, depending on the build, will use somewhere around 850 to 1100 watts total. This makes mining on a 15-amp breaker doable however keep in mind of anything else that’s running on that same circuit. To determine the wattage of any appliance you will need to multiply the amps by the line voltage or try to google search the wattage specs of the other items on the circuit.
Furthermore, it might be worth it to upgrade the 15-amp breaker to a 20 amp if your main panel will allow it. As always, it’s best to consult a licensed electrician before ever attempting such a task.
How to Determine What Size Mining PSU To Get
So now that we got some basics out of the way, it’s time to figure out what size mining power supply to get. This can easily be determined but will vary depending on the type of mining rig build you have in mind. A large mining rig with several GPUs will require a higher wattage PSU vs a smaller rig with just a few GPUs. Therefore, it’s important to calculate the total power consumption of the rig before trying to establish which brand to purchase.
Additionally, it’s important to note it’s never a good idea to load your mining rigs power supply at 100% of its capacity. Doing so can cause your PSU to deteriorate prematurely and may cause other components of the rig to fail as well. As a rule of thumb, it best to leave a 20% margin in case of surges or power spikes that commonly occur in GPU mining.
It’s also wise to consider the other components of your mining right, such as the CPU, Motherboard, Ram, and Hard Drive will add an extra 250 watts of consumption. Furthermore, the coin you plan to mine will also vary in terms of power consumption. However, let’s not forget that overclocking the GPUs is a must and will help lower power consumption as well.
The good news is there are tools like whattomine that can give you an overall idea of what each GPU will consume for each coin you plan to mine. From there, you can multiply the number of GPUs you plan to run and add in an extra 250 watts for all the other components plus the 20% margin. See whattomine GPU power consumption table here and follow the example below.
For this example, we will use our top recommended mining card from our previous guide which is the 1660 TI 6GB.
As you can see the 1660 Ti uses around 90 watts on most coins with a few around 100 watts. If were to plan on building a 6 GPU rig, we would factor the GPUs to use around 540 watts on the low end and 600 watts on the high end. Plus, our 250 watts on other components bring us to a grand total of 800 watts on the high-end just to be safe.
Once we factor in our 20% margin, we can clearly see that we need at least a 1000-watt mining power supply to meet our demand. However, this leaves no room to ever expand whereas if we went with a 1200-watt PSU we’ d have room for two more cards later if we wanted to scale.
Other Factors to Consider for Choosing A Mining Power Supply
The efficiency rating of PSU is a measure of how efficiently a power supply can convert electricity from AC to DC. Meaning an 80 plus rated 1000-watt power supply with an 80% efficiency will need to draw 1200 watts from the wall to produce a true 1000 watts. Therefore, the other 200 watts get wasted in heat and will not be used to power the mining rig. We recommend trying to go with a minimum gold 80 plus rated for max performance and efficiency.
Getting a power supply with an excellent warranty is a must. Here at Crypto Miner Tips, we’ve experienced only one PSU failure out of all the mining rigs we have. Thankfully, the mining power supply was under warranty still after 3 years and got it replaced with no questions asked. There is a saying that good things ain’t cheap and cheap things aren’t that great. We recommend going with a power supply that has at least a 2-year warranty but some even have a 10-year warranty as well.
When building a multi GPU mining rig you will need to power them with mining risers. Each riser will need either a 4 pin Molex or 15 pin SATA cable to power it. This is important as you can’t really mine efficiently without them. That’s why we recommend going with a power supply that comes with enough ports and cables to meet your mining rigs needs. While we’re on the subject of cables, it’s worth a mention that its unwise to mix cables from different models of power supplies as they have different ratings, and some are even incompatible.
ATX vs Server PSU
Ok, so we understand there are other more affordable options when it comes to mining power supplies, such as server style PSU. While we could recommend them here in this guide, to us, they are not the best option and here’s why… For starters, ATX style PSU offers better surge protection to protect your other components. Furthermore, server style ideally needs to run on 240v to get the most out of them. Not to mention if you’re not careful in the way you turn them on and shut them off you can run the risk of shorting out your motherboard. Therefore, we recommend sticking with the ATX style PSU. Oh, and server style fans tend to be noisy.
Best Power Supply for Mining
Alright, so now that you know how to properly size a PSU for your mining rig needs, time to reveal our list of best power supplies for mining. Honestly, this was a tough decision to do as we could have recommended a lot of different models here. However, we stuck with what we personally use for the most part. If you have any questions about mining power supplies or need further assistance, don’t hesitate to join our FB group for help.
EVGA SuperNOVA 1300 G2
When it comes to power supplies EVGA is one of the top leaders of the industry. The EVGA SuperNova G2 is an 80 plus 1300-watt series and provides up to 90% efficiency under typical loads.
We personally use these for our 6 GPU 1080 Ti mining rigs and have had no issues whatsoever over the past three years. One thing that we really like is the fact it comes stock with enough cables to meet most mining rig needs. Another great feature is the fact that this model is backed by a 10-year warranty which to us is huge.
