If you’re eyeing to build a quiet PC build then you’re also going to need a silent power supply that makes very little noise. Usually, the PSU exhaust can be very noisy. In fact, it can be one of the noisiest components in the whole build and if you’re looking for a quiet experience then you’ll need a silent power supply. Luckily, we’ve found the best quiet power supplies on the market that money can buy in 2021. Read on and find out which power supply suits your needs best.
Silent PSU: Quick Comparison
be quiet! Straight Power 11
|Best Passive Power Supply||
EVGA SuperNOVA G3
|Silent PSU for Gaming||
Corsair RMX Series
Quiet Power Supply: 2021 Reviews
1. be quiet! Straight Power 11
be quiet! Straight Power 11 is an excellent choice if you’re looking to get your hands on quiet PSU.
It comes laden with a 135mm silent wing fan that is extremely quiet.
It is a full-modular quiet power supply that will meet all your gaming requirements. be quiet! Straight Power 11 comes in different sizes and you can choose between 650W-1000W wattage.
For modern gaming, be quiet! Straight Power 11 will be able to handle the load of Nvidia’s RTX series.
With 80+ gold efficiency, this power supply can be very power efficient and will save up to 93% energy.
Furthermore, the capacitors installed inside this power supply are also quite durable and will hold up their end of the bargain for a long time.
As for the airflow, a quiet fan doesn’t mean that airflow will be less effective. The PSU is designed in a way to maximize the airflow inside the case and keep the temps on the down-low.
Most power supplies make the most noise under extreme load and this is where they show their true colors but with be quiet! Straight Power 11, you won’t be hearing any noise.
Moreover, this quiet PSU can easily fit inside a mid-ATX tower but it weighs around 6.6 pounds which is quite heavy. Make sure to have a rigid PC case and solid chassis before getting your hands on this one.
Lastly, be quiet! Straight Power 11 is a quite quiet power supply and if you’re looking for the most silent power supply in the market then we recommend taking a closer look at this one.
2. Thermaltake Smart
Thermaltake Smart is also one of the finest and the quietest power supply in 2021.
It offers a wattage of 500W-700W with 80+ power efficiency to save up a bit on the electricity bill.
Unfortunately, Thermaltake smart is a non-modular power supply but it could handle all your power requirements.
The only downside of non-modular power supplies is that cable management is very hard but on the other side, they’re quite cheap as well.
This one comes with a 6-pin connector and if you’re rocking a mid-level graphics card then you’re in for a treat.
Furthermore, Thermaltake smart comes with an ultra-silent 120mm fan that is extremely quiet, and even under extreme loads, it won’t make any sound.
For a silent PC build, Thermaltake Smart would be a very wise choice.
Aside from its performance, the airflow is effective as well and the power supply won’t be exceeding the limit of 40c.
The airflow inside silent PC rigs is not ideal but with this power supply, the exhaust fan will take care of things and the internals won’t be heating up.
The matte-black exterior with a touch of white really gives an amazing look to the whole thing and if you’re a minimalist geek then you’re going to want this power supply.
As for the price point, Thermaltake Smart is quite cheap and offers the best bang for the buck.
In conclusion, Thermaltake Smart is another contender for the quietest power supplies, and if you’re looking to soundproof your PC then this PSU will come in handy.
Also, Thermaltake Smart comes with a 5 years warranty which is another major perk of this silent power supply.
3. Seasonic PRIME Titanium
Best Passive Silent Power Supply
Welcome to the future.
Seasonic PRIME is a passive power supply that doesn’t come with an exhaust fan.
Instead, it comes with heat sinks that could get rid of the excess heat.
The capacitors and other components on the board are heat resistant and can handle extreme temperatures.
If you’re looking for the most silent power supply then a fanless power supply seems like a very reasonable option.
Seasonic PRIME Titanium is a full-modular PSU that comes in 600W-1000W wattage with 80+ ATX12V that saves up on electricity while maintaining the power efficiency the whole time.
For gaming purposes, Seasonic PRIME is a pretty good power supply and would easily manage to handle Ryzen or Intel’s 10th gen processors backed with RTX series.
Although, the airflow inside the case without the PSU’s exhaust would be very bad and you’ll need to throw in a few 120mm fans to get better airflow.
Furthermore, Seasonic Prime Titanium is extremely light-weight and only weighs around 1kg.
Moving on, it can easily fit inside mini/micro-ATX because this silent power supply is very compact as it doesn’t feature an exhaust fan.
As for the price, Seasonic PRIME titanium is quite expensive and you must have a couple of hundred dollars burning a hole in your pocket if you’re eyeing to get your hands on this one.
