Buying Guide

The Best PSUs for High-End GPUs

From the Thermaltake Toughpower GT 1000W to the be quiet! Dark Power Pro 14 IO 1600W: five power supplies ranked on rated output and native 12V-2x6 cable count, with who should skip each one.

By , PC Hardware Editor

12 min read5 products evaluated

PC components laid out on a workbench ready for a build
Illustrative image

Flagship GPUs need a native 12V-2x6 cable and headroom for transient spikes. Every pick is 1000W or more with a 12V-2x6 connector, ordered by wattage.

This is a research roundup, not a lab test: wattage, native 12V-2x6 cables and depth come from each maker's published specs; nothing here was tested in-house, and a missing depth is flagged, not filled in.

Quick Picks

Which of the 5 picks to look at first. Tap a name for the full analysis.

  1. Most Native 12V-2x6 Cables

    ASRock Phantom Gaming PG-1600G

    The most native 12V-2x6 cable count here (2).

    Best for: Buyers who put native 12V-2x6 cable count first.

    Check price for ASRock Phantom Gaming PG-1600G on Amazon (opens in a new tab)
  2. Premium Pick

    be quiet! Dark Power Pro 14 IO 1600W

    Monitoring and control through be quiet!'s IO Center software at the highest price in the group.

    Best for: Buyers for whom price is not the deciding factor, since the Thermaltake Toughpower GT 1000W costs less.

    Check price for be quiet! Dark Power Pro 14 IO 1600W on Amazon (opens in a new tab)
  3. Also Consider

    Super Flower Leadex VII XP PRO 1200W

    Listed voltage regulation within ±0.5% on the main rails.

    Best for: Buyers who want listed voltage regulation within ±0.5% on the main rails.

    Check price for Super Flower Leadex VII XP PRO 1200W on Amazon (opens in a new tab)
  4. Strong Alternative

    Seasonic Vertex PX-1200

    Seasonic's hybrid silent fan control.

    Best for: Buyers who want Seasonic's hybrid silent fan control.

    Check price for Seasonic Vertex PX-1200 on Amazon (opens in a new tab)
  5. Lowest Price Here

    Thermaltake Toughpower GT 1000W

    Undercutting the ASRock Phantom Gaming PG-1600G on price when we checked.

    Best for: Spending as little as possible, with the ASRock Phantom Gaming PG-1600G the next step up.

    Check price for Thermaltake Toughpower GT 1000W on Amazon (opens in a new tab)

Our Picks

Most Native 12V-2x6 Cables1 of 5

ASRock Phantom Gaming PG-1600G

ASRock's Phantom Gaming PG-1600G has 1600W, two 12V-2x6 cables with temperature monitoring and eight PCIe 8-pin connectors.

Best for

Buyers who put native 12V-2x6 cable count first.

Skip if

Pass on it if a 180mm depth needs a roomy PSU bay rules it out for your setup.
ASRock Phantom Gaming PG-1600G

Why we like it

At 180mm deep it needs a large case. On rated output it ties with the be quiet! Dark Power Pro 14 IO 1600W at 1600W. Nothing else here matches its 2 native 12V-2x6 cable count; the be quiet! Dark Power Pro 14 IO 1600W comes closest at 1.

It shares a gold 80 plus rating with the Thermaltake Toughpower GT 1000W; the Super Flower Leadex VII XP PRO 1200W goes with a platinum 80 plus rating. Like the Super Flower Leadex VII XP PRO 1200W, it has a platinum cybenetics rating, while the be quiet! Dark Power Pro 14 IO 1600W uses a titanium cybenetics rating. At 180mm deep, compare it with your case's PSU clearance before buying. On price it sat second of 5, between the cheaper Thermaltake Toughpower GT 1000W and the pricier Super Flower Leadex VII XP PRO 1200W, at the time of writing.