However, when it comes to price this model does tend to run a little on the high side of the market, however, we truly believe its quality can’t be beaten. The fans on this model are very quiet and durable as well. All in all, this thing is a beast when it comes to power a mining rig and suits most miner needs.
Another leader in the computer power supply industry is corsair which has several series of power supplies in addition to the HXi models. The Corsair HX1200i, power supply is an 80 plus 1200-watt platinum rated and has 90% efficiency at real-world load conditions.
We’ve used quite a few of these on our 8 GPU 1060 6gb and 6 GPU RX 580 8gb rig builds and couldn’t be happier. This model comes with more than enough cables to fit most mining rig builds needs. The Corsair HX1200i is also equipped with surge protection that is unparalleled to most of the other mining power supplies out there.
If we had one gripe to complain about this model is the fact that the cables are a bit bulky which makes cable management a bit of a task. However, that’s trivial to us considering its price is low when compared to other models out there.
EVGA SuperNOVA 1200 P2
The EVGA SuperNova 1200 P2 power supply is yet another popular option for building a powerful mining rig. This is a 1200-watt platinum-rated power supply that offers a 10-year warranty as well. It’s built with the same award-winning technology from EVGA other P2 and G2 models and is 92% efficient at 110 volts.
This model is fully modular to make your mining rig look uncluttered. It comes with 6 VGA connectors for a total of 8 8-pin connectors to power your graphics cards. It also has 2 Molex cables and 4 15-pin SATA cables for a total of 12 connections which ensures enough cables to power your risers and SSD. Finally, it has a 14-gauge power cable for max performance.
Again, when it comes to price you might pay a bit more but considering EVGA 10 warranty for this model can make it a great option. We would recommend this as a mining power supply for most 6 to 8 GPU mining rig builds.
EVGA SuperNOVA 220-G3-1000-X1
The EVGA SuperNOVA G3 is yet another popular option that offers an 80 plus gold 1000-watt power supply. This model has all the same great features as the award-winning G2 series but with a smaller form factor. The efficiency is on par as well with it being 90% efficient on 120 volts.
This model also comes with EVGA outstanding 10-year warranty like most other models. As far as cables go this model would be great for a 4-6 gpu mining rig build depending on your GPU model. However, if you need more power you could buy a 24Pin ATX PSU Y Cable 24 pin Splitter Power Cable run two of these in unison for added performance.
When it comes to price this is one of the cheaper models to go with that doesn’t sacrifice much performance. The 850-watt model in this series would be a great option as well if you wanted to build a 2-3 GPU cross-functional gaming/mining rig. EVGA FTW!
CORSAIR AXi Series AX1200i
The Corsair AX 1200i is Corsair’s flagship power supply that offers an 80 plus platinum-rated 1200-watt power supply. This model is fully modular like most models and immense efficiency of 89% while under 100% load which is impressive.
This model also comes with a lot of cables to suit most 6 GPU and even some 8 GPU mining rig builds. However, its price is a tad on the higher end of the spectrum of what you might consider but it makes up for it with a full 10-year warranty.
Honestly, we’ve used this model on quite a few of our mining rig builds and have had no complaints other than price. However, the stability and little downtime on our rigs have made this PSU a purchase worth every penny.
EVGA Supernova 1600 P2
Out of the mining power supplies listed here, the EVGA SuperNOVA 1600 P2 is the best of them all. This power supply is 80 plus platinum-rated with an impressive 1600 watts and 92% efficiency on 120 volts.
When it comes to quality cables there is no shortage of them with this model. This mining PSU can power most 8 GPU mining rigs with no problems. In fact, we use these on our 8 GPU 1070 8 GB mining rig builds and have been quite happy with the performance.
However, this is one of the bulkiest and heaviest mining power supplies ever so keep that in mind when you are choosing a mining rig frame. All in all, the power output on this is exceptional and yes it comes with a 10-year warranty as well. You might pay a premium for this model but the quality you get is worth it to us.
Top Recommended Mining Power Supply: Conclusion
So now you know what some of the best power supplies for mining are, but you’re still wanting to know what we would recommend if we were to choose one model. When it came to this decision, we want to include price as a factor as well, so here is our top pick mining PSU.
The Corsair 1200 HXi is our number one pick out of all the ones listed here. We’ve used this PSU in most of our GPU mining rigs and couldn’t be happier. The fact is you’re not going to find much other quality platinum rated PSU at the same price as this one while still offering a 10-year warranty.
Furthermore, when it comes to having enough cables this model will fit most mining rig builds needs which to us is important. Honestly, this was a tough choice between this model and the EVGA SuperNOVA 1300 as its one of our favorites as well.
In the end, there are many other great models as well from EVGA and Corsair that we could have shared here which will work for mining cryptocurrencies. The most important factor is properly sizing one to fit your needs.
This concludes our best power supply for mining crypto guide. If you feel this information has helped you in any way, please drop a comment below. We truly love hearing from crypto mining enthusiasts from all around the world.