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 The PC Journal editorial team
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
Our 6 recommendations at a glance. Tap a pick for the full verdict.
Best Match for an RX 7800 XT
SAMA GT750
750W with Japanese capacitors at a low price.
Best for: Most RX 7800 XT builds.
Best be quiet! Value
be quiet! Pure Power 12 750W
Three PCIe 8-pin connectors.
Best for: Quiet builds.
Our take Check price for be quiet! Pure Power 12 750W (opens in a new tab)
Best Compact Pick
darkFlash DG750
A 140mm-deep 750W unit.
Best for: Short PSU bays.
Our take Check price for darkFlash DG750 (opens in a new tab)
Most Efficient
be quiet! Pure Power 13 M 750W
A Cybenetics Platinum rating.
Best for: Long gaming sessions.
Our take Check price for be quiet! Pure Power 13 M 750W (opens in a new tab)
Best Corsair Pick
CORSAIR RM750x (ATX 3.1)
A fully modular unit with Cybenetics Gold.
Best for: Corsair builds.
Our take Check price for CORSAIR RM750x (ATX 3.1) (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)
| Pick | Why it’s here | Best for | Price |
|---|---|---|---|
| 750W with Japanese capacitors at a low price. | Most RX 7800 XT builds. | Check price for SAMA GT750 (opens in a new tab) |
| Three PCIe 8-pin connectors. | Quiet builds. | Check price for be quiet! Pure Power 12 750W (opens in a new tab) |
| A 140mm-deep 750W unit. | Short PSU bays. | Check price for darkFlash DG750 (opens in a new tab) |
| A Cybenetics Platinum rating. | Long gaming sessions. | Check price for be quiet! Pure Power 13 M 750W (opens in a new tab) |
| A fully modular unit with Cybenetics Gold. | Corsair builds. | Check price for CORSAIR RM750x (ATX 3.1) (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) |
Our Picks
Best Match for an RX 7800 XT1 of 6
SAMA GT750 on Amazon (opens in a new tab)
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. 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 dimensions & 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
Best be quiet! Value2 of 6
be quiet! Pure Power 12 750W on Amazon (opens in a new tab)
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. 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.
Key dimensions & 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
Best Compact Pick3 of 6
darkFlash DG750 on Amazon (opens in a new tab)
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 warrant 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. 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 dimensions & 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)
Most Efficient4 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
- 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.
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. The maker doesn't give its warranty; if that figure matters, the ASRock Steel Legend SL-850GW White 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
- Costs more than the darkFlash DG750 at the time of writing
Best Corsair Pick5 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
- 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. The trade-off is rated output; for more, the ASRock Steel Legend SL-850GW White offers 850W.
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
- Rated output trails the ASRock Steel Legend SL-850GW White (850W)
- Costs more than the darkFlash DG750 at the time of writing
Best White Pick6 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
- 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 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 darkFlash DG750 at the time of writing
How We Chose
Each pick was assessed across 4 criteria weighted for real-world use.
- 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.
- Build and warranty
- We checked depth, modular cabling, fan-stop modes and warranty length.
- Standards
- We noted ATX version, 80 Plus and Cybenetics ratings.
What to Look for in a PSUs for RX 7800 XT
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.
Check depth and cabling
Deeper units can clash with drive cages or front radiators. Fully modular cables make routing easier in tight cases.
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.
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.
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.
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
Figures as each maker states them.
| 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
Prices change often; these tiers reflect Amazon prices when this guide was updated.
| 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
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.
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.
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.
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 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.
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.