Furthermore, one thing’s for certain that passive power supplies are the quietest PSU out there but they’re extremely expensive as well.
If you’re working on a tight budget then this one is not for you.
The bottom line, Seasonic Prime Titanium is an excellent and silent power supply that will serve you well and if there are any factory defects, you will get a 12 years warranty to claim it.
4. EVGA SuperNOVA G3
Best Power-Efficient Silent Power Supply
It comes laden with a hydraulic dynamic bearing 130mm exhaust fan which is extremely quiet and eco mode is another added bonus that offers the best power efficiency.
G3 is very compact and can easily fit inside small cases. If you’re looking for the most silent power supply for a small PC case then EVGA SuperNOVA G3 will treat you well. G3 offers a wattage of 750W which is more than enough to power a high-end PC.
For gaming and other demanding operations, G3 can easily handle extreme loads as it is featured with the highest quality capacitors and the coil will also hold up its end of the bargain.
Aside from its performance, G3 also offers a good airflow inside the case.
And for the noise, G3 won’t be exceeding 20dBa noise levels even under extreme load.
Furthermore, G3 is rated for 80+ gold and will save up a lot on the electricity bill.
Moreover, this quiet power supply from EVGA is completely modular and it comes with 2x 8(6+2) pins that are the general requirements for modern graphics cards.
Lastly, EVGA SuperNOVA G3 comes with a 10-year warranty which is another perk of this excellent power supply.
Lastly, G3 is quite expensive and you’ll have to pay a decent amount of money to get your hands on it.
5. Corsair RMX Series
Quiet PSU for Gaming
Corsair RMX power supplies are available in 550W-1000W wattage and all of them are featured with 120mm exhaust fans.
It is 80+ gold certified with excellent power efficiency that saves up to 90% in energy compared to traditional power supplies.
Furthermore, Corsair RMX power supplies are very quiet and on low to medium loads, they don’t make any noise but under extreme loads, they might provide noise levels of nearly 17dBA which is quite reasonable.
As for the performance, Corsair RMX series won’t have any problems in powering up high-end rigs with all kinds of RGB fans and strips.
If you’re thinking about getting yourself a silent PC build then the Corsair RMX series would serve you well.
Equipped with Japanese capacitors, Corsair RMX series power supplies are very durable and can last for a very long time.
Price-wise, the Corsair RMX series is also pretty expensive but this one is worth every penny.
Another perk of this supply is that it is very compact and can be easily installed in small PC cases.
If you’re looking for the most durable power supply that makes very little noise then the Corsair RMX series is a perfect choice.
Silent Power Supply Buyer Guide
Buying a quiet PSU for silent PC build can be a bit tricky. There’s a lot of things to consider but here are a few things that you should keep in mind when you’re buying a most quiet PSU for your PC. You may also like to read our best silent PC Case 2021 article.
Never Buy Cheap Power Supplies
Cheap Chinese quiet PSU are also in the market. However, these cheap PSUs will make your PC go kaboom and there’s a solid chance that the rest of the components will also get burned.
Even in budget builds, you should always have some spare bucks for a decent power supply.
Out of the power supplies mentioned above, Thermaltake Smart is the cheapest one it offers the best bang for the buck.
If you’re looking to save a bit on PSU then Thermaltake Smart is a very decent choice.
Before buying a quiet power supply, you must calculate the power needed to power up all the components that you’re going to use in your build.
If you own a mid-range PC then a PSU with somewhere around 550W-750W wattage will handle all your needs.
However, if you’re thinking about having a couple of GPUs in SLI then you’re going to want a very powerful power supply that offers around 1000W-1300W wattage.
PSU Size & Weight
The size always matters.
For mini/micro-ATX cases, compact power supplies will easily fit inside of them. However, big power supplies that offer more wattage are usually quite big in size and won’t fit in small cases.
If you’re building a high-end PC then an ATX is a must because it could fit every component inside without any alteration.
So what’s the best quiet power supply (PSU) for silent PC build? You can be sure that these ultra quiet power supplies reviewed above will serve you well.
Be quiet! Straight Power 11 is our personal favorite and the best rated silent PSU on the market in 2021. However, Thermaltake Smart is a bit cheaper and for those who don’t have too much budget, can easily squeeze this one in their silent PC build.
Best rated quiet PSU for gaming is the Corsair RMX Series Power Supply.
Some of the PSU reviewed are pricey and more suitable for high-end rigs and there are also some cost-efficient options that will also treat you well and meet all your needs.
Having a quiet PC is everyone’s dream and with most quiet power supplies, you can achieve that as well.