Buying Guide
The Best Power Supplies for the RX 7800 XT
Six 750W and 850W units for the RX 7800 XT, which AMD pairs with 700W, compared on connectors and price.
By Alex Morgan, PC Hardware Editor
12 min read6 products evaluated
AMD recommends a 700W power supply for the RX 7800 XT, and most partner cards use two PCIe 8-pin plugs. Some ASRock listings suggest 750W, so a 750W unit covers both.
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 RX 7800 XT
SAMA GT750750W with Japanese capacitors at a low price.
Best for: Most RX 7800 XT builds.
Check price for SAMA GT750 on Amazon (opens in a new tab)
Best be quiet! Value
be quiet! Pure Power 12 750WThree PCIe 8-pin connectors.
Best for: Quiet builds.
Check price for be quiet! Pure Power 12 750W on Amazon (opens in a new tab)
Best Compact Pick
darkFlash DG750A 140mm-deep 750W unit.
Best for: Short PSU bays.
Check price for darkFlash DG750 on Amazon (opens in a new tab)
Most Efficient
be quiet! Pure Power 13 M 750WA Cybenetics Platinum rating.
Best for: Long gaming sessions.
Check price for be quiet! Pure Power 13 M 750W on Amazon (opens in a new tab)
Best Corsair Pick
CORSAIR RM750x (ATX 3.1)A fully modular unit with Cybenetics Gold.
Best for: Corsair builds.
Check price for CORSAIR RM750x (ATX 3.1) 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)
Our Picks
Best Match for an RX 7800 XT1 of 6
SAMA GT750
SAMA's GT750 uses Japanese capacitors with an LLC and DC-DC design, a native 12V-2x6 cable and an ECO silent mode for low loads.
Best for
- Most RX 7800 XT builds.
Skip if
- Skip it if price comes first: the darkFlash DG750 cost less when we checked.
Why we like it
Its ECO silent mode keeps the 120mm FDB fan quiet at low load, and Japanese capacitors with LLC and DC-DC topology support long-term stability. Embossed modular cables are easier to route. Its embossed modular cables improve airflow and make routing simpler.
It matches the be quiet! Pure Power 12 750W, the darkFlash DG750, the be quiet! Pure Power 13 M 750W and the CORSAIR RM750x on rated output (750W). It shares a gold cybenetics rating with the CORSAIR RM750x; the ASRock Steel Legend SL-850GW White goes with a platinum cybenetics rating. The SAMA GT750 comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the SAMA GT750, so check the maker's page against your case's PSU bay.
Key specs
- Wattage
- 750W
- Native 12V-2x6 cables
- 1
- Cybenetics rating
- Gold
- ATX version
- ATX 3.1
- Form factor
- ATX
- Cabling
- Fully modular
- Fan
- 120mm
- Fan stop
- Yes
- Colour
- Black
Pros
- A 750W rating
- A native 12V-2x6 cable for 16-pin cards
- ATX 3.1 compliance
- Fully modular cables
Cons
- Costs more than the darkFlash DG750 at the time of writing
The catch
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.
Best be quiet! Value2 of 6
be quiet! Pure Power 12 750W
be quiet!'s Pure Power 12 750W pairs a native 12V-2x6 with three PCIe 8-pin connectors, cooled by a temperature-controlled 120mm fan.
Best for
- Quiet builds.
Skip if
- Price-first buyers should look at the darkFlash DG750, which cost less when we checked.
Why we like it
Its airflow-optimised fan blades reduce turbulence, which helps keep it quiet under a gaming load. It suits a mid-range build that still uses an 8-pin graphics card, and be quiet! designs it to handle short power excursions from the GPU. It matches the SAMA GT750, the darkFlash DG750, the be quiet! Pure Power 13 M 750W and the CORSAIR RM750x on rated output (750W).
No depth is rated for the be quiet! Pure Power 12 750W, so check the maker's page against your case's PSU bay. When we checked, only the SAMA GT750 and cheaper picks cost less, and the ASRock Steel Legend SL-850GW White cost more.
Key specs
- Wattage
- 750W
- Native 12V-2x6 cables
- 1
- PCIe 8-pin connectors
- 3
- 80 Plus rating
- Gold
- ATX version
- ATX 3.1
- Form factor
- ATX
- Fan
- 120mm
- Colour
- Black
Pros
- A 750W rating
- A native 12V-2x6 cable for 16-pin cards
- ATX 3.1 compliance
- Temperature-controlled 120mm be quiet! fan
Cons
- Costs more than the darkFlash DG750 at the time of writing
The catch
If you want a confirmed warranty, look to the ASRock Steel Legend SL-850GW White instead: it offers 10 years, while this one gives no figure.
Best Compact Pick3 of 6
darkFlash DG750
darkFlash's DG750 is a 140mm-deep 80 Plus Gold unit with a native 12V-2x6 cable and a hydraulic-bearing fan.
