15 Best Power Supplies of 2018: The Ultimate Guide

Best power supply for gaming - the ultimate guide
Power is the most important aspect for building a gaming PC. Why? Every computer needs power running through it; that’s why it’s essential to find the best power supply for gaming that will meet your needs for optimal performance.

Whether you’re searching for the best PSU that you won’t have to replace for a long time or you’re just wondering which of the best power supplies are sufficient for your gaming PC, this guide will assist you in buying the best power supply to make your gaming experience as excellent as possible.

400-600W Power Supplies

600-800W Power Supplies

800-1000W Power Supplies

1000W+ Power Supplies

What is a Power Supply?

A power supply unit, or PSU, is the most important part of a computer when it comes to function and usage. Just as the engine of a car gives the vehicle power, the PSU gives your computer power to run at its best.

Every part of the personal computer (PC) needs power, whether it be the graphics card, RAM or CPU. Without having the best computer power supply, none of the components would work.

If you’re searching for PSU for gaming, you’re going to need even more power than the average PC user. The parts of a gaming PC often have higher specifications than those of an average PC, which is why you want the best power supply that you can afford.

Purchasing a cheap and inefficient PSU can be a recipe for disaster if you’re in the process of building a gaming PC.

More often than not, you’ll start experiencing major complications, such as PSU malfunction. This is a gamer’s worst nightmare as it may cause damage to the major components connected to the PSU, not just the PSU itself.

When shopping for the best power supply, you’re going to need to look for the highest quality products with the best wattage and efficiency so you can avoid paying extra money for replacement parts in the long run.

What to consider when choosing a Power Supply?

Power Supply Form Factors

Power supply units can come in several shapes and sizes and they can only be put in certain areas or positions in your computer case. When discussing the physical arrangement of the PSU in a computer, the features discussed are called “form factors”.

All of the larger components of a computer need to have compatible form factors. The three components of a computer that have form factors include the case, power supply and motherboard.

There are a number of form factors configuration specifications in existence; with ATX (Advanced Technology Extended) being the most common for current power supplies. Current ATX variations include micro-ATX, ATX12V v1.x, ATX12V v2.x.


Micro-ATX form factor is only used for smaller PC types such as media center PCs. While getting micro-ATX components is a cost-effective way of building a PC, it is not ideal for a gaming PC as it does not have enough size or power to accommodate the larger components such as modern graphics cards and extra RAM module slots.

ATX, ATX12V and Other Versions

The difference between different versions of ATX form factors are the connectors that attach to the power supply.

Namely, the number of pins that is required to connect the power supply to the motherboard. The number of required pins has grown over time (from 20 to 24 in recent years). The increase in pins is due to the requirement of more power to support higher-powered motherboards, so the latest versions of ATX will be able to accommodate higher performance PCs.

Modular or Not?

Cables play a vital role in connecting the PSU with everything that needs power. There are two types of power supply units when it comes to cabling: Fixed and modular.

The Benefits of Modular:

A modular PSU means that you only need to use the cables as you see fit based on what cables you need at a given time. While modular PSUs may cost more, there are a lot of advantages to running this set up, such as:

  1. The PSU isn’t running to the cables that aren’t plugged in, which is a more efficient use of power.
  2. There are less cables to play around with in terms of cable management. This would help people that want to show off their PC with a window case and don’t want to deal with more things that can accumulate dust.

The Benefits of Fixed:

A fixed PSU means that all or some of the cables attached are already linked to the power supply and cannot be taken off. Fixed cabling power supplies do have a few benefits, including:

  1. All the cables are already there and you cannot lose them in the subsequent time after installing your power supply into your computer.
  2. Fixed is generally more cost effective.

Which is Better?

Modular power supplies are generally considered more efficient based on their versatility. With modular, there is a risk of misaligned connections that can cause a slight voltage drop and an increase in the electrical current passing through the wires. However, if you are careful and make sure all the cables are secure, this is unlikely to happen.

Modular may not be needed and will cost more but the advantages of cable management and less cables blocking your cooling might outweigh the cost for more hardcore gamers; the choice is yours!

