The Best PSUs for Your Gaming PC

Corsair RM1000x Overview

If we were putting together a powerful gaming PC today and wanted one power supply that made sense for both the current system and future upgrades, we’d start with Corsair’s RM1000x.

Specifically, we’re recommending the newer ATX 3.1 version of the RM1000x.

That distinction is important because Corsair has sold several generations of RMx power supplies.

The current version brings the series up to date with ATX 3.1 and PCIe 5.1 support and includes a native 12V-2×6 GPU connection.

The included 12V-2×6 cable can deliver up to 600 watts, making it appropriate for modern high-end graphics cards that use the newer 16-pin power connection.

That gives you a much cleaner solution than running several conventional PCIe power cables into an adapter.

The 1000W capacity is also a good fit for where high-end gaming systems have ended up.

You absolutely do not need a 1000W power supply for every gaming PC.

A more efficient mid-range system could operate perfectly well from a quality 650W, 750W, or 850W unit.

But once you’re combining a flagship-class graphics card with a high-end processor, several drives, large numbers of fans, liquid cooling, and other accessories, the additional headroom becomes useful.

A 1000W unit can also make sense if you intend to keep your PSU for several generations of hardware.

Unlike a CPU or graphics card, a good power supply can easily survive several major PC upgrades.

The RM1000x is fully modular as well.

You only need to connect the cables your particular build requires, which makes cable management considerably easier than it would be with a non-modular power supply.

Cooling comes from a 140mm fluid-dynamic-bearing fan.

Corsair’s Zero RPM functionality allows the fan to remain stopped under sufficiently light loads, while a manual fan-control knob on the rear gives you additional control over its behavior.

Corsair rates the current RMx platform at Cybenetics Gold efficiency and backs the unit with a 10-year warranty.

There are more efficient power supplies.

There are also significantly more powerful power supplies.

But neither necessarily makes more sense for the average high-end gaming PC.

What makes the RM1000x our favorite overall option is its balance.

You get plenty of capacity, modern GPU connectivity, the newer ATX standard, modular cabling, quiet cooling, a long warranty, and enough power to accommodate hardware far beyond what most gaming PCs actually use.

For a new high-end build, that’s exactly what we’d want.

MSI MEG Ai1600T PCIE5 Overview

Most people should not buy a 1600W power supply.

If your gaming PC contains one mid-range or high-end graphics card and a conventional desktop processor, there are far less expensive options that will work perfectly well.

The MSI MEG Ai1600T PCIE5 is for the builds that aren’t particularly concerned with being sensible.

Its headline specification is obviously the 1600W capacity.

That’s enough power for extremely demanding combinations of high-end CPUs, flagship graphics hardware, extensive cooling, storage, and additional expansion hardware.

But raw wattage isn’t the only reason to consider it.

The Ai1600T is an ATX 3.1 and PCIe 5.1-ready platform with two native 12V-2×6 connections.

That gives the unit considerably more flexibility for unusually demanding hardware configurations than you’d get from a conventional 850W or 1000W PSU.

It’s also designed to tolerate the large, short-duration power excursions that modern hardware can generate.

That matters because a system’s average power consumption doesn’t tell the entire story.

A graphics card can demand substantially more power for a very short period than its normal sustained consumption would suggest.

Modern ATX specifications take those transient loads into account.

Efficiency is another major part of the Ai1600T’s appeal.

MSI lists Titanium certification from 80 PLUS, Cybenetics, and PPLP.

In a system capable of pulling an enormous amount of power, reducing the amount of energy lost as heat becomes increasingly useful.

The unit also uses 105°C-rated Japanese capacitors and a fully digital design with a control MCU.

MSI Center can be used for monitoring and fan-related controls, giving enthusiasts more visibility into the power supply than they’d get with a completely conventional unit.

Cooling is handled by a 135mm double-ball-bearing fan, and MSI provides a Zero Fan mode that can shut the fan off at lighter loads.

And whereas most premium power supplies carry 10-year warranties, MSI backs the Ai1600T for 12 years.

That makes sense for a component this expensive.

If you’re spending this much on a PSU, you’d reasonably expect to carry it through several generations of hardware.

For the vast majority of gaming PCs, we’d still buy the RM1000x, A850GL, or another smaller unit and put the savings toward components that actually improve gaming performance.

But if you’re deliberately building an extreme system and want an equally extreme power supply, the Ai1600T is one of the most complete options available.

be quiet! Dark Power 14 Overview

There is a point where buying a more expensive power supply stops being about getting something you need and starts becoming about getting something better than you need.

The be quiet! Dark Power 14 sits firmly in that category.

