Buying Guide
The Best Power Supplies for the RTX 4080 and 4080 Super
Six 750W and 850W units with native 12V-2x6 cables for the RTX 4080 and 4080 Super, which NVIDIA pairs with 750W.
By The PC Journal editorial team
12 min read6 products evaluated
NVIDIA recommends a 750W power supply for both the RTX 4080 and RTX 4080 Super, which use a 16-pin connector. Step up to 850W if you run a high-power CPU.
We compared wattage, connectors and ratings from the power supply listings against the card maker's guidance; we did not load-test these units.
Quick Picks
Our 6 recommendations at a glance. Tap a pick for the full verdict.
Best Match for an RTX 4080
CORSAIR RM750x (ATX 3.1)
750W, fully modular, with a native 12V-2x6 and Cybenetics Gold.
Best for: Most RTX 4080 builds.
Our take Check price for CORSAIR RM750x (ATX 3.1) (opens in a new tab)
Best Value 750W
ASRock Phantom Gaming PG-750G
A 90-degree 12V-2x6 cable with a sensor and a 10-year warranty.
Best for: Tight cable runs.
Our take Check price for ASRock Phantom Gaming PG-750G (opens in a new tab)
Most Efficient 750W
be quiet! Pure Power 13 M 750W
A Cybenetics Platinum rating with four PCIe 8-pin connectors.
Best for: Quiet, efficient builds.
Our take Check price for be quiet! Pure Power 13 M 750W (opens in a new tab)
Best Compact 750W
MSI MAG A750GL PCIE5
A compact body with a 10-year warranty.
Best for: Smaller cases.
Our take Check price for MSI MAG A750GL PCIE5 (opens in a new tab)
Best White Pick
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 850W Headroom
Thermaltake Toughpower GT 850W
850W with Smart Zero Fan.
Best for: High-power CPUs.
Our take Check price for Thermaltake Toughpower GT 850W (opens in a new tab)
Our Picks
Best Match for an RTX 40801 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 native 12V-2x6 cable and a Cybenetics Gold rating.
Best for
- Most RTX 4080 builds.
Skip if
- Its warranty is not published, which rules it out if you need that number.
Why we like it
It is Cybenetics Gold rated at up to 91% efficiency, and its embossed cables with low-profile combs are easy to route. On rated output it ties with the ASRock Phantom Gaming PG-750G, the be quiet! Pure Power 13 M 750W and the MSI MAG A750GL PCIE5 at 750W. No other pick in this guide offers a gold cybenetics rating; compare the ASRock Steel Legend SL-850GW White, which has a platinum cybenetics rating.
The CORSAIR RM750x comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the CORSAIR RM750x, 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 MSI MAG A750GL PCIE5 and the rest. The maker doesn't give its warranty; if that figure matters, the ASRock Phantom Gaming PG-750G 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 ASRock Phantom Gaming PG-750G at the time of writing
Best Value 750W2 of 6
ASRock Phantom Gaming PG-750G on Amazon (opens in a new tab)
ASRock's Phantom Gaming PG-750G has a 90-degree 12V-2x6 cable with a temperature sensor, braided cables and a 10-year warranty.
Best for
- Tight cable runs.
Skip if
- Skip it if this is a deal-breaker for you: rated output of 750W, behind the ASRock Steel Legend SL-850GW White (850W).
Why we like it
It is 150mm deep and rated Cybenetics Platinum. It is fully modular with braided cables and a 90-degree PCIe 5.1 connector that has a temperature sensor. ASRock rates its efficiency 2% above the Gold standard.
On rated output it ties with the CORSAIR RM750x, the be quiet! Pure Power 13 M 750W and the MSI MAG A750GL PCIE5 at 750W. It matches the MSI MAG A750GL PCIE5 and the ASRock Steel Legend SL-850GW White on warranty (10 years). Like the be quiet! Pure Power 13 M 750W and ASRock Steel Legend SL-850GW White, it has a platinum cybenetics rating, while the CORSAIR RM750x uses a gold cybenetics rating.
The ASRock Phantom Gaming PG-750G comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. At 150mm deep, compare it with your case's PSU clearance before buying. It undercut the Thermaltake Toughpower GT 850W and every other pick on price at the time of writing.