PSU Efficiency Explained

The power efficiency of the power supply is how much power it is pulling from your main power of the house (the power socket that it is plugged into through the wall or the power board) and how well the PSU converts it into direct current (DC).

A very simple equation to work out the efficiency of a power supply is as follows:

Efficiency = DC Power / AC Power

When examining the PSU efficiency specifications on a given PSU model, you will commonly see the term 80 PLUS or 80+.

This is a mark from a company that certifies all power supply units on how efficient they are. They do not give the certification to any power supplies that do not achieve at least 80% efficiency, hence 80 PLUS.

There are 6 levels of 80 PLUS efficiency. They are all based off how far above 80% efficiency that they can operate at 10%, 20%, 50% and 100% of their maximum wattage.

  1. Base Level: Between 80% and 82%.
  2. Bronze: Between 83% and 85%.
  3. Silver: Between 85% and 88%.
  4. Gold: Between 88% and 92%.
  5. Platinum: Between 92% and 94%.
  6. Titanium: The highest 80 PLUS rating; any power supply that operates at 95% or above efficiency.

Losing PSU Efficiency

There are two main factors that come into play when considering lost efficiency. The first and most obvious effect you may feel, physically, is heat. Because the power supply is drawing more power than it needs, it is producing an excess amount of heat (on a hot summer’s day, this can be very noticeable). You want your computer to run as cool as possible to help prolong its lifespan. For this reason, a higher efficiency rating is the better option when shopping for the best PSU.

The second factor (which may not be very important or noticeable initially) is cost. Specifically, the extra money you are spending on your electricity bill. If you have your computer on a lot of the time, then a lower efficiency PSU might be quite bad for your wallet.

If you are shopping for the best gaming power supply, then you will need to look for at least an 80 PLUS Gold. Many of the higher wattage power supplies already have this, although some cheaper options don’t. For hardcore PC gamers, it’s likely not worth having an efficiency under Gold.

How much power do you really need?

You might be thinking that you’d love to get the highest wattage and efficiency rating that you possibly can. While this comes with the benefit of higher power and performance, you may be spending more money than what you really need.

If you buy the best of the best, then it will likely stay quiet and not produce as much heat as a power supply with a lower wattage. The risk of buying a cheap, low-quality power supply is that the fan might be spinning louder, working harder and producing more heat. This in turn might shorten the life of your PSU. On the other hand, you may be able to spend less money on a PSU that still does its job for what you need.

There are many power supply calculators on the web, such as Outer Vision. This can help you determine the wattage needed for your gaming PC. When using the calculator, stay aware of your system’s specific power requirements.

If you are planning to overclock your CPU and/or RAM or make upgrades in the future, you’ll want to get a higher wattage than what is recommended; most likely in the 1000W+ range. However, if you have no plans to do this, then perhaps getting something much closer to what the calculator says is more acceptable (and cheaper).

If you want to truly futureproof your computer, it’s advised that you purchase a power supply unit that is at least 10% wattage over what the recommendation is. For gamers who require the highest performing PSUs, nothing below 600W is a good idea given the power needs for the high end components associated with PC gaming.

The Best 400-600W Power Supplies

EVGA SuperNOVA 550 G3

Top of the Range PSU that Saves on Space

evga supernova 550 g3
The EVGA SuperNOVA 550 G3 is the new and improved adaptation to the G2 model, in a smaller chassis for ease of transport. The compact size of the SuperNOVA 550 G3 is its biggest upgrade, with the second being that the SuperNOVA G3 suite power supplies are based on a new Leadex II platform. With its small but powerful design, the EVGA SuperNOVA 50 G3 has given itself a boost over the power supply market.


  • Wattage: 550W
  • Modular: Fully Modular
  • Efficiency: 80 PLUS Gold

  • Smaller chassis measuring 5.9” deep
  • Improved performance to the G2 model
  • 80 PLUS Gold certified with up to 92% efficiency
  • 7-year warranty

  • Expensive
  • Minimal cabling instructions
  • Loud fan

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Corsair RM550x

An All-Around Great Performing Power Supply

corsair rm550x - An All-Around Great Performing Power Supply
The great voltage regulation makes the Corsair a top contender for this range of power supplies. This fully modular PSU is easy to install with a nice clean finish for those looking to showcase the components of their PC. The latest form factor lends to its great performance.


