Buying Guide
The Best Power Supplies for Gaming PCs
Six power supplies from 650W to 1000W, including a white and an SFX unit, compared on wattage, connectors and warranty.
By The PC Journal editorial team
12 min read6 products evaluated
The right power supply depends on your graphics card first. Start from the card maker's recommended wattage, then check for a native 12V-2x6 cable, the form factor your case takes, and the warranty.
We compared wattage, efficiency ratings, connectors and warranty from each listing; we did not load-test these units.
Quick Picks
Our 6 recommendations at a glance. Tap a pick for the full verdict.

Best 750W
CORSAIR RM750x (ATX 3.1)
A fully modular ATX 3.1 unit with Cybenetics Gold.
Best for: Most gaming PCs.
Our take Check price for CORSAIR RM750x (ATX 3.1) (opens in a new tab)

Most Efficient
be quiet! Power Zone 2 850W
Platinum from both 80 Plus and Cybenetics.
Best for: Quiet high-end builds.
Our take Check price for be quiet! Power Zone 2 850W (opens in a new tab)

Best 1000W
NZXT C1000 Gold Core (ATX 3.1)
1000W with a 7-year warranty and Zero Fan mode.
Best for: High-end GPUs.
Our take Check price for NZXT C1000 Gold Core (ATX 3.1) (opens in a new tab)

Best Budget
MONTECH Century II 650W
650W Gold with a 10-year warranty.
Best for: Mid-range builds.
Our take Check price for MONTECH Century II 650W (opens in a new tab)

Best White
ASRock Steel Legend SL-850GW White
A white 850W unit with a 10-year warranty.
Best for: White builds.
Our take Check price for ASRock Steel Legend SL-850GW White (opens in a new tab)

Best SFX
CORSAIR SF750 (2024)
750W Platinum in SFX size.
Best for: Small cases.
Our take Check price for CORSAIR SF750 (2024) (opens in a new tab)
| Pick | Why it’s here | Best for | Price |
|---|---|---|---|
![]() | A fully modular ATX 3.1 unit with Cybenetics Gold. | Most gaming PCs. | Check price for CORSAIR RM750x (ATX 3.1) (opens in a new tab) |
![]() | Platinum from both 80 Plus and Cybenetics. | Quiet high-end builds. | Check price for be quiet! Power Zone 2 850W (opens in a new tab) |
![]() | 1000W with a 7-year warranty and Zero Fan mode. | High-end GPUs. | Check price for NZXT C1000 Gold Core (ATX 3.1) (opens in a new tab) |
![]() | 650W Gold with a 10-year warranty. | Mid-range builds. | Check price for MONTECH Century II 650W (opens in a new tab) |
![]() | A white 850W unit with a 10-year warranty. | White builds. | Check price for ASRock Steel Legend SL-850GW White (opens in a new tab) |
![]() | 750W Platinum in SFX size. | Small cases. | Check price for CORSAIR SF750 (2024) (opens in a new tab) |
Our Picks
Best 750W1 of 6
CORSAIR RM750x (ATX 3.1) on Amazon (opens in a new tab)
Corsair's RM750x is a fully modular ATX 3.1 unit with a Cybenetics Gold rating.
Best for
- Most gaming PCs.
Skip if
- The maker gives no warranty, so look elsewhere if that figure decides it for you.
Why we like it
It includes a native 12V-2x6 cable, so 16-pin cards need no adapter. It is Cybenetics Gold rated at up to 91% efficiency, and its embossed cables with low-profile combs are easy to route. It is the only pick here with a gold cybenetics rating; the be quiet! Power Zone 2 850W has a platinum cybenetics rating instead.
No depth is rated for the CORSAIR RM750x, so check the maker's page against your case's PSU bay. Its price falls between the ASRock Steel Legend SL-850GW White and the NZXT C1000 Gold Core, based on our last check. Buyers who need a confirmed warranty should compare it with the MONTECH Century II 650W, which offers 10 years.
Key dimensions & specs
- Wattage: 750W
- Native 12V-2x6 cables: 1
- Cybenetics rating: Gold
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Colour: Black
Pros
- A 750W rating
- A native 12V-2x6 cable for 16-pin cards
- ATX 3.1 compliance
- Fully modular cables
Cons
- No published warranty
- Costs more than the MONTECH Century II 650W at the time of writing
Most Efficient2 of 6
be quiet! Power Zone 2 850W on Amazon (opens in a new tab)
be quiet!'s Power Zone 2 850W is rated Platinum by both 80 Plus and Cybenetics.