Best for
- Short PSU bays.
Skip if
- Pass on it if a shorter 5-year warranty rules it out for your setup.
Why we like it
Its warranty is 5 years. It is fully modular with a quiet HDB fan, 80 Plus Gold rated, and backed by a 5-year limited warranty. Its fully modular cables reduce clutter for first-time builders.
It matches the SAMA GT750, the be quiet! Pure Power 12 750W, the be quiet! Pure Power 13 M 750W and the CORSAIR RM750x on rated output (750W). It also offers a 140mm body that leaves room for cables. The darkFlash DG750 comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter.
At 140mm deep, compare it with your case's PSU clearance before buying. No other pick here cost less at our last price check, and the SAMA GT750 was closest.
Key specs
- Wattage
- 750W
- 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 750W rating
- A native 12V-2x6 cable for 16-pin cards
- A short 140mm body
- ATX 3.1 compliance
Cons
- A shorter 5-year warranty
- Rated output of 750W, behind the ASRock Steel Legend SL-850GW White (850W)
The catch
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.
Most Efficient4 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
- Long gaming sessions.
Skip if
- Skip it if price comes first: the darkFlash DG750 cost less when we checked.
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. Like the ASRock Steel Legend SL-850GW White, it has a platinum cybenetics rating, while the SAMA GT750 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 fifth of 6, between the cheaper ASRock Steel Legend SL-850GW White and the pricier CORSAIR RM750x, 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
- Costs more than the darkFlash DG750 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.
Best Corsair Pick5 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
- Corsair builds.
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 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 SAMA GT750, the be quiet! Pure Power 12 750W, the darkFlash DG750 and the be quiet! Pure Power 13 M 750W at 750W. 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 be quiet! Pure Power 13 M 750W 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
- Rated output trails the ASRock Steel Legend SL-850GW White (850W)
- Costs more than the darkFlash DG750 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 Pick6 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
- If budget leads, the darkFlash DG750 was cheaper at our last price check.
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. Its 850W rated output is the highest here; the SAMA GT750 comes next at 750W.
It shares a platinum cybenetics rating with the 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 darkFlash DG750 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. Native 12V-2x6 cable count is its weakest area, and the SAMA GT750 covers it better at 1.
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 darkFlash DG750 at the time of writing
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 lined up six power supplies on rated output, native 12V-2x6 cable count, 8-pin PCIe connector count and warranty, using each maker's published specs. We did not test them in-house, and 8-pin PCIe connector count and warranty are missing for at least one pick.
- What every pick has in common
- All 6, from the SAMA GT750 to the ASRock Steel Legend SL-850GW White, state rated output, native 12V-2x6 cable count and ATX version and share ATX 3.1 ATX version.
- Where the specs have gaps
- The SAMA GT750, the darkFlash DG750, the CORSAIR RM750x and the ASRock Steel Legend SL-850GW White give no 8-pin PCIe connector count; the SAMA GT750, the be quiet! Pure Power 12 750W, the be quiet! Pure Power 13 M 750W and the CORSAIR RM750x give no warranty.
- Price range
- At our last check the picks ran from the darkFlash DG750 ($50 to $100) to the CORSAIR RM750x ($100 to $150).
What to Look for in a PSUs for RX 7800 XT
Key buying criteria so you get the right fit the first time.
How much rated output you need
Here rated output runs from 750W on the CORSAIR RM750x to 850W on the ASRock Steel Legend SL-850GW White, a 13% spread. If rated output is your first filter, the ASRock Steel Legend SL-850GW White sets the ceiling at 850W.
8-pin PCIe connector count
Across these 2 picks 8-pin PCIe connector count spans 3 (the be quiet! Pure Power 12 750W) to 4 (the be quiet! Pure Power 13 M 750W). The be quiet! Pure Power 13 M 750W is the pick for 8-pin PCIe connector count. The SAMA GT750, the darkFlash DG750, the CORSAIR RM750x and the ASRock Steel Legend SL-850GW White give no 8-pin PCIe connector count figure, so 2 of 6 picks are compared here.
A 24-pin ATX power cable held in a hand Warranty across these picks
Across these 2 picks warranty spans 5 years (the darkFlash DG750) to 10 years (the ASRock Steel Legend SL-850GW White). Start with the ASRock Steel Legend SL-850GW White if warranty decides it. The SAMA GT750, the be quiet! Pure Power 12 750W, the be quiet! Pure Power 13 M 750W and the CORSAIR RM750x give no warranty figure, so 2 of 6 picks are compared here.
What to check at home
The SAMA GT750 comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter.