For a normal gaming system, a good 80 PLUS Gold PSU will do the job for considerably less money.

But if you’re putting together a premium build and want efficiency, low noise, modern connectivity, and high-end construction to match the rest of the system, the Dark Power 14 makes a lot of sense.

We’re specifically linking to the 1200W model, although be quiet! also offers 1000W and 850W versions.

The 1200W unit is certified for both 80 PLUS Titanium and Cybenetics Titanium efficiency.

Higher efficiency means less of the power coming from the wall is wasted as heat inside the power supply.

The practical difference in electricity cost between Gold and Titanium isn’t necessarily enough to justify buying the Dark Power 14 by itself.

But producing less waste heat can also help with cooling and noise, and those considerations become more meaningful as system power consumption increases.

be quiet! has put particular emphasis on cooling.

The Dark Power 14 uses one of the company’s Silent Wings fans and allows you to choose between active and semi-passive operation with a button on the rear of the PSU.

In active mode, the fan continuously runs at a low speed.

In semi-passive mode, it can stop at low loads and begin spinning when additional cooling is necessary.

That’s a nice feature because there isn’t universal agreement on which approach is better.

Some users want the PSU to remain completely silent whenever possible.

Others prefer continuous low-speed airflow rather than repeatedly stopping and starting the fan.

The Dark Power 14 lets you choose.

The 1200W model also gives you two native 12V-2×6 cables alongside conventional PCIe 6+2-pin connections.

That provides excellent compatibility with both newer and older high-end graphics hardware.

Another enthusiast-oriented feature is the ability to switch between the PSU’s default multi-rail operation and a high-powered single-rail configuration.

Most builders will never need to touch this.

But for heavily overclocked systems, the additional control can be useful.

Inside, be quiet! uses Japanese capacitors rated for operation at 105°C, and the fully modular sleeved cables help give a premium build a cleaner appearance.

A 10-year warranty rounds out the package.

Again, this isn’t the PSU we’d buy for a price-to-performance-oriented PC.

Spending extra money on a Titanium PSU isn’t going to make your games run faster.

But if you’ve already spent heavily on the CPU, graphics card, cooling, case, and everything else and want an equally premium PSU, the Dark Power 14 is an excellent choice.

Corsair SF1000 Overview

Building a small gaming PC used to mean accepting significant restrictions on how powerful the system could be.

That’s much less true today.

Modern Mini-ITX cases can accommodate enormous graphics cards, high-end CPUs, and surprisingly capable liquid-cooling configurations.

But fitting all of that hardware into a small chassis requires an equally compact power supply.

Corsair’s SF1000 is our favorite solution.

The most impressive specification is the combination of size and capacity.

This is a true SFX power supply—not a longer SFX-L unit—yet it can deliver 1000 watts.

That gives you enough power to build the kind of high-end small-form-factor system that would have required a much larger enclosure in the past.

It’s also fully up to date electrically.

The current SF1000 is ATX 3.1 compliant, supports PCIe 5.1, and includes a 12V-2×6 GPU cable.

So choosing a compact PSU doesn’t mean giving up the modern GPU connection you’d get from a larger premium ATX model.

Efficiency is particularly useful in a small case.

The SF1000 carries both 80 PLUS Platinum and Cybenetics Platinum efficiency ratings.

An SFF enclosure typically has less air volume and less room to separate heat-producing components.

Reducing the amount of waste heat generated inside the PSU is therefore especially welcome.

Corsair cools the unit with a 92mm fluid-dynamic-bearing fan.

Zero RPM operation allows the fan to stop under sufficiently light loads.

The smaller fan is one of the unavoidable consequences of the SFX form factor, but Corsair’s high efficiency helps reduce the amount of cooling the PSU requires in the first place.

The unit is fully modular and uses Corsair’s compact Type-5 Micro-Fit connections on the PSU side.

That matters in an ITX case.

Trying to stuff unused cables into an already crowded small-form-factor enclosure is exactly the kind of problem you want to avoid.

Corsair also uses 105°C-rated Japanese electrolytic capacitors and backs the SF1000 with a seven-year warranty.

There are cheaper SFX units and lower-wattage models that will make more sense for less demanding systems.

In fact, Corsair also offers the current SF platform in 750W and 850W capacities.

But the SF1000 is the model we’d choose if we’re already going through the expense and planning required to build a genuinely high-end Mini-ITX gaming PC.

You get ATX-class power capability without having to make room for an ATX power supply.

MSI MAG A850GL PCIE5 Overview

The sweet spot for a gaming power supply isn’t necessarily the highest wattage or efficiency rating you can afford.