Best for
- Quiet high-end builds.
Skip if
- Its warranty is not published, which rules it out if you need that number.
Why we like it
Its 140mm Pure Wings 3 fan stops at low load, and it has a native 12V-2x6 cable. On rated output it ties with the ASRock Steel Legend SL-850GW White at 850W. It shares a platinum 80 plus rating with the CORSAIR SF750; the NZXT C1000 Gold Core goes with a gold 80 plus rating.
Like the NZXT C1000 Gold Core and ASRock Steel Legend SL-850GW White, it has a platinum cybenetics rating, while the CORSAIR RM750x uses a gold cybenetics rating. The be quiet! Power Zone 2 850W comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. It also has 3 PCIe 8-pin connectors for cards that use 8-pin power.
On price it sat fifth of 6, between the cheaper NZXT C1000 Gold Core and the pricier CORSAIR SF750, at the time of writing. The maker doesn't give its warranty; if that figure matters, the MONTECH Century II 650W offers 10 years.
Key dimensions & specs
- Wattage: 850W
- Native 12V-2x6 cables: 1
- PCIe 8-pin connectors: 3
- 80 Plus rating: Platinum
- Cybenetics rating: Platinum
- ATX version: ATX 3.1
- Form factor: ATX
- Fan: 140mm
- Fan stop: Yes
- Colour: Black
Pros
- A 850W rating
- A native 12V-2x6 cable for 16-pin cards
- 80 Plus Platinum efficiency
- ATX 3.1 compliance
Cons
- No published warranty
- Costs more than the MONTECH Century II 650W at the time of writing
Best 1000W3 of 6
NZXT C1000 Gold Core (ATX 3.1) on Amazon (opens in a new tab)
NZXT's C1000 Gold Core is rated Gold by 80 Plus and Platinum by Cybenetics.
Best for
- High-end GPUs.
Skip if
- Skip it if warranty matters most to you; the MONTECH Century II 650W offers 10 years.
Why we like it
A 135mm fluid-dynamic-bearing fan stops at low load, and the warranty runs seven years. It uses 105°C-rated capacitors, embossed modular cables and a dual-colour 12V-2x6 connector. Its 1000W rated output is the highest here; the be quiet! Power Zone 2 850W comes next at 850W.
Its 7 years warranty is the shortest in this group; the MONTECH Century II 650W leads at 10 years. It shares a gold 80 plus rating with the MONTECH Century II 650W and ASRock Steel Legend SL-850GW White; the CORSAIR SF750 goes with a platinum 80 plus rating. You also get Cybenetics noise certification listed by NZXT and a 135mm FDB fan with zero-RPM mode.
The NZXT C1000 Gold Core comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the NZXT C1000 Gold Core, so check the maker's page against your case's PSU bay.
Key dimensions & specs
- Wattage: 1000W
- Native 12V-2x6 cables: 1
- Warranty: 7 years
- 80 Plus rating: Gold
- Cybenetics rating: Platinum
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan: 135mm
- Fan stop: Yes
- Colour: Black
Pros
- 1000W of rated output for high-power cards
- A native 12V-2x6 cable for 16-pin cards
- ATX 3.1 compliance
- Fully modular cables
Cons
- Warranty trails the MONTECH Century II 650W (10 years)
- Costs more than the MONTECH Century II 650W at the time of writing
Best Budget4 of 6
MONTECH Century II 650W on Amazon (opens in a new tab)
Montech's Century II 650W brings a native 12V-2x6 cable, fully modular cables and a 10-year warranty to a low-cost 80 Plus Gold unit.
Best for
- Mid-range builds.
Skip if
- Skip it if rated output matters most to you; the NZXT C1000 Gold Core offers 1000W.
Why we like it
Its 135mm FDB fan has a zero RPM mode, and it uses 100% Japanese capacitors. On rated output it trails the group at 650W, while the NZXT C1000 Gold Core offers 1000W. It matches the ASRock Steel Legend SL-850GW White on warranty (10 years).
It shares a gold 80 plus rating with the NZXT C1000 Gold Core and ASRock Steel Legend SL-850GW White; the CORSAIR SF750 goes with a platinum 80 plus rating. The MONTECH Century II 650W comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the MONTECH Century II 650W, so check the maker's page against your case's PSU bay. It undercut the ASRock Steel Legend SL-850GW White and every other pick on price at the time of writing.
