Buying Guide
The Best Power Supplies for the RTX 4080 Super
Six 750W and 850W units with native 12V-2x6 cables for the RTX 4080 Super, weighted toward 850W for builds with a high-power CPU.
By Alex Morgan, PC Hardware Editor
12 min read6 products evaluated
NVIDIA recommends a 750W power supply for the RTX 4080 Super, which uses a single 16-pin connector. This guide leans toward 850W because many 4080 Super builds pair it with a high-power CPU.
We compared wattage, connectors and ratings from the power supply listings against NVIDIA'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.
Most Efficient 850W
be quiet! Power Zone 2 850WPlatinum ratings from both 80 Plus and Cybenetics.
Best for: Quiet, efficient builds.
Check price for be quiet! Power Zone 2 850W on Amazon (opens in a new tab)
Shortest 850W
Super Flower Leadex VIII Platinum PRO 850WA 125mm depth, the shortest here.
Best for: Cases with a cramped PSU bay.
Check price for Super Flower Leadex VIII Platinum PRO 850W 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 Budget 850W
darkFlash DG850850W with a native 12V-2x6 cable in a 140mm body.
Best for: Keeping cost down.
Check price for darkFlash DG850 on Amazon (opens in a new tab)
Best for Power Spikes
Rosewill VMG 850WSupport for large GPU power spikes on an 850W Gold unit.
Best for: High-power CPU and GPU pairs.
Check price for Rosewill VMG 850W on Amazon (opens in a new tab)
Best 750W Option
be quiet! Pure Power 13 M 750W750W with Cybenetics Platinum and four PCIe 8-pin connectors.
Best for: Builds with a 65W or 120W CPU.
Check price for be quiet! Pure Power 13 M 750W on Amazon (opens in a new tab)
Our Picks
Most Efficient 850W1 of 6
be quiet! Power Zone 2 850W
be quiet!'s Power Zone 2 850W carries Platinum ratings from both 80 Plus and Cybenetics, three PCIe 8-pin connectors and a native 12V-2x6.
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
Its 140mm fan stops at low load. On rated output it ties with the Super Flower Leadex VIII Platinum PRO 850W, the ASRock Steel Legend SL-850GW White, the darkFlash DG850 and the Rosewill VMG 850W at 850W. You get a platinum 80 plus rating here, which sets it apart from the be quiet! Pure Power 13 M 750W and its a gold 80 plus rating.
No depth is rated for the be quiet! Power Zone 2 850W, 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 Super Flower Leadex VIII Platinum PRO 850W, at the time of writing.
Key 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
- No published depth
- Costs more than the darkFlash DG850 at the time of writing
The catch
The maker doesn't give its warranty; if that figure matters, the ASRock Steel Legend SL-850GW White offers 10 years.
Shortest 850W2 of 6
Super Flower Leadex VIII Platinum PRO 850W
Super Flower's Leadex VIII Platinum PRO 850W is 125mm deep, which Super Flower calls the smallest 850W Platinum ATX unit.
Best for
- Cases with a cramped PSU bay.
Skip if
- Skip it if you need to know its warranty before buying; the maker doesn't publish one.
Why we like it
It has a native 12V-2x6 cable and braided ribbon cables. It matches the be quiet! Power Zone 2 850W, the ASRock Steel Legend SL-850GW White, the darkFlash DG850 and the Rosewill VMG 850W on rated output (850W). Its 125mm depth is the shallowest here; the darkFlash DG850 comes next at 140mm.
The Super Flower Leadex VIII Platinum PRO 850W comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. At 125mm deep, compare it with your case's PSU clearance before buying. At our last price check it topped the group, with the be quiet! Power Zone 2 850W the nearest cheaper option. If you want a confirmed 8-pin PCIe connector count, look to the be quiet! Pure Power 13 M 750W instead: it offers 4, while this one gives no figure.
Key specs
- Wattage
- 850W
- Native 12V-2x6 cables
- 1
- Depth
- 125mm
- Cybenetics rating
- Platinum
- ATX version
- ATX 3.1
- Form factor
- ATX
- Cabling
- Fully modular
- Fan
- 120mm
- Colour
- Black
Pros
- A 850W rating
- A native 12V-2x6 cable for 16-pin cards
- A short 125mm body
- ATX 3.1 compliance
Cons
- No published warranty
- Costs more than the darkFlash DG850 at the time of writing
Best White Pick3 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
- Skip it if depth matters most to you; the Super Flower Leadex VIII Platinum PRO 850W offers 125mm.
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 be quiet! Power Zone 2 850W, the Super Flower Leadex VIII Platinum PRO 850W, the darkFlash DG850 and the Rosewill VMG 850W on rated output (850W).