  • Wattage: 550W
  • Modular: Fully Modular
  • Efficiency: 80 PLUS Gold

  • Fan doesn’t turn on until needed
  • 10 Year Warranty
  • Excellent performance

  • No fan test button
  • Spacing of modular connectors is awkward
  • Poor quality connector cables

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BitFenix Whisper 550W PSU

A Reliable And Silent Power Supply

bitfenix whisper 550w psu
The BitFenix Whisper 550W PSU is a supremely quiet, powerful power supply unit with an 80+ Gold Efficiency certification. The Whisper has been known to provide stable currents during its highest loads while still remaining quiet and giving off low heat. With the powerful and near-silent power supply giving off stable currents during high loads, the Whisper is an excellent purchase.


  • Intel Specification: ATX 12V V2.4
  • AC Input :100-240Vac
  • Frequency: 47-63Hz

  • Low heat emission
  • Quiet
  • 80+ Gold Efficiency certification, up to 92%
  • Good value for money

  • Cables are tough to plug in within a tight case

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The Best 600-800W Power Supplies

Corsair CX Series 650 Watt

Cost Effective Power Supply for Mid-Range PCs

corsair cx series 650w
The Corsair CX Series 650 Watt power supply unit is an excellent choice for basic system builds or minor desktop PC upgrades that don’t require high-efficiency PSUs. With its high reliability for providing stable currents, 80+ Bronze Efficiency certification, 40-degree temperature rating, and light noise provision, the Corsair CX Series 650W is a good bet.


  • ATX12V / EPS12V
  • Semi-Modular
  • 100 – 240 V 47 – 63 Hz
  • 4th generation Intel Core processor on board
  • 80 PLUS BRONZE Certified

  • Minimal noise
  • Modular cabling flexibility
  • 5-year warranty
  • Low cost

  • Best for smaller profile demands
  • Can’t handle high capacity needs

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FSP Group Hydro G HG650 650W

Affordable Power Supply For The Avid Gamer

fsp group hydro g hg650 650w
The FSP Group Hydro G HG650 650W power supply unit is a high capacity PSU that still provides a fully modular experience. Cooled by a Hydro Dynamic Bearing fan, the FSP Group Hydro G HG650 650W PSU provides a quiet, speedy, cost-effective solution to your power supply needs.


  • ATX12V & EPS12V compliant
  • Fan speed control circuit design with 0dBA function
  • Full protections: OCP, OVP, SCP, OPP, UVP, OTP

  • Modular design with ribbon cables
  • 80PLUS gold certification
  • Five-year warranty

  • Some experience difficulty powering the system on
  • Grinding noise once the fan is turned on
  • No custom cables available

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Seasonic Prime 650W

Great PSU For Casual Gamers

seasonic prime 650w
The Seasonic Prime 650 Watt power supply unit is a simple, aesthetically-pleasing design that houses high functionality. This PSU boasts only 0.5% voltage drops on the primary rails and a 50 °C temperature rating for continuous full power delivery. Even though this model is slightly larger than competitive PSUs, the single +12V rail can deliver the unit’s full power alone.


  • 80 plus Titanium certified
  • Extended hold-up time (30 MS)
  • Super low ripple noise (20 mv)
  • Premium hybrid fan control
  • Cable-free connection design

  • Esthetically-pleasing design
  • Packaged protectively for shipping
  • 10-year warranty

  • No thumbscrews or black screws included in packaging
  • Larger size than other PSUs at 17cm deep

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Seasonic FOCUS Plus Series SSR-750FX 750W

Great Compact PSU

seasonic focus plus 750w
The Seasonic FOCUS Plus Series SSR-750FX 750 Watt power supply unit features a single +12V rail that can output enough power to support two high-end graphics cards. As a fully modular and elegant unit with an 80+ Gold Efficiency certification, the Seasonic FOCUS Plus Series SSR-750FX 750 Watt power supply unit is a high-end and affordable purchase.