Key dimensions & specs
- Wattage: 650W
- Native 12V-2x6 cables: 1
- Warranty: 10 years
- 80 Plus rating: Gold
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan: 135mm
- Fan stop: Yes
- Colour: Black
Pros
- A 650W rating
- A native 12V-2x6 cable for 16-pin cards
- A 10-year warranty
- ATX 3.1 compliance
Cons
- Rated output trails the NZXT C1000 Gold Core (1000W)
Best White5 of 6
ASRock Steel Legend SL-850GW White on Amazon (opens in a new tab)
ASRock's SL-850GW is a white, fully modular 850W unit with a two-tone 12V-2x6 cable.
Best for
- White builds.
Skip if
- If budget leads, the MONTECH Century II 650W was cheaper at our last price check.
Why we like it
It carries a Cybenetics Platinum rating, a 150mm depth and a 10-year warranty. Its compact 150mm-deep body helps in smaller cases, and iCOOL fan control adjusts speed to load. The white finish suits light builds.
It matches the be quiet! Power Zone 2 850W on rated output (850W). On warranty it ties with the MONTECH Century II 650W at 10 years. Like the NZXT C1000 Gold Core and MONTECH Century II 650W, it has a gold 80 plus rating, while the be quiet! Power Zone 2 850W uses a platinum 80 plus rating.
No other pick in this guide offers a white colour; compare the CORSAIR RM750x, which has a black colour. It was priced above the MONTECH Century II 650W and below the CORSAIR RM750x at the time of writing. It gives ground on native 12V-2x6 cable count, where the CORSAIR RM750x offers 1.
Key dimensions & specs
- Wattage: 850W
- Native 12V-2x6 cables: 1
- Warranty: 10 years
- Depth: 150mm
- 80 Plus rating: Gold
- Cybenetics rating: Platinum
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan: 135mm
- Colour: White
Pros
- A 850W rating
- A native 12V-2x6 cable for 16-pin cards
- A 10-year warranty
- ATX 3.1 compliance
Cons
- Costs more than the MONTECH Century II 650W at the time of writing
Best SFX6 of 6
CORSAIR SF750 (2024) on Amazon (opens in a new tab)
Corsair's 2024 SF750 is a fully modular 80 Plus Platinum SFX unit with ATX 3.1 support.
Best for
- Small cases.
Skip if
- Its native 12V-2x6 cable count is not published, which rules it out if you need that number.
Why we like it
It uses a 92mm fluid-dynamic-bearing fan and 105C-rated Japanese capacitors. On rated output it ties with the CORSAIR RM750x at 750W. It shares a platinum 80 plus rating with the be quiet! Power Zone 2 850W; the ASRock Steel Legend SL-850GW White goes with a gold 80 plus rating.
The CORSAIR SF750 has no stated native 12V-2x6 cable; confirm the cable kit before pairing it with a 16-pin card. No depth is rated for the CORSAIR SF750, so check the maker's page against your case's PSU bay. It was the highest-priced of the 6 picks at the time of writing, so the case for it rests on what it adds over the be quiet! Power Zone 2 850W and the rest. The maker doesn't give its native 12V-2x6 cable count; if that figure matters, the CORSAIR RM750x offers 1.
Key dimensions & specs
- Wattage: 750W
- 80 Plus rating: Platinum
- ATX version: ATX 3.1
- Form factor: SFX
- Cabling: Fully modular
- Fan: 92mm
- Colour: Black
Pros
- A 750W rating
- 80 Plus Platinum efficiency
- ATX 3.1 compliance
- Fully modular cables
Cons
- No published native 12V-2x6 cable count
- No published warranty
- Costs more than the MONTECH Century II 650W at the time of writing
How We Chose These Power Supplies
Each pick was assessed across 4 criteria weighted for real-world use.
- Wattage
- We compared rated output with NVIDIA's or AMD's recommended system power for the card.
- Price
- We grouped picks by price at the time of writing.
- Connectors
- We recorded native 12V-2x6 cables and PCIe 8-pin connectors where the listing states them.
- Standards
- We noted ATX version, 80 Plus and Cybenetics ratings.
What to Look for in Power Supplies
Key buying criteria so you get the right fit the first time.