On warranty it leads this guide at 10 years, ahead of the darkFlash DG850 (5 years). Its 150mm depth is the deepest in this group; the Super Flower Leadex VIII Platinum PRO 850W leads at 125mm. No other pick in this guide offers a white colour; compare the be quiet! Pure Power 13 M 750W, which has a black colour.
The ASRock Steel Legend SL-850GW White comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. It was priced above the Rosewill VMG 850W and below the be quiet! Pure Power 13 M 750W at the time of writing.
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
- Depth trails the Super Flower Leadex VIII Platinum PRO 850W (125mm)
- Costs more than the darkFlash DG850 at the time of writing
The catch
There is no published 8-pin PCIe connector count figure, whereas the be quiet! Pure Power 13 M 750W offers 4.
Best Budget 850W4 of 6
darkFlash DG850
darkFlash's DG850 fits 850W into a 140mm body, with a native 12V-2x6 cable and fully modular cables.
Best for
- Keeping cost down.
Skip if
- Look at the others if this bothers you: a shorter 5-year warranty.
Why we like it
Its warranty is 5 years. It is fully modular with a quiet HDB fan, and it carries a 5-year limited warranty with built-in protections. Its 850W output suits high-end CPU and GPU builds.
It matches the be quiet! Power Zone 2 850W, the Super Flower Leadex VIII Platinum PRO 850W, the ASRock Steel Legend SL-850GW White and the Rosewill VMG 850W on rated output (850W). On warranty it ties with the Rosewill VMG 850W at 5 years. Its 140mm depth ranks second of 3 here, behind the Super Flower Leadex VIII Platinum PRO 850W (125mm) and ahead of the ASRock Steel Legend SL-850GW White (150mm).
You also get multi-protection circuitry. The darkFlash DG850 comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. It cost the least of the 6 picks at the time of writing, with the Rosewill VMG 850W the next step up.
Key specs
- Wattage
- 850W
- Native 12V-2x6 cables
- 1
- Warranty
- 5 years
- Depth
- 140mm
- 80 Plus rating
- Gold
- ATX version
- ATX 3.1
- Form factor
- ATX
- Cabling
- Fully modular
- Colour
- Black
Pros
- A 850W rating
- A native 12V-2x6 cable for 16-pin cards
- A short 140mm body
- ATX 3.1 compliance
Cons
- A shorter 5-year warranty
- Warranty of 5 years, behind the ASRock Steel Legend SL-850GW White (10 years)
The catch
There is no published 8-pin PCIe connector count figure, whereas the be quiet! Pure Power 13 M 750W offers 4.
Best for Power Spikes5 of 6
Rosewill VMG 850W
Rosewill's VMG 850W offers a native 12V-2x6 cable and support for large GPU power spikes, on a fully modular 80 Plus Gold design.
Best for
- High-power CPU and GPU pairs.
Skip if
- Pass on it if a shorter 5-year warranty rules it out for your setup.
Why we like it
Its compact 140mm-deep chassis is 35% smaller than a standard ATX unit, which helps in small cases. Six protections guard against overcurrent, overpower, overtemperature, overvoltage, short circuit and undervoltage. Its steel shell has large vents, and a 120mm FDB fan handles cooling.
It lists ATX 3.0 and 3.1 support, a 12V-2x6 cable and a 120mm FDB fan. It matches the be quiet! Power Zone 2 850W, the Super Flower Leadex VIII Platinum PRO 850W, the ASRock Steel Legend SL-850GW White and the darkFlash DG850 on rated output (850W). On warranty it ties with the darkFlash DG850 at 5 years.
The Rosewill VMG 850W comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the Rosewill VMG 850W, so check the maker's page against your case's PSU bay. It was priced above the darkFlash DG850 and below the ASRock Steel Legend SL-850GW White at the time of writing.
Key specs
- Wattage
- 850W
- Native 12V-2x6 cables
- 1
- Warranty
- 5 years
- 80 Plus rating
- Gold
- Form factor
- ATX
- Cabling
- Fully modular
- Fan
- 120mm
- Colour
- Black
Pros
- A 850W rating
- A native 12V-2x6 cable for 16-pin cards
- Fully modular cables
- Listed support for large GPU power excursions
Cons
- A shorter 5-year warranty
- Warranty trails the ASRock Steel Legend SL-850GW White (10 years)
- No published depth
The catch
There is no published 8-pin PCIe connector count figure, whereas the be quiet! Pure Power 13 M 750W offers 4.
Best 750W Option6 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
- Builds with a 65W or 120W CPU.
Skip if
- Skip it if rated output matters most to you; the be quiet! Power Zone 2 850W offers 850W.
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 trails the group at 750W, while the be quiet! Power Zone 2 850W offers 850W.