It’s getting enough power and the features your system actually needs without spending money that would be better used elsewhere.

That’s why we like MSI’s MAG A850GL PCIE5 so much.

Its 850W capacity is enough for a huge range of modern gaming PCs.

For a system built around a mid-range or high-end graphics card, 850 watts gives you considerably more flexibility than a basic 550W or 650W unit without pushing you into the price range of premium 1000W-1600W power supplies.

The A850GL is also a modern ATX 3.1 platform.

It supports PCIe 5.1 and provides a native 16-pin GPU cable capable of supplying up to 600W on compatible hardware.

That makes it a much better option for a new build than saving a small amount of money on an older PSU and immediately having to depend on a graphics-card power adapter.

MSI uses a dual-color design on the 16-pin cable to make it easier to visually confirm that the connection has been inserted properly.

The unit is fully modular as well.

You can leave unused SATA, PCIe, and peripheral cables in the box rather than trying to hide them inside your case.

Another useful feature is its physical size.

At approximately 140mm deep, the A850GL is relatively compact for a high-capacity ATX power supply.

That’s useful even if you aren’t building a small PC.

Some cases place drive cages, cable-routing channels, or other components immediately in front of the PSU, and reducing the PSU’s depth gives you additional room to work.

Efficiency is rated at 80 PLUS Gold, and MSI uses a 120mm fluid-dynamic-bearing fan for cooling.

You also get the standard protection features we’d expect from a modern PSU, including over-voltage, over-current, over-power, over-temperature, short-circuit, and under-voltage protections.

MSI backs the A850GL with a 10-year warranty.

That warranty is especially important in this price category.

A value PSU shouldn’t mean buying something disposable that you’ll have to replace when you perform your next upgrade.

There are systems where we’d choose something larger.

If you’re installing one of the most power-hungry flagship GPUs available alongside a high-end processor, we’d seriously consider moving to a 1000W or larger PSU based on the hardware manufacturer’s recommendation.

But that isn’t what most gaming PCs look like.

For the much larger group of builders putting together a strong mainstream or high-end gaming PC, the A850GL gives you nearly everything we’d want without charging a premium for features you probably don’t need.

MSI MAG A650BN PCIE5 III Overview

A budget gaming PC doesn’t need a 1000W power supply.

In fact, overspending on your PSU can actively make the finished gaming PC slower if doing so forces you to reduce your graphics-card or processor budget.

The goal is to buy enough power from a reputable platform while avoiding the questionable no-name units that often populate the lowest end of the PSU market.

MSI’s MAG A650BN PCIE5 III is one of the more interesting budget options available because it brings several modern features into a relatively inexpensive 650W unit.

Most importantly, it is ATX 3.1 ready and supports PCIe 5.1.

You also get a native 12V-2×6 GPU connection.

MSI rates that connection for up to 300W on this particular model.

That’s an important detail.

The presence of a 12V-2×6 connector doesn’t magically turn a 650W budget PSU into something we’d pair with the most power-hungry flagship graphics card available.

You still need to choose the PSU capacity according to your complete system and follow the graphics-card manufacturer’s recommended power-supply rating.

For the lower-power graphics cards you’d realistically use in a budget or mid-range gaming PC, though, having the modern connector gives you useful flexibility.

The A650BN PCIE5 III also includes two conventional PCIe 6+2-pin connections, so you aren’t restricted to graphics cards that use the newer connector.

Efficiency is rated at 80 PLUS Bronze.

That’s a step down from the Gold, Platinum, and Titanium units elsewhere in this guide, but that’s perfectly reasonable at this price point.

An efficiency certification also shouldn’t be confused with an overall PSU quality rating.

Its primary purpose is to describe how efficiently the PSU converts AC power from the wall into the DC power your components use.

The A650BN uses a DC-to-DC design, active PFC, and includes protection against over-voltage, over-current, short circuits, over-power conditions, and under-voltage conditions.

Cooling is handled by a 120mm fan.

This is also a non-modular power supply.

Every cable is permanently attached, whether you use it or not.

That makes cable management less convenient than it would be with the A850GL or RM1000x.

But this is exactly the kind of compromise we’re willing to accept from a budget PSU.

Modular cabling is convenient.

It doesn’t make your graphics card faster.

If choosing a non-modular PSU allows you to put another $30-$50 into your GPU, that’s generally the trade we’d make in a lower-cost gaming system.

MSI also backs the unit with a five-year warranty.

If you’re building a powerful enthusiast PC, we’d spend more and move up this list.

But for an affordable system that simply needs a modern, appropriately sized PSU from an established manufacturer, the A650BN PCIE5 III is a compelling option.