Key dimensions & specs
- Wattage: 750W
- 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
- Colour: Black
Pros
- A 750W rating
- A native 12V-2x6 cable for 16-pin cards
- A 10-year warranty
- ATX 3.1 compliance
Cons
- Rated output of 750W, behind the ASRock Steel Legend SL-850GW White (850W)
Most Efficient 750W3 of 6
be quiet! Pure Power 13 M 750W on Amazon (opens in a new tab)
be quiet!'s Pure Power 13 M 750W offers four PCIe 8-pin connectors plus a native 12V-2x6, and its fan switches off at low load.
Best for
- Quiet, efficient builds.
Skip if
- Its warranty is not published, which rules it out if you need that number.
Why we like it
Cybenetics rates it Platinum. Its fan stops completely at low load, and one strong 12V rail handles GPU power spikes. LLC topology gives tight voltage regulation.
On rated output it ties with the CORSAIR RM750x, the ASRock Phantom Gaming PG-750G and the MSI MAG A750GL PCIE5 at 750W. Like the ASRock Phantom Gaming PG-750G and ASRock Steel Legend SL-850GW White, it has a platinum cybenetics rating, while the CORSAIR RM750x uses a gold cybenetics rating. No depth is rated for the be quiet! Pure Power 13 M 750W, so check the maker's page against your case's PSU bay.
On price it sat fourth of 6, between the cheaper ASRock Steel Legend SL-850GW White and the pricier MSI MAG A750GL PCIE5, at the time of writing. The maker doesn't give its warranty; if that figure matters, the ASRock Phantom Gaming PG-750G offers 10 years.
Key dimensions & specs
- Wattage: 750W
- Native 12V-2x6 cables: 1
- PCIe 8-pin connectors: 4
- 80 Plus rating: Gold
- Cybenetics rating: Platinum
- ATX version: ATX 3.1
- Form factor: ATX
- Fan stop: Yes
- Colour: Black
Pros
- A 750W rating
- A native 12V-2x6 cable for 16-pin cards
- 4 PCIe 8-pin connectors for older cards
- ATX 3.1 compliance
Cons
- No published warranty
- Costs more than the ASRock Phantom Gaming PG-750G at the time of writing
Best Compact 750W4 of 6
MSI MAG A750GL PCIE5 on Amazon (opens in a new tab)
MSI's MAG A750GL PCIE5 is a fully modular 750W unit with a native 12V-2x6 cable and a 10-year warranty, in a compact body.
Best for
- Smaller cases.
Skip if
- Skip it if rated output matters most to you; the ASRock Steel Legend SL-850GW White offers 850W.
Why we like it
It is 80 Plus Gold rated and carries a 10-year limited warranty. On rated output it ties with the CORSAIR RM750x, the ASRock Phantom Gaming PG-750G and the be quiet! Pure Power 13 M 750W at 750W. It matches the ASRock Phantom Gaming PG-750G and the ASRock Steel Legend SL-850GW White on warranty (10 years).
It also offers a compact body MSI markets for easier fitting. No depth is rated for the MSI MAG A750GL PCIE5, so check the maker's page against your case's PSU bay. On price it sat fifth of 6, between the cheaper be quiet! Pure Power 13 M 750W and the pricier CORSAIR RM750x, at the time of writing.
Key dimensions & specs
- Wattage: 750W
- Native 12V-2x6 cables: 1
- Warranty: 10 years
- 80 Plus 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
- A 10-year warranty
- ATX 3.1 compliance
Cons
- Rated output trails the ASRock Steel Legend SL-850GW White (850W)
- Costs more than the ASRock Phantom Gaming PG-750G at the time of writing
Best White Pick5 of 6
ASRock Steel Legend SL-850GW White on Amazon (opens in a new tab)
ASRock's Steel Legend SL-850GW is a white 850W unit, 150mm deep, with a dual-color 12V-2x6 cable and a 10-year warranty.
Best for
- White builds.
Skip if
- Price-first buyers should look at the ASRock Phantom Gaming PG-750G, which cost less when we checked.
Why we like it
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 Thermaltake Toughpower GT 850W on rated output (850W).
On warranty it ties with the ASRock Phantom Gaming PG-750G and the MSI MAG A750GL PCIE5 at 10 years. It shares a platinum cybenetics rating with the ASRock Phantom Gaming PG-750G and be quiet! Pure Power 13 M 750W; the CORSAIR RM750x goes with a gold cybenetics rating. It is the only pick here with a white colour; the MSI MAG A750GL PCIE5 has a black colour instead.
