Buying Guide
The Best Power Supplies for the RTX 4070 Super
Six 650W and 750W units with native 12V-2x6 cables for the RTX 4070 Super, which NVIDIA pairs with 650W.
By The PC Journal editorial team
12 min read6 products evaluated
NVIDIA recommends a 650W power supply for the RTX 4070 Super. Most partner cards use a 16-pin 12V-2x6 connector, so a native cable avoids the adapter in the box.
We compared wattage, connectors and ratings from the power supply listings against NVIDIA'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 4070 Super
MONTECH Century II 650W
650W with a native 12V-2x6 and a 10-year warranty.
Best for: Most RTX 4070 Super builds.
Our take Check price for MONTECH Century II 650W (opens in a new tab)
Best Warranty at 750W
MSI MAG A750GL PCIE5
A 10-year warranty on a fully modular 750W unit.
Best for: Long-term builds.
Our take Check price for MSI MAG A750GL PCIE5 (opens in a new tab)
Best White Pick
SAMA GT650 White
A white fully modular 650W unit.
Best for: White builds.
Our take Check price for SAMA GT650 White (opens in a new tab)
Most Efficient 750W
be quiet! Pure Power 13 M 750W
Cybenetics Platinum with four PCIe 8-pin connectors.
Best for: Quiet builds.
Our take Check price for be quiet! Pure Power 13 M 750W (opens in a new tab)
Best Compact 750W
darkFlash DG750
750W in a 140mm body.
Best for: Short PSU bays.
Our take Check price for darkFlash DG750 (opens in a new tab)
Best Cable Routing
ASRock Phantom Gaming PG-750G
A 90-degree 12V-2x6 cable with a temperature sensor.
Best for: Tight cable runs beside the side panel.
Our take Check price for ASRock Phantom Gaming PG-750G (opens in a new tab)
Our Picks
Best Match for an RTX 4070 Super1 of 6
MONTECH Century II 650W on Amazon (opens in a new tab)
Montech's Century II 650W brings a native 12V-2x6 cable, fully modular cables and a 10-year warranty to a low-cost 80 Plus Gold unit.
Best for
- Most RTX 4070 Super builds.
Skip if
- If budget leads, the darkFlash DG750 was cheaper at our last price check.
Why we like it
Its 135mm FDB fan has a zero RPM mode, and it uses 100% Japanese capacitors. It matches the SAMA GT650 White on rated output (650W). On warranty it ties with the MSI MAG A750GL PCIE5 and the ASRock Phantom Gaming PG-750G at 10 years.
The MONTECH Century II 650W comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the MONTECH Century II 650W, so check the maker's page against your case's PSU bay. When we checked, only the SAMA GT650 White and cheaper picks cost less, and the ASRock Phantom Gaming PG-750G cost more. If you want a confirmed depth, look to the darkFlash DG750 instead: it comes in at 140mm, while this one gives no figure.
Key dimensions & specs
- Wattage: 650W
- Native 12V-2x6 cables: 1
- Warranty: 10 years
- 80 Plus rating: Gold
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan: 135mm
- Fan stop: Yes
- Colour: Black
Pros
- A 650W 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
Best Warranty at 750W2 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
- Long-term builds.
Skip if
- If budget leads, the darkFlash DG750 was cheaper at our last price check.
Why we like it
It is 80 Plus Gold rated and carries a 10-year limited warranty. It matches the be quiet! Pure Power 13 M 750W, the darkFlash DG750 and the ASRock Phantom Gaming PG-750G on rated output (750W). On warranty it ties with the MONTECH Century II 650W and the ASRock Phantom Gaming PG-750G at 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. Only the be quiet! Pure Power 13 M 750W came close to it on price at the time of writing; it cost the most of the 6 picks. There is no published depth figure, whereas the darkFlash DG750 comes in at 140mm.
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
- Costs more than the darkFlash DG750 at the time of writing
Best White Pick3 of 6
SAMA GT650 White on Amazon (opens in a new tab)
SAMA's GT650 White is a fully modular white unit with embossed white cables, a native 12V-2x6 cable and an ECO silent mode.
Best for
- White builds.
Skip if
- Skip it if rated output matters most to you; the MSI MAG A750GL PCIE5 offers 750W.
