Best Power Supplies 2022

 These PSUs offer the best reliability, performance and protection for your system and its components.

Your PC's power supply (aka PSU) plays a significant role in determining your system's reliability, depending on its performance. So it would be best if you were careful when picking the right PSU for your system. The best power supply should also have features to save your system's parts (including the power supply itself) if something goes wrong with your electricity supply or other components. If it doesn't, it's clearly not the best power supply and is putting your other expensive PC parts at risk.

Of course, you'll also have different concerns depending on whether your power supply will be pushing a monster mining rig, an always-churning workstation, or a basic productivity or gaming PC. We’ll help you find the best power supply for your next desktop PC below.

Finally, one of the significant changes that the ATX12V v3.0 spec brings is the addition of a 12+4 pin PCIe connector to every PSU with more than 450W max power. This means that PSUs lacking this connector won't be compatible with new GPU generations and will soon be rendered obsolete.

Quick Power Supply Shopping Tips

Determine wattage requirements. You don't need to purchase much more potential power capacity (wattage) than you’ll ever use. You can calculate roughly how much power your new or upgraded system will draw from the wall and look for a capacity point that satisfies your demands. Several power supply sellers have calculators that will give you a rough estimate of your system's power needs. You can find a few below:

  • Cooler Master Power Calculator
  • Seasonic Wattage Calculator
  • MSI PSU Calculator
  • be quiet! PSU Calculator(opens in new tab)
  • Newegg PSU Calculator

Consider upcoming GPU power requirements. Although the best graphics cards are usually more power-efficient than previous generations, their power consumption increases overall. This is why the latest 12+4 pin connector that the upcoming generation graphics cards will use will provide up to 600 W of power. Currently, a pair of PCIe 6+2 pin connectors on dedicated cables are officially rated for up to 300W, and three of these connectors can deliver up to 450W safely. You should also add the up to 75W that the PCIe slot can provide in these numbers. 

What troubles today's power supplies is not the maximum sustained power consumption of a GPU but its power spikes, and this is why various manufacturers suggest strong PSUs for high-end graphics cards. If the PSU's over current and over power protection features are conservatively set, the PSU can shut down once the graphics card asks for increased power, even for very short periods ( nanoseconds range). This is why EVGA offers two different OPP features in its G6 and P6 units, called firmware and hardware OPP. The first triggers at lower loads, in the millisecond range, while the latter triggers at higher loads that last for some nanoseconds. This way, short power spikes from the graphics card are addressed without shutting down the system. 

If you add the increased power demands of modern high-end CPUs, you can quickly figure out why strong PSUs are necessary again. Please look at our GPU Benchmarks and CPU Benchmarks hierarchies to see how each of these chips perform relative to each other.

Check the physical dimensions of your case before buying. If you have a standard ATX case, whether or not it is one of the best PC cases, an ATX power supply will fit. But many higher-wattage PSUs are longer than the typical 5.5 inches. So you'll want to be sure of your cases' PSU clearance. If you have an exceptionally small or slim PC case, it may require a less typical (and more compact) SFX power supply. We have picks for this form factor below as well.

For more on this subject, see our A Basic Guide To Motherboard, Case, and Power Supply Form Factors feature.

Consider a modular power supply. If your case has lots of room behind the motherboard, or your chassis doesn't have a window or glass side, you can cable-wrap the wires you don't' need and stash them inside your rig. But if the system you're' building doesn't' have space for this, or there is no easy place to hide your cable mess, it's' worth paying extra for a modular power supply. Modular PSUs let you only plug in the power cables you need and leave the rest in the box.

The Best Power Supplies You Can Buy Today

1. Corsair CX450

Best Cheap PSU ($60/£60 or less)

SPECIFICATIONS

Manufacturer (OEM): Channel Well Technology or Great Wall
Max. DC Output: 450W
Efficiency: 80 PLUS Bronze, Cybenetics Bronze (CWT), Cybenetics Silver (GW)
Noise: Cybenetics A- (CWT, 20-25 dBA), Cybenetics Standard+ (GW, 35-40 dBA)
Form Factor: ATX12V v2.4, EPS 2.92
Cooling: 120mm Rifle Bearing Fan (HA1225M12F-Z or D12SM-12 )
Modular: No
Connectors: 1x EPS, 1x PCIe
Warranty: 5 years

REASONS TO BUY

+
Low price
+
Full set of protection features
+
Great soldering quality
+
Rifle bearing fan
+
Five-year warranty

REASONS TO AVOID

-
Single PCIe connector limits expansion
-
Not as quiet as the CWT-made CX450
-
Short distance between peripherals connectors

Of the two variants of Corsair's CX450, the Great Wall version is more efficient than CWT's, especially under light loads, and has a more efficient 5VSB rail. On the other side, it has a more-aggressive fan profile, so its noise output is increased. In the US market, you will only find the CWT version, which is made in Vietnam instead of China, so it avoids the tariffs and keeps its price tag low.

Another decent alternative if your budget is low, you need more than 500W of capacity, and you aren't that concerned about efficiency or some fan noise under load is the Corsair VS650. It won't win any performance awards, but it gets the job done without much in the way of frills or fuss, for less than $50. You may also be able to save on these or other PSUs by checking Corsair coupon codes.