Start from the card maker's PSU figure
NVIDIA and AMD publish a recommended total system power for each card, and partner cards often state their own. Treat that figure as the floor, then add headroom for a high-power CPU.
More wattage than you need does not harm anything; it mostly costs money.
Match the power connector
Most RTX 40 and RTX 50 cards use a single 16-pin 12V-2x6 (12VHPWR) plug, while many Radeon cards use two or three 8-pin plugs. A native cable avoids bulky adapters.
Push the 16-pin plug fully home and avoid a sharp bend right at the connector.
Use the warranty as a quality signal
Long warranties of seven to twelve years show how long a maker expects a unit to last. A power supply often moves from one build to the next, so the warranty matters.
Prefer ATX 3.1
ATX 3.1 units are designed for the brief power spikes modern graphics cards produce and ship with the revised 12V-2x6 connector. Older units can still work, but check the maker's guidance for your card.
Compare efficiency ratings
80 Plus and Cybenetics ratings describe how much power turns into heat. Gold is the usual target for a gaming PC; Platinum and Titanium run cooler and cost more.
Check depth and cabling
Deeper units can clash with drive cages or front radiators. Fully modular cables make routing easier in tight cases.
How to Choose Power Supplies
By priority
| Priority | Consider | Why |
|---|---|---|
| Most gaming PCs | CORSAIR RM750x | A fully modular ATX 3.1 unit with Cybenetics Gold |
| Quiet high-end builds | be quiet! Power Zone 2 850W | Platinum from both 80 Plus and Cybenetics |
| High-end GPUs | NZXT C1000 Gold Core | 1000W with a 7-year warranty and Zero Fan mode |
| Mid-range builds | MONTECH Century II 650W | 650W Gold with a 10-year warranty |
| White builds | ASRock Steel Legend SL-850GW White | A white 850W unit with a 10-year warranty |
| Small cases | CORSAIR SF750 | 750W Platinum in SFX size |
Scroll sideways to see every column.
Key specs side by side
Figures as each maker states them.
| Power supplie | Wattage | Native 12V-2x6 cables | Warranty | 80 Plus rating |
|---|---|---|---|---|
| CORSAIR RM750x | 750W | 1 | Not listed | Not listed |
| be quiet! Power Zone 2 850W | 850W | 1 | Not listed | Platinum |
| NZXT C1000 Gold Core | 1000W | 1 | 7 years | Gold |
| MONTECH Century II 650W | 650W | 1 | 10 years | Gold |
| ASRock Steel Legend SL-850GW White | 850W | 1 | 10 years | Gold |
| CORSAIR SF750 | 750W | Not listed | Not listed | Platinum |
Scroll sideways to see every column.
By price at the time of writing
Prices change often; these tiers reflect Amazon prices when this guide was updated.
| Price tier | Power supplies |
|---|---|
| About $50 to $100 | MONTECH Century II 650W, ASRock Steel Legend SL-850GW White |
| About $100 to $150 | CORSAIR RM750x, NZXT C1000 Gold Core, be quiet! Power Zone 2 850W |
| About $150 to $250 | CORSAIR SF750 |
Frequently Asked Questions
Can I use an SFX power supply?
Yes, if the case supports SFX and the unit meets the wattage and connector needs of your card. SFX units cost more per watt.
Can I reuse the power supply from my old PC?
Only if it meets the card's wattage and connector needs and is still under warranty or in good health. Very old units lack modern connectors.
Is an ATX 3.0 power supply still fine?
Generally yes. ATX 3.1 mainly revises the connector to 12V-2x6 and relaxes some spike requirements; check your unit's cable is rated for your card.
Can I use the 16-pin adapter that came with my graphics card?
Yes, if it is the maker's own adapter and every 8-pin plug on it is connected. A native 12V-2x6 cable is tidier and has fewer joins.
How much headroom should I leave above the recommended wattage?
The card maker's figure already covers a typical system. Add 100 to 150W if you run a high-power CPU or plan a bigger card later.
Does a Platinum unit save much on electricity?
Only a little for most gaming PCs. The main gains are less heat and often a quieter fan.
Bottom Line
Corsair's RM750x is the best power supply for most gaming PCs. be quiet!'s Power Zone 2 is the efficient pick, NZXT's C1000 Gold Core covers high-end cards, and Montech's Century II 650W keeps costs down.