Why we like it
Japanese capacitors support long-term durability, and a native 12V-2x6 connector feeds current graphics cards. It is 80 Plus Gold rated. It matches the MONTECH Century II 650W on rated output (650W).
No other pick in this guide offers a white colour; compare the MONTECH Century II 650W, which has a black colour. The SAMA GT650 White comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the SAMA GT650 White, so check the maker's page against your case's PSU bay.
It was priced above the darkFlash DG750 and below the MONTECH Century II 650W at the time of writing. It gives ground on rated output, where the MSI MAG A750GL PCIE5 offers 750W.
Key dimensions & specs
- Wattage: 650W
- Native 12V-2x6 cables: 1
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan: 120mm
- Fan stop: Yes
- Colour: White
Pros
- A 650W rating
- A native 12V-2x6 cable for 16-pin cards
- ATX 3.1 compliance
- Fully modular cables
Cons
- Rated output trails the MSI MAG A750GL PCIE5 (750W)
- No published warranty
- Costs more than the darkFlash DG750 at the time of writing
Most Efficient 750W4 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 builds.
Skip if
- Pass if a published warranty matters; this one has none.
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 matches the MSI MAG A750GL PCIE5, the darkFlash DG750 and the ASRock Phantom Gaming PG-750G on rated output (750W). 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. It also brings ATX 3.1 compliance. There is no published warranty figure, whereas the MONTECH Century II 650W 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 darkFlash DG750 at the time of writing
Best Compact 750W5 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
- Worth skipping when a shorter 5-year warrant is a problem.
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.
On rated output it ties with the MSI MAG A750GL PCIE5, the be quiet! Pure Power 13 M 750W and the ASRock Phantom Gaming PG-750G at 750W. Its 5 years warranty is the shortest in this group; the MONTECH Century II 650W leads at 10 years. It also comes with 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. It was the cheapest of the group when we checked; the SAMA GT650 White was the next step up.
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
- Warranty trails the MONTECH Century II 650W (10 years)
Best Cable Routing6 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 beside the side panel.
Skip if
- Price-first buyers should look at the darkFlash DG750, which cost less when we checked.
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.
It matches the MSI MAG A750GL PCIE5, the be quiet! Pure Power 13 M 750W and the darkFlash DG750 on rated output (750W). On warranty it ties with the MONTECH Century II 650W and the MSI MAG A750GL PCIE5 at 10 years. 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 was priced above the MONTECH Century II 650W and below the be quiet! Pure Power 13 M 750W at the time of writing. It gives ground on native 12V-2x6 cable count, where the MONTECH Century II 650W offers 1.
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
- 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.
- 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.
- 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.
What to Look for in a PSUs for RTX 4070 Super
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.
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.
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.
How to Choose a PSUs for RTX 4070 Super
By priority
| Priority | Consider | Why |
|---|---|---|
| Most RTX 4070 Super builds | MONTECH Century II 650W | 650W with a native 12V-2x6 and a 10-year warranty |
| Long-term builds | MSI MAG A750GL PCIE5 | A 10-year warranty on a fully modular 750W unit |
| White builds | SAMA GT650 White | A white fully modular 650W unit |
| Quiet builds | be quiet! Pure Power 13 M 750W | Cybenetics Platinum with four PCIe 8-pin connectors |
| Short PSU bays | darkFlash DG750 | 750W in a 140mm body |
| Tight cable runs beside the side panel | ASRock Phantom Gaming PG-750G | A 90-degree 12V-2x6 cable with a temperature sensor |
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 |
|---|---|---|---|---|
| MONTECH Century II 650W | 650W | 1 | 10 years | Not listed |
| MSI MAG A750GL PCIE5 | 750W | 1 | 10 years | Not listed |
| SAMA GT650 White | 650W | 1 | Not listed | Not listed |
| be quiet! Pure Power 13 M 750W | 750W | 1 | Not listed | Not listed |
| darkFlash DG750 | 750W | 1 | 5 years | 140mm |
| ASRock Phantom Gaming PG-750G | 750W | 1 | 10 years | 150mm |
Scroll sideways to see every column.
Frequently Asked Questions
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 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.
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 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.
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.
Bottom Line
Montech's Century II 650W is the best-matched unit for an RTX 4070 Super, with a 10-year warranty. MSI's A750GL adds headroom with the same warranty length, and SAMA's GT650 White suits white builds.