  • Compact size for ATX Power Supply
  • 120 mm Fluid Dynamic Bearing (FDB) Fans
  • Tight Voltage Regulation [± 3 %]

  • 10 Years Warranty
  • Seasonic Hybrid Silent Fan Control
  • Compact, silent, and elegant design

  • User guide lacks detail
  • Occasional light clicking noise

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The Best 800-1000W Power Supplies

EVGA SuperNOVA 850 G3

A Quality Power Supply Unit Made for Efficiency

evga supernova 850 g3
Despite being on the more expensive side, the EVGA SuperNOVA 850 G3 power supply unit is unparalleled when combined with powerful motherboards. With a simple installation process, this unit can be set up quickly with little difficulty and a screwdriver.


  • Fan Size / Bearing: 130mm Hydraulic Dynamic Bearing
  • Heavy-duty protections, including OVP, UVP, OCP, OPP, and SCP
  • 90% (115VAC) / 92% (220VAC~240VAC) efficiency or higher under typical loads

  • 10 Year Warranty
  • 80+ Gold Efficiency certified
  • Simple installation process

  • Short distance between four-pin Molex connectors
  • SATA connections very close to one another

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Seasonic FOCUS Plus Series SSR-850FX 850W

A No-Fuss Power Supply Unit for any Gamer

seasonic focus plus series ssr-850fx 850w
The Seasonic FOCUS Plus Series SSR-850FX 850 Watt power supply unit is a modular, powerful unit. At a surprisingly mid-range price, the Seasonic FOCUS Plus Series SSR-850FX 850 Watt power supply unit gives off very little noise while in use and offers a hybrid mode. This PSU boasts extended hold-up time, a fluid dynamic bearing fan, and a compact ATX size.


  • 120 mm Fluid Dynamic Bearing (FDB) Fans
  • Active Power Factor Correction [up to 99 %]
  • Tight Voltage Regulation [± 3 %]

  • 10 Years Warranty
  • Seasonic Hybrid Silent Fan Control

  • Cables are not discreet and pretty
  • Thick cables make the installation cumbersome

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Corsair RM850x

Reliable and Quiet Power Supply

corsair rm850x
The Corsair RM850x 850 Watt power supply unit is fully modular and offers a semi-passive fan mode that facilitates silent operation under light and moderate loads. Despite a small distance between the peripheral connectors, the Corsair RM850x 850 Watt PSU is an inexpensive and powerful unit.


  • 100% all Japanese 105 capacitors
  • Zero RPM Fan Mode: Virtually silent operation at low and medium loads

  • 80+ Gold Efficiency certified
  • Fully Modular
  • Carrying box for extra cables

  • SATA cables don’t lie flat

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Rosewill Glacier 850M

Another Great Quiet PSU

rosewill glacier 850m
The Rosewill Glacier 850M power supply unit is a powerful, silent, modular unit that boasts a 4th generation Intel processor with a single strong 12V rail, which is perfect for gaming. With a 3-year warranty from the manufacturer, the Rosewill Glacier 850M power supply exceeds expectations.


  • 850W Power supply
  • ATX 12V v2.3 / EPS 12V v2.92
  • 135mm Silent Aero-Diversion Fan
  • Strong Single +12V Rail
  • SLI & CrossFire-Ready / Intel 4th Generation CPU Certified

  • Modular Design
  • Comes with zip ties to keep wires tidy
  • 3-year warranty

  • Occasionally dead on arrival (DOA)

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The Best 1000W+ Power Supplies

EVGA SuperNOVA 1600 T2

A Powerhouse of Power Supplies

evga supernova 1600 t2 - A Powerhouse of Power Supplies
With a wattage of 1600, you can overclock and put in as many components as you feel worthy. With a guaranteed 10 years, you can rely on this power supply doing its job for a decade with minimal worry.


  • Wattage: 1600W
  • Modular: Fully Modular
  • Efficiency: 80 PLUS Titanium

  • Extremely high wattage
  • 10 Year Warranty
  • Great voltage stability

  • Very heavy unit
  • High price point

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Corsair AX1500i

Made to Withstand Highest Possible Temperatures

corsair ax1500i - Made to Withstand Highest Possible Temperatures
The Corsair AX1500i comes with a program that makes this PSU fully customizable. With one of the highest performance and efficiencies of any power supply on the market, this is a worthy consideration for anyone hoping to build an ultra-high end gaming PC.