The ASRock Steel Legend SL-850GW White comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. At 150mm deep, compare it with your case's PSU clearance before buying. When we checked, only the Thermaltake Toughpower GT 850W and cheaper picks cost less, and the be quiet! Pure Power 13 M 750W cost more.
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 ASRock Phantom Gaming PG-750G at the time of writing
Best 850W Headroom6 of 6
Thermaltake Toughpower GT 850W on Amazon (opens in a new tab)
Thermaltake's Toughpower GT 850W is a fully modular ATX 3.1 unit with a native 12V-2x6 cable, a single high-amperage 12V rail and a Smart Zero Fan mode.
Best for
- High-power CPUs.
Skip if
- Choose another pick if you can't accept this: a shorter 5-year warranty.
Why we like it
Smart Zero Fan keeps the fan off at low load, and its low-profile flat black cables are easy to route. It is 80 Plus Gold rated at up to 90% efficiency. It matches the ASRock Steel Legend SL-850GW White on rated output (850W).
On warranty it trails the group at 5 years, while the ASRock Phantom Gaming PG-750G offers 10 years. The Thermaltake Toughpower GT 850W comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the Thermaltake Toughpower GT 850W, so check the maker's page against your case's PSU bay.
When we checked, only the ASRock Phantom Gaming PG-750G cost less, and the ASRock Steel Legend SL-850GW White cost more. Native 12V-2x6 cable count is its weakest area, and the CORSAIR RM750x covers it better at 1.
Key dimensions & specs
- Wattage: 850W
- Native 12V-2x6 cables: 1
- Warranty: 5 years
- 80 Plus rating: Gold
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan stop: Yes
- Colour: Black
Pros
- A 850W rating
- A native 12V-2x6 cable for 16-pin cards
- ATX 3.1 compliance
- Fully modular cables
Cons
- A shorter 5-year warranty
- Warranty trails the ASRock Phantom Gaming PG-750G (10 years)
- Costs more than the ASRock Phantom Gaming PG-750G at the time of writing
How We Chose
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 a PSUs for RTX 4080
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.
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.
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.
How to Choose a PSUs for RTX 4080
By priority
| Priority | Consider | Why |
|---|---|---|
| Most RTX 4080 builds | CORSAIR RM750x | 750W, fully modular, with a native 12V-2x6 and Cybenetics Gold |
| Tight cable runs | ASRock Phantom Gaming PG-750G | A 90-degree 12V-2x6 cable with a sensor and a 10-year warranty |
| Quiet, efficient builds | be quiet! Pure Power 13 M 750W | A Cybenetics Platinum rating with four PCIe 8-pin connectors |
| Smaller cases | MSI MAG A750GL PCIE5 | A compact body with a 10-year warranty |
| White builds | ASRock Steel Legend SL-850GW White | A white 850W unit with a 10-year warranty |
| High-power CPUs | Thermaltake Toughpower GT 850W | 850W with Smart Zero Fan |
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 | Depth |
|---|---|---|---|---|
| CORSAIR RM750x | 750W | 1 | Not listed | Not listed |
| ASRock Phantom Gaming PG-750G | 750W | 1 | 10 years | 150mm |
| be quiet! Pure Power 13 M 750W | 750W | 1 | Not listed | Not listed |
| MSI MAG A750GL PCIE5 | 750W | 1 | 10 years | Not listed |
| ASRock Steel Legend SL-850GW White | 850W | 1 | 10 years | 150mm |
| Thermaltake Toughpower GT 850W | 850W | 1 | 5 years | Not listed |
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 | ASRock Phantom Gaming PG-750G, Thermaltake Toughpower GT 850W, ASRock Steel Legend SL-850GW White, be quiet! Pure Power 13 M 750W, MSI MAG A750GL PCIE5 |
| About $100 to $150 | CORSAIR RM750x |
Frequently Asked Questions
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.
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.
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 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.
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.
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.
Bottom Line
Corsair's RM750x is the best-matched unit for an RTX 4080 here. ASRock's PG-750G is the value pick with a 90-degree cable, and the 850W units add headroom.