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. Its price falls between the ASRock Steel Legend SL-850GW White and the be quiet! Power Zone 2 850W, based on our last check.
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
- Rated output trails the be quiet! Power Zone 2 850W (850W)
- No published warranty
- No published depth
The catch
If rated output is your priority, the be quiet! Power Zone 2 850W (850W) is the stronger choice.
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.
- What we compared
- We compared six power supplies on rated output, native 12V-2x6 cable count, 8-pin PCIe connector count and warranty from manufacturer specifications. Nothing was tested in-house; 4 of the 13 fields compared are stated for every pick, while 8-pin PCIe connector count and warranty have gaps.
- What every pick has in common
- All 6, from the be quiet! Power Zone 2 850W to the be quiet! Pure Power 13 M 750W, state rated output, native 12V-2x6 cable count and form factor.
- Where the specs have gaps
- The Super Flower Leadex VIII Platinum PRO 850W, the ASRock Steel Legend SL-850GW White, the darkFlash DG850 and the Rosewill VMG 850W give no 8-pin PCIe connector count; the be quiet! Power Zone 2 850W, the Super Flower Leadex VIII Platinum PRO 850W and the be quiet! Pure Power 13 M 750W give no warranty.
- Price range
- At our last check the picks ran from the darkFlash DG850 ($50 to $100) to the Super Flower Leadex VIII Platinum PRO 850W ($100 to $150).
What to Look for in a PSUs for RTX 4080 Super
Key buying criteria so you get the right fit the first time.
Rated output
Here rated output runs from 750W on the be quiet! Pure Power 13 M 750W to 850W on the be quiet! Power Zone 2 850W, a 13% spread. Start with the be quiet! Power Zone 2 850W if rated output decides it.
Warranty across these picks
Across these 3 picks warranty spans 5 years (the Rosewill VMG 850W) to 10 years (the ASRock Steel Legend SL-850GW White). If warranty is your first filter, the ASRock Steel Legend SL-850GW White sets the ceiling at 10 years. The be quiet! Power Zone 2 850W, the Super Flower Leadex VIII Platinum PRO 850W and the be quiet! Pure Power 13 M 750W give no warranty figure, so 3 of 6 picks are compared here.
Power cables routed to a graphics card inside a PC Depth across these picks
The Super Flower Leadex VIII Platinum PRO 850W tops depth at 125mm and the ASRock Steel Legend SL-850GW White sits lowest at 150mm. The darkFlash DG850 comes second at 140mm, in the $50 to $100 tier against $100 to $150 for the Super Flower Leadex VIII Platinum PRO 850W. The be quiet! Power Zone 2 850W, the Rosewill VMG 850W and the be quiet! Pure Power 13 M 750W give no depth figure, so 3 of 6 picks are compared here.
What to check at home
The be quiet! Power Zone 2 850W comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter.
A PSU-side 8-pin cable connector held between two fingers Extras that separate them
The darkFlash DG850: multi-protection circuitry. The Rosewill VMG 850W: a compact build Rosewill markets for smaller cases. The be quiet! Pure Power 13 M 750W: a fan that switches off completely at low load.
How to Choose a PSUs for RTX 4080 Super
By priority
| Priority | Consider | Why |
|---|---|---|
| Quiet, efficient builds | be quiet! Power Zone 2 850W | Platinum ratings from both 80 Plus and Cybenetics |
| Cases with a cramped PSU bay | Super Flower Leadex VIII Platinum PRO 850W | A 125mm depth, the shortest here |
| White builds | ASRock Steel Legend SL-850GW White | A white 850W unit with a 10-year warranty |
| Keeping cost down | darkFlash DG850 | 850W with a native 12V-2x6 cable in a 140mm body |
| High-power CPU and GPU pairs | Rosewill VMG 850W | Support for large GPU power spikes on an 850W Gold unit |
| Builds with a 65W or 120W CPU | be quiet! Pure Power 13 M 750W | 750W with Cybenetics Platinum and four PCIe 8-pin connectors |
Scroll sideways to see every column.
Key specs side by side
The be quiet! Power Zone 2 850W leads on rated output at 850W, ahead of the Super Flower Leadex VIII Platinum PRO 850W at 850W. "Not listed" marks 8-pin PCIe connector count where the Super Flower Leadex VIII Platinum PRO 850W, the ASRock Steel Legend SL-850GW White, the darkFlash DG850 and the Rosewill VMG 850W leave the figure out.
| Power supplie | Wattage | Native 12V-2x6 cables | PCIe 8-pin connectors | Warranty |
|---|---|---|---|---|
| be quiet! Power Zone 2 850W | 850W | 1 | 3 | Not listed |
| Super Flower Leadex VIII Platinum PRO 850W | 850W | 1 | Not listed | Not listed |
| ASRock Steel Legend SL-850GW White | 850W | 1 | Not listed | 10 years |
| darkFlash DG850 | 850W | 1 | Not listed | 5 years |
| Rosewill VMG 850W | 850W | 1 | Not listed | 5 years |
| be quiet! Pure Power 13 M 750W | 750W | 1 | 4 | Not listed |
Scroll sideways to see every column.
