Buying Guide
The Best Power Supplies for the RTX 4070 Ti Super
Six 750W and 850W units with native 12V-2x6 cables for the RTX 4070 Ti Super, compared on warranty, depth and price.
By The PC Journal editorial team
12 min read6 products evaluated
NVIDIA recommends a 700W power supply for the RTX 4070 Ti Super, which uses a 16-pin 12V-2x6 connector. A 750W unit covers most builds, and 850W adds room for 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
Our 6 recommendations at a glance. Tap a pick for the full verdict.
Best Match for a 4070 Ti Super
ASRock Phantom Gaming PG-750G
750W with a 90-degree 12V-2x6 cable and a 10-year warranty.
Best for: Most RTX 4070 Ti Super builds.
Our take Check price for ASRock Phantom Gaming PG-750G (opens in a new tab)
Best Corsair Pick
CORSAIR RM750x (ATX 3.1)
A fully modular ATX 3.1 unit with Cybenetics Gold.
Best for: Corsair builds.
Our take Check price for CORSAIR RM750x (ATX 3.1) (opens in a new tab)
Best Budget 750W
darkFlash DG750
750W in a 140mm body with a native 12V-2x6 cable.
Best for: Keeping cost down.
Our take Check price for darkFlash DG750 (opens in a new tab)
Best Quiet 850W
Thermaltake Toughpower GT 850W
850W with a Smart Zero Fan mode.
Best for: Quiet builds with headroom.
Our take Check price for Thermaltake Toughpower GT 850W (opens in a new tab)
Best Compact 850W
darkFlash DG850
850W in a 140mm body.
Best for: Short PSU bays.
Our take Check price for darkFlash DG850 (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)
Our Picks
Best Match for a 4070 Ti Super1 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
- Most RTX 4070 Ti Super builds.
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 CORSAIR RM750x and the darkFlash DG750 on rated output (750W). On warranty it ties with the ASRock Steel Legend SL-850GW White at 10 years. It shares a platinum cybenetics rating with the ASRock Steel Legend SL-850GW White; the CORSAIR RM750x goes with a gold cybenetics rating.
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 darkFlash DG850 and below the Thermaltake Toughpower GT 850W at the time of writing.
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
Best Corsair Pick2 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
- Pass if a published warranty matters; this one has none.
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. It matches the ASRock Phantom Gaming PG-750G and the darkFlash DG750 on rated output (750W). You get a gold cybenetics rating here, which sets it apart from the ASRock Steel Legend SL-850GW White and its 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. Only the ASRock Steel Legend SL-850GW White came close to it on price at the time of writing; it cost the most of the 6 picks. There is no published warranty figure, whereas the ASRock Phantom Gaming PG-750G offers 10 years.
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
- No published warranty
- No published depth
- Costs more than the darkFlash DG750 at the time of writing
Best Budget 750W3 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
- 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, 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 ASRock Phantom Gaming PG-750G and the CORSAIR RM750x at 750W. It matches the Thermaltake Toughpower GT 850W and the darkFlash DG850 on warranty (5 years). On depth it ties with the darkFlash DG850 at 140mm.
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 darkFlash DG850 was the next step up. If rated output is your priority, the Thermaltake Toughpower GT 850W (850W) is the stronger choice.
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 trails the Thermaltake Toughpower GT 850W (850W)
Best Quiet 850W4 of 6
Thermaltake Toughpower GT 850W on Amazon (opens in a new tab)
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
- Quiet builds with headroom.
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. On rated output it ties with the darkFlash DG850 and the ASRock Steel Legend SL-850GW White at 850W.
It matches the darkFlash DG750 and the darkFlash DG850 on warranty (5 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.
Its price falls between the ASRock Phantom Gaming PG-750G and the ASRock Steel Legend SL-850GW White, based on our last check. Buyers who need a confirmed depth should compare it with the darkFlash DG750, which comes in at 140mm.
Key dimensions & 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
- No published depth
- Costs more than the darkFlash DG750 at the time of writing
Best Compact 850W5 of 6
darkFlash DG850 on Amazon (opens in a new tab)
darkFlash's DG850 fits 850W into a 140mm body, with a native 12V-2x6 cable and fully modular cables.
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, and it carries a 5-year limited warranty with built-in protections. Its 850W output suits high-end CPU and GPU builds.
On rated output it ties with the Thermaltake Toughpower GT 850W and the ASRock Steel Legend SL-850GW White at 850W. It matches the darkFlash DG750 and the Thermaltake Toughpower GT 850W on warranty (5 years). On depth it ties with the darkFlash DG750 at 140mm.
It also comes with multi-protection circuitry. The darkFlash DG850 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.
Its price falls between the darkFlash DG750 and the ASRock Phantom Gaming PG-750G, based on our last check. If warranty is your priority, the ASRock Phantom Gaming PG-750G (10 years) is the stronger choice.
Key dimensions & 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 trails the ASRock Phantom Gaming PG-750G (10 years)
- 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
- Skip it if depth matters most to you; the darkFlash DG750 offers 140mm.
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. On rated output it ties with the Thermaltake Toughpower GT 850W and the darkFlash DG850 at 850W.
It matches the ASRock Phantom Gaming PG-750G on warranty (10 years). On depth it ties with the ASRock Phantom Gaming PG-750G at 150mm. Like the ASRock Phantom Gaming PG-750G, it has a platinum cybenetics rating, while the CORSAIR RM750x uses a gold cybenetics rating.
A white colour is unique to it among these picks, while the darkFlash DG750 uses 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. Its price falls between the Thermaltake Toughpower GT 850W and the CORSAIR RM750x, based on our last check. If native 12V-2x6 cable count is your priority, the ASRock Phantom Gaming PG-750G (1) is the stronger choice.
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
- Depth trails the darkFlash DG750 (140mm)
- 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.
- Price
- We grouped picks by price at the time of writing.
- 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.
What to Look for in a PSUs for RTX 4070 Ti 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.
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.
How to Choose a PSUs for RTX 4070 Ti Super
By priority
| Priority | Consider | Why |
|---|---|---|
| Most RTX 4070 Ti Super builds | ASRock Phantom Gaming PG-750G | 750W with a 90-degree 12V-2x6 cable and a 10-year warranty |
| Corsair builds | CORSAIR RM750x | A fully modular ATX 3.1 unit with Cybenetics Gold |
| Keeping cost down | darkFlash DG750 | 750W in a 140mm body with a native 12V-2x6 cable |
| Quiet builds with headroom | Thermaltake Toughpower GT 850W | 850W with a Smart Zero Fan mode |
| Short PSU bays | darkFlash DG850 | 850W in a 140mm body |
| 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 | Warranty | Depth |
|---|---|---|---|---|
| ASRock Phantom Gaming PG-750G | 750W | 1 | 10 years | 150mm |
| CORSAIR RM750x | 750W | 1 | Not listed | Not listed |
| darkFlash DG750 | 750W | 1 | 5 years | 140mm |
| Thermaltake Toughpower GT 850W | 850W | 1 | 5 years | Not listed |
| darkFlash DG850 | 850W | 1 | 5 years | 140mm |
| ASRock Steel Legend SL-850GW White | 850W | 1 | 10 years | 150mm |
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, darkFlash DG850, ASRock Phantom Gaming PG-750G, Thermaltake Toughpower GT 850W, ASRock Steel Legend SL-850GW White |
| 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.
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
ASRock's PG-750G is the best-matched unit for an RTX 4070 Ti Super here. Corsair's RM750x is the fully modular alternative, darkFlash's DG750 is the budget pick, and the 850W units add headroom.