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 Alex Morgan, PC Hardware Editor
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
Which of the 6 picks to look at first. Tap a name for the full analysis.
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.
Check price for CORSAIR RM750x (ATX 3.1) on Amazon (opens in a new tab)
Best Value 750W
ASRock Phantom Gaming PG-750GA 90-degree 12V-2x6 cable with a sensor and a 10-year warranty.
Best for: Tight cable runs.
Check price for ASRock Phantom Gaming PG-750G on Amazon (opens in a new tab)
Most Efficient 750W
be quiet! Pure Power 13 M 750WA Cybenetics Platinum rating with four PCIe 8-pin connectors.
Best for: Quiet, efficient builds.
Check price for be quiet! Pure Power 13 M 750W on Amazon (opens in a new tab)
Best Compact 750W
MSI MAG A750GL PCIE5A compact body with a 10-year warranty.
Best for: Smaller cases.
Check price for MSI MAG A750GL PCIE5 on Amazon (opens in a new tab)
Best White Pick
ASRock Steel Legend SL-850GW WhiteA white 850W unit with a 10-year warranty.
Best for: White builds.
Check price for ASRock Steel Legend SL-850GW White on Amazon (opens in a new tab)
Best 850W Headroom
Thermaltake Toughpower GT 850W850W with Smart Zero Fan.
Best for: High-power CPUs.
Check price for Thermaltake Toughpower GT 850W on Amazon (opens in a new tab)
Our Picks
Best Match for an RTX 40801 of 6
CORSAIR RM750x (ATX 3.1)
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.
Key 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
The catch
The maker doesn't give its warranty; if that figure matters, the ASRock Phantom Gaming PG-750G offers 10 years.
Best Value 750W2 of 6
ASRock Phantom Gaming PG-750G
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.
The 12V-2x6 cable is dual-color and rated to 105 degrees C, and ASRock lists iCOOL intelligent fan control and 220% total power excursion. It measures 5.91 x 5.91 x 3.39 inches, and ASRock notes it is not compatible with all prebuilt systems. 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). It undercut the Thermaltake Toughpower GT 850W and every other pick on price at the time of writing.
Key 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)
The catch
The main gap: rated output of 750W, behind the ASRock Steel Legend SL-850GW White (850W). If that matters, the ASRock Steel Legend SL-850GW White offers 850W.
Most Efficient 750W3 of 6
be quiet! Pure Power 13 M 750W
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.
It is 80 Plus Gold with up to 94.3% efficiency and an ATX 3.1 design with a native 12V-2x6 connector. All 750W sit on a single 12V rail, which handles short GPU power spikes. 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.
Key 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
The catch
The maker doesn't give its warranty; if that figure matters, the ASRock Phantom Gaming PG-750G offers 10 years.
Best Compact 750W4 of 6
MSI MAG A750GL PCIE5
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. It is fully modular, rated 80 Plus Gold, ATX 3.1 with PCIe 5.1, and carries a 10-year warranty. The cable is a native dual-color 12V-2x6 for 16-pin graphics cards, and the unit is ATX 3.1 and PCIe 5.1 ready.
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 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
The catch
The trade-off is rated output; for more, the ASRock Steel Legend SL-850GW White offers 850W.
Best White Pick5 of 6
ASRock Steel Legend SL-850GW White
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 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
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.
Key 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
The catch
Native 12V-2x6 cable count is its weakest area, and the CORSAIR RM750x covers it better at 1.
How We Chose
Alex Morgan compared the manufacturer specifications, connectivity, warranty terms and compatibility of every pick. Figures come from the makers unless a third-party source is named; we did not test these products ourselves.
- How these picks were ranked
- We set side by side six power supplies on rated output, native 12V-2x6 cable count, warranty and depth from manufacturer specifications. Nothing was tested in-house; 5 of the 11 fields compared are stated for every pick, while warranty and depth have gaps.
- What every pick has in common
- All 6, from the CORSAIR RM750x to the Thermaltake Toughpower GT 850W, state rated output, native 12V-2x6 cable count and ATX version and share ATX 3.1 ATX version.
- Where the specs have gaps
- The CORSAIR RM750x and the be quiet! Pure Power 13 M 750W give no warranty; the CORSAIR RM750x, the be quiet! Pure Power 13 M 750W, the MSI MAG A750GL PCIE5 and the Thermaltake Toughpower GT 850W give no depth.
- Price range
- At our last check the picks ran from the ASRock Phantom Gaming PG-750G ($50 to $100) to the CORSAIR RM750x ($100 to $150).
What to Look for in a PSUs for RTX 4080
Key buying criteria so you get the right fit the first time.