By price at the time of writing
The darkFlash DG850 was the lowest-priced pick ($50 to $100) and the Super Flower Leadex VIII Platinum PRO 850W the highest ($100 to $150) when we checked; tiers move with Amazon pricing.
| Price tier | Power supplies |
|---|---|
| About $50 to $100 | darkFlash DG850, Rosewill VMG 850W, ASRock Steel Legend SL-850GW White, be quiet! Pure Power 13 M 750W |
| About $100 to $150 | be quiet! Power Zone 2 850W, Super Flower Leadex VIII Platinum PRO 850W |
Frequently Asked Questions
How does the darkFlash DG850 compare with the ASRock Steel Legend SL-850GW White on warranty?
The ASRock Steel Legend SL-850GW White leads at 10 years, with the darkFlash DG850 at 5 years. The be quiet! Power Zone 2 850W, the Super Flower Leadex VIII Platinum PRO 850W and the be quiet! Pure Power 13 M 750W don't state a warranty figure, so they sit outside this comparison; 3 of 6 picks are ranked.
Which has the shallowest depth: the Super Flower Leadex VIII Platinum PRO 850W or the darkFlash DG850?
Between the top two, it is 125mm on the Super Flower Leadex VIII Platinum PRO 850W against 140mm on the darkFlash DG850, an 11% difference. The ASRock Steel Legend SL-850GW White is at the other end of this group with 150mm. The be quiet! Power Zone 2 850W, the Rosewill VMG 850W and the be quiet! Pure Power 13 M 750W are left out of this ranking because their depth isn't stated; 3 of 6 picks are ranked.
Is the be quiet! Pure Power 13 M 750W ahead of the be quiet! Power Zone 2 850W on 8-pin PCIe connector count?
The be quiet! Pure Power 13 M 750W tops 8-pin PCIe connector count at 4; the be quiet! Power Zone 2 850W follows at 3, 33% apart. No 8-pin PCIe connector count figure is published for the Super Flower Leadex VIII Platinum PRO 850W, the ASRock Steel Legend SL-850GW White, the darkFlash DG850 and the Rosewill VMG 850W, which leaves 2 of 6 picks ranked here.
What does the Super Flower Leadex VIII Platinum PRO 850W add over the darkFlash DG850?
What it brings is depth (125mm against 140mm). On our last price check the darkFlash DG850 was in the $50 to $100 tier and the Super Flower Leadex VIII Platinum PRO 850W in the $100 to $150 tier, with 4 other picks between them; pay the difference only if depth decides your purchase.
Why is the be quiet! Pure Power 13 M 750W our Best 750W Option pick?
It earns the label for 750W with Cybenetics Platinum and four PCIe 8-pin connectors. The price of that: the darkFlash DG850, the cheapest pick, still beats it on rated output (850W against 750W). It is aimed at builds with a 65W or 120W CPU.
Do the be quiet! Power Zone 2 850W and the ASRock Steel Legend SL-850GW White differ on 80 Plus rating?
The be quiet! Power Zone 2 850W uses platinum; the ASRock Steel Legend SL-850GW White, the darkFlash DG850, the Rosewill VMG 850W and the be quiet! Pure Power 13 M 750W use Gold. The Super Flower Leadex VIII Platinum PRO 850W has no 80 Plus rating listed, so 5 of 6 picks are covered here.
Bottom Line
be quiet!'s Power Zone 2 850W is the efficient choice for an RTX 4080 Super. Super Flower's Leadex VIII suits shallow PSU bays, ASRock's SL-850GW suits white builds, and darkFlash's DG850 keeps cost down.
Related Guides
- Related guideThe Best Power Supplies for the RTX 4080 and 4080 Super
- Related guideThe Best 850W Power Supplies for a Single-GPU Gaming PC
- Related guideThe Best RTX 4080 Super Graphics Cards
- Lower budgetThe Best Power Supplies Under $75
- Similar guideThe Best Power Supplies for the RTX 4070 Super
- ExplainerHow to choose a power supply for a PC build
- Explainer80 Plus Ratings Explained
- Check compatibility: graphics cardsGPU Power Connectors Explained
- Similar guideThe Best Power Supplies for the RTX 4070 Ti Super
- 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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