  • Wattage: 1500W
  • Modular: Fully Modular
  • Efficiency: 80 PLUS Titanium

  • Latest ATX12V v2.4 standard
  • 10 Year Warranty
  • Very stylish power supply

  • Very long unit
  • Heavy

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Thermaltake ToughPower RGB 1250W

Sleek Design Perfect for a Showcase PC

thermaltake toughpower rgb 1250w - Sleek Design Perfect for a Showcase PC
The Thermaltake ToughPower RGB is flashy and highly customizable. Perfect for a power user that likes a bit of flare. It’s also among the quietest power supply units. While it has a slight dip in performance, it’s not as pricey as other options.


  • Wattage: 1250W
  • Modular: Fully Modular
  • Efficiency: 80 PLUS Titanium

  • Can control everything through application
  • Colored fan
  • Small and lightweight

  • Connectors prone to breaking
  • Performance not as high as best performers
  • Some plugs are confusing and easily mistaken

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Corsair CP-9020140-NA HX1200 1200W

Powerful High-end PSU

corsair cp-9020140-na hx1200 1200w
The Corsair CP-9020140-NA HX1200 1200W power supply unit runs cooler and uses less power than less efficient power supplies, and allows the user to only use the cables they need for a cleaner looking build with better airflow. With all Japanese capacitors, the Corsair CP-9020140-NA HX1200 1200W PSU is ideal for high-performance PCs where reliability is essential.


  • 80+ Platinum Efficiency
  • 135mm FDB fan with Zero RPM mode
  • +12V Rail Switch: Gives the user the choice of a single +12V rail or multiple +12V rails

  • Virtually silent operation at low loads
  • Fully Modular

  • Expensive

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Our Recommendations for the Best PSU for Gaming

Whether you are looking to protect the environment with an 80 PLUS Gold Efficiency certified power supply or conserve your budget with some of the lower wattage units, there is something for everyone when it comes to purchasing the best power supplies.

  1. For the casual gamer looking to ramp up their power supply by just a little bit, the EVGA SuperNOVA 550 G3 is an excellent choice. If you want something a little less noisy, the Rosewill Glacier 850M is one of the quietest fans and high-quality builds available.
  2. For the mid-range gamer, the Corsair RM850x 850W provides exceptional performance for its price. With a fully modular design with a carrying box for extra cables, the Corsair RM850x is both powerful and affordable.
  3. For the high-end gaming machines, all three units written about in this guide are great choices. If you are looking for a quiet machine, the Seasonic FOCUS Plus Series SSR-850FX 850 Watt is the way to go. If you’d like to spend a bit less but still want a quality power supply, the EVGA SuperNOVA 850 G3 is a cost-effective option.
  4. For the ultra-high gaming machines, the Corsair CP-9020140-NA HX1200 1200W is by far the most powerful piece of machinery with its 80+ Platinum Efficiency certification, cool running status, and 10-year warranty.

How to Find the Best Power Supply for Gaming: Features to Look For

For those looking to build a gaming PC, there are a number of categories to think about before you rush out and buy the best looking or best-performing power supply on the market. Some of the most important features to look for are:

  • Wattage. To find out an estimate of how much wattage is required for your gaming PC, head over to Outer Vision. Keep in mind that a higher wattage can be more costly, but it may also help with heat and noise levels.
  • Optimal Form Factors. If you want a higher powered computer, you’re going to need the most current form factors, such as ATX 12V v2.4.
  • Modular. While modular or fixed is a matter of opinion, choosing modular can mean less clutter in your computer and improved air flow.
  • Efficiency. For all your gaming needs, a Gold rating or more is highly recommended.

No matter what type of gamer you are, you’re always going to need an SSD, enough RAM, good gaming motherboard and the reliable power supply if you want to have the ultimate gaming experience without shortening the life of your computer. Consider your needs both now and in the future, so you can make the best possible choice for long-term gaming enjoyment.

One Response

  1. tehhellhound August 13, 2018

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