Rated output across these picks
Across these 6 picks rated output spans 750W (the MSI MAG A750GL PCIE5) to 850W (the ASRock Steel Legend SL-850GW White). The Thermaltake Toughpower GT 850W comes second at 850W, in the same price tier as the ASRock Steel Legend SL-850GW White.
How much warranty you need
The ASRock Phantom Gaming PG-750G tops warranty at 10 years and the Thermaltake Toughpower GT 850W sits lowest at 5 years; 3 picks share the top figure. The ASRock Phantom Gaming PG-750G is the pick for warranty. The CORSAIR RM750x and the be quiet! Pure Power 13 M 750W give no warranty figure, so 4 of 6 picks are compared here.
An 8-pin power connector held up to the camera Fit and compatibility
The CORSAIR RM750x comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter.
Extras that separate them
The MSI MAG A750GL PCIE5: a compact body MSI markets for easier fitting. The ASRock Steel Legend SL-850GW White: a 10-year warranty on a white unit. The Thermaltake Toughpower GT 850W: a single high-amperage 12V rail.
Modular cable sockets on the back of a power supply Where your budget lands
$50 to $100 buys the ASRock Phantom Gaming PG-750G, the Thermaltake Toughpower GT 850W, the ASRock Steel Legend SL-850GW White, the be quiet! Pure Power 13 M 750W and the MSI MAG A750GL PCIE5; $100 to $150 buys the CORSAIR RM750x at our last check.
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
The ASRock Steel Legend SL-850GW White leads on rated output at 850W, ahead of the Thermaltake Toughpower GT 850W at 850W. "Not listed" marks warranty where the CORSAIR RM750x and the be quiet! Pure Power 13 M 750W leave the figure out.
| 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
The ASRock Phantom Gaming PG-750G was the lowest-priced pick ($50 to $100) and the CORSAIR RM750x the highest ($100 to $150) when we checked; tiers move with Amazon pricing.
| 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
Why is the Thermaltake Toughpower GT 850W our Best 850W Headroom pick?
The label rests on 850W with Smart Zero Fan. The price of that: the ASRock Phantom Gaming PG-750G, the cheapest pick, still beats it on warranty (10 years against 5 years). It is aimed at high-power CPUs.
Do the CORSAIR RM750x and the ASRock Phantom Gaming PG-750G differ on cybenetics rating?
The CORSAIR RM750x uses Gold; the ASRock Phantom Gaming PG-750G, the be quiet! Pure Power 13 M 750W and the ASRock Steel Legend SL-850GW White use platinum. The MSI MAG A750GL PCIE5 and the Thermaltake Toughpower GT 850W have no cybenetics rating listed, so 4 of 6 picks are covered here.
Will the ASRock Steel Legend SL-850GW White work with my setup?
The ASRock Steel Legend SL-850GW White comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. In this guide it ranks fifth of 6, as our Best White Pick, and first of 6 on rated output (850W).
What extras do the CORSAIR RM750x and the ASRock Phantom Gaming PG-750G include?
The CORSAIR RM750x: embossed cables with low-profile combs. The ASRock Phantom Gaming PG-750G: a 90-degree 12V-2x6 cable with a temperature sensor. The be quiet! Pure Power 13 M 750W: four PCIe 6+2 connectors plus a native 12V-2x6.
Who should choose the CORSAIR RM750x?
The CORSAIR RM750x carries our Best Match for an RTX 4080 label for 750W, fully modular, with a native 12V-2x6 and Cybenetics Gold. It ranks first of 6 here and sat in the $100 to $150 tier at our last price check; it suits most RTX 4080 builds.
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.
Related Guides
- Related guideThe Best 750W Power Supplies for Upper Mid-Range Gaming PCs
- Related guideThe Best 850W Power Supplies for a Single-GPU Gaming PC
- Related guideThe Best PC Cases for the RTX 4080 and 4080 Super
- Lower budgetThe Best Power Supplies Under $75
- Similar guideThe Best Power Supplies for the RTX 4080 Super
- ExplainerHow to choose a power supply for a PC build
- Explainer80 Plus Ratings Explained
- Check compatibility: graphics cardsWill This GPU Fit My Case and PSU? A Pre-Purchase Checklist
- Similar guideThe Best Power Supplies for the RTX 4060 and 4060 Ti
- Topic hubAll power supplies guides
About the author
PC Hardware Editor
Alex covers PC hardware, monitors, components, upgrades and peripherals for The PC Journal, with a focus on helping readers understand specifications, compatibility and meaningful product trade-offs.
Covers: Monitors, Graphics cards, Processors, PC components, Peripherals, Upgrades and compatibility
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