A 24-pin ATX connector seen from the pin side Extras that separate them
The be quiet! Pure Power 13 M 750W: a fan that switches off completely at low load. The CORSAIR RM750x: a native 12V-2x6 cable with no adapter needed. The ASRock Steel Legend SL-850GW White: a 10-year warranty on a white unit.
How to Choose a PSUs for RX 7800 XT
By priority
| Priority | Consider | Why |
|---|---|---|
| Most RX 7800 XT builds | SAMA GT750 | 750W with Japanese capacitors at a low price |
| Quiet builds | be quiet! Pure Power 12 750W | Three PCIe 8-pin connectors |
| Short PSU bays | darkFlash DG750 | A 140mm-deep 750W unit |
| Long gaming sessions | be quiet! Pure Power 13 M 750W | A Cybenetics Platinum rating |
| Corsair builds | CORSAIR RM750x | A fully modular unit with Cybenetics Gold |
| White builds | ASRock Steel Legend SL-850GW White | A white 850W unit with a 10-year warranty |
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 SAMA GT750 at 750W. "Not listed" marks 8-pin PCIe connector count where the SAMA GT750, the darkFlash DG750, the CORSAIR RM750x and the ASRock Steel Legend SL-850GW White leave the figure out.
| Power supplie | Wattage | Native 12V-2x6 cables | PCIe 8-pin connectors | Warranty |
|---|---|---|---|---|
| SAMA GT750 | 750W | 1 | Not listed | Not listed |
| be quiet! Pure Power 12 750W | 750W | 1 | 3 | Not listed |
| darkFlash DG750 | 750W | 1 | Not listed | 5 years |
| be quiet! Pure Power 13 M 750W | 750W | 1 | 4 | Not listed |
| CORSAIR RM750x | 750W | 1 | Not listed | Not listed |
| ASRock Steel Legend SL-850GW White | 850W | 1 | Not listed | 10 years |
Scroll sideways to see every column.
By price at the time of writing
The darkFlash DG750 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 | darkFlash DG750, SAMA GT750, be quiet! Pure Power 12 750W, ASRock Steel Legend SL-850GW White, be quiet! Pure Power 13 M 750W |
| About $100 to $150 | CORSAIR RM750x |
Frequently Asked Questions
Which has the highest rated output: the ASRock Steel Legend SL-850GW White or the SAMA GT750?
Between the top two, it is 850W on the ASRock Steel Legend SL-850GW White against 750W on the SAMA GT750, a 13% difference.
Is the be quiet! Pure Power 13 M 750W ahead of the be quiet! Pure Power 12 750W 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! Pure Power 12 750W follows at 3, 33% apart. The SAMA GT750, the darkFlash DG750, the CORSAIR RM750x and the ASRock Steel Legend SL-850GW White don't state a 8-pin PCIe connector count figure, so they sit outside this comparison; 2 of 6 picks are ranked.
Is the ASRock Steel Legend SL-850GW White ahead of the darkFlash DG750 on warranty?
The ASRock Steel Legend SL-850GW White tops warranty at 10 years; the darkFlash DG750 follows at 5 years, 100% apart. The SAMA GT750, the be quiet! Pure Power 12 750W, the be quiet! Pure Power 13 M 750W and the CORSAIR RM750x don't state a warranty figure, so they sit outside this comparison; 2 of 6 picks are ranked.
Why is the be quiet! Pure Power 13 M 750W our Most Efficient pick?
It earns the label for a Cybenetics Platinum rating. It suits long gaming sessions.
Do the SAMA GT750 and the be quiet! Pure Power 13 M 750W differ on cybenetics rating?
The SAMA GT750 and the CORSAIR RM750x use Gold; the be quiet! Pure Power 13 M 750W and the ASRock Steel Legend SL-850GW White use platinum. The be quiet! Pure Power 12 750W and the darkFlash DG750 have no cybenetics rating listed, so 4 of 6 picks are covered here.
Will the darkFlash DG750 work with my setup?
The darkFlash DG750 comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. In this guide it ranks third of 6, as our Best Compact Pick, and fourth of 6 on rated output (750W).
Bottom Line
SAMA's GT750 is the best-matched budget unit for an RX 7800 XT. be quiet!'s Pure Power 12 offers three 8-pin connectors, and ASRock's SL-850GW suits white builds.
Related Guides
- Related guideThe Best 750W Power Supplies for Upper Mid-Range Gaming PCs
- Related guideThe Best RX 7800 XT Graphics Cards
- Related guideThe Best CPUs for the RX 7800 XT
- Lower budgetThe Best Power Supplies Under $75
- Similar guideThe Best Power Supplies for the RX 7900 XT
- ExplainerHow to choose a power supply for a PC build
- Explainer80 Plus Ratings Explained
- Check compatibility: graphics cardsHow to Choose a Graphics Card for 1080p Gaming
- Similar guideThe Best Power Supplies for RX 9060 XT
- 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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