2. Corsair CX550F RGB

Best Mid-Level RGB PSU: Up to 550 Watts

SPECIFICATIONS

Manufacturer (OEM): HEC
Max. DC Output: 550W
Efficiency: 80 PLUS Bronze, Cybenetics Gold
Noise: Cybenetics-Standard++ (30-35 dB[A])
Form Factor: ATX12V v2.4, EPS 2.92
Cooling: 120mm Rifle Bearing Fan (NR120L)
Modular: Yes
Connectors: 1x EPS, 2x PCIe
Warranty: 5 years

REASONS TO BUY

+
Full power at 47 degrees Celsius
+
Good transient response at 12V
+
Efficient
+
Modern platform
+
Rifle bearing fan
+
Low leakage current
+
Low conducted EMI
+
Compatible with the Alternative Low Power Modes
+
Fully modular
+
Highly-customizable RGB lighting
+
Comes in two colors
+
5-year warranty

REASONS TO AVOID

-
Not so affordable
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Loose load regulation
-
Lower than 17ms hold-up time
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Not fond of the Teapo SC caps that it uses
-
Short distance between the peripheral connectors

The smallest member of the new RMx line gets updated with a top-notch magnetic levitation fan which doesn’t affect the overall noise output, so the new RM550x is one of the quietest PSUs in the 550W category. It would be nice if Corsair added a second EPS connector in this unit, but most folks will be more than satisfied with the connection options. 

3. Corsair RM550x

Best PSU: Up to 550 Watts

SPECIFICATIONS

Manufacturer (OEM): CWT
Max. DC Output: 550W
Efficiency: 80 PLUS Gold, Cybenetics Gold
Noise: Cybenetics A+ (15-20 dBA)
Form Factor: ATX12V v2.4, EPS 2.92
Cooling: 140mm Magnetic Levitation Fan (NR140ML)
Modular: Yes
Connectors: 1x EPS, 2x PCIe
Warranty: 10 years

REASONS TO BUY

+
High overall performance
+
Silent operation
+
Highly efficient at light load
+
Magnetic Levitation fan
+
Fully modular
+
10-year warranty

REASONS TO AVOID

-
In cable capacitors
-
Single EPS connector
-
Small distance between peripheral connectors

The smallest member of the new RMx line gets updated with a top-notch magnetic levitation fan which doesn’t affect the overall noise output, so the new RM550x is one of the quietest PSUs in the 550W category. It would be nice if Corsair added a second EPS connector in this unit, but most folks will be more than satisfied with the connection options. 

4. XPG Core Reactor 650W

Best PSU: Up to 650 Watts

SPECIFICATIONS

Manufacturer (OEM): CWT
Max. DC Output: 650W
Efficiency: 80 PLUS Gold, Cybenetics Platinum
Noise: Cybenetics A (20 - 25 dBA)
Form Factor: ATX12V v2.52, EPS 2.92
Cooling: 120mm Fluid Dynamic Bearing Fan (HA1225H12F-Z)
Modular: Fully
Connectors: 2x EPS, 4x PCIe
Warranty: 10 years

REASONS TO BUY

+
Full power at 47 degrees Celsius
+
High performance
+
Efficient
+
Silent operation
+
Good build quality
+
Compatible with the alternative sleep mode
+
Fully modular


REASONS TO AVOID

-
Two EPS connectors on the same cable
-
The transient response at 3.3V could be better

The XPG Core Reactor with 650W max power can achieve higher overall performance than the two hottest picks in this category, the Corsair RM650x, and the Seasonic Focus Plus Gold, with similar capacity. It also has a silent operation, thanks to the relaxed fan profile, despite its compact dimensions. The build quality is high, and the provided warranty meets the competition's offerings. Finally, the two EPS connectors provide compatibility with the high-end mainboard, but they should be installed on dedicated cables—all in all, an excellent power supply.

5. Cooler Master V750 Gold V2

Best PSU: Up to 750 Watts

SPECIFICATIONS

Manufacturer (OEM): Gospower
Max. DC Output: 750W
Efficiency: 80 PLUS Gold, Cybenetics Platinum
Noise: Cybenetics A- (25-30 dB[A])
Form Factor: ATX12V v2.4, EPS 2.92
Cooling: 135mm Fluid Dynamic Bearing Fan (HA13525M12F-Z)
Modular: Fully modular
Connectors: 2x EPS, 4x PCIe
Warranty: 10 years

REASONS TO BUY

+
Full power at 47 degrees Celsius
+
Correctly set protection features
+
High overall performance
+
Quiet operation
+
Good build quality
+
Highly Efficient
+
Efficient 5VSB rail
+
Long hold-up time
+
Low inrush currents
+
Fully modular
+
Compatible with the alternative sleep mode
+
10-year warranty

REASONS TO AVOID

-
A bit tighter load regulation at 12V would be nice
-
The APFC converter needs some fine-tuning
-
Small distance between connectors

The Cooler Master V750 Gold V2 is an impressive product from an OEM that is not widely known. Actually, only Cooler Master has used this OEM, Gospower, so far. The overall performance that the V750 achieves is top of the line, managing to surpass tough opponents like the new Corsair RM750x and the EVGA SuperNOVA 750 G6. It is the first time in many years that we've seen a Cooler Master PSU topping our charts, which means that Cooler Master's power team is on the right track again.

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