Key specs

Wattage
1600W
Native 12V-2x6 cables
2
PCIe 8-pin connectors
8
Warranty
10 years
Depth
180mm
80 Plus rating
Gold
Cybenetics rating
Platinum
ATX version
ATX 3.1
Form factor
ATX
Cabling
Fully modular
Fan
135mm
Colour
Black

Pros

  • 1600W of rated output for high-power cards
  • 2 native 12V-2x6 cables
  • 8 PCIe 8-pin connectors for older cards
  • A 10-year warranty

Cons

  • A 180mm depth needs a roomy PSU bay
  • Costs more than the Thermaltake Toughpower GT 1000W at the time of writing

Premium Pick2 of 5

be quiet! Dark Power Pro 14 IO 1600W

The be quiet!

Best for

Buyers for whom price is not the deciding factor, since the Thermaltake Toughpower GT 1000W costs less.

Skip if

Price-first buyers should look at the Thermaltake Toughpower GT 1000W, which cost less when we checked.
be quiet! Dark Power Pro 14 IO 1600W

Why we like it

Dark Power Pro 14 IO 1600W is built around monitoring and control through be quiet!'s IO Center software, with a switchable active or semi-passive fan mode on top. On the spec sheet, it offers a 1600W rated output and offers a 1 native 12V-2x6 cable count. It switches between multi-rail and single-rail modes, and it is Titanium rated at up to 94.9% efficiency.

A vibration-free Silent Wings fan keeps it quiet. It matches the ASRock Phantom Gaming PG-1600G on rated output (1600W). It matches the Super Flower Leadex VII XP PRO 1200W, the Seasonic Vertex PX-1200 and the Thermaltake Toughpower GT 1000W on native 12V-2x6 cable count (1).

No other pick in this guide offers a titanium 80 plus rating; compare the Seasonic Vertex PX-1200, which has a platinum 80 plus rating. Only the Seasonic Vertex PX-1200 came close to it on price at the time of writing; it cost the most of the 5 picks.

Key specs

Wattage
1600W
Native 12V-2x6 cables
1
80 Plus rating
Titanium
Cybenetics rating
Titanium
ATX version
ATX 3.1
Form factor
ATX
Fan stop
Yes
Colour
Black

Pros

  • 1600W of rated output for high-power cards
  • A native 12V-2x6 cable for 16-pin cards
  • 80 Plus Titanium efficiency
  • ATX 3.1 compliance

Cons

  • Costs more than the Thermaltake Toughpower GT 1000W at the time of writing

The catch

There is no published depth figure, whereas the Thermaltake Toughpower GT 1000W comes in at 140mm.

Also Consider3 of 5

Super Flower Leadex VII XP PRO 1200W

Super Flower's Leadex VII XP PRO 1200W carries Platinum ratings from both 80 Plus and Cybenetics.

Best for

Buyers who want listed voltage regulation within ±0.5% on the main rails.

Skip if

Price-first buyers should look at the Thermaltake Toughpower GT 1000W, which cost less when we checked.
Super Flower Leadex VII XP PRO 1200W

Why we like it

The maker specifies voltage regulation within 0.5% on the main rails and flexible ribbon cables. It is Cybenetics Platinum and 80 Plus Platinum, and all cables are ribbon-style for flexibility. On rated output it ties with the Seasonic Vertex PX-1200 at 1200W.

On native 12V-2x6 cable count it ties with the be quiet! Dark Power Pro 14 IO 1600W, the Seasonic Vertex PX-1200 and the Thermaltake Toughpower GT 1000W at 1. It shares a platinum 80 plus rating with the Seasonic Vertex PX-1200; the be quiet! Dark Power Pro 14 IO 1600W goes with a titanium 80 plus rating. The Super Flower Leadex VII XP PRO 1200W comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the Super Flower Leadex VII XP PRO 1200W, so check the maker's page against your case's PSU bay.

Key specs

Wattage
1200W
Native 12V-2x6 cables
1
80 Plus rating
Platinum
Cybenetics rating
Platinum
Form factor
ATX
Cabling
Fully modular
Colour
Black

Pros

  • 1200W of rated output for high-power cards
  • A native 12V-2x6 cable for 16-pin cards
  • 80 Plus Platinum efficiency
  • Fully modular cables

Cons

  • Costs more than the Thermaltake Toughpower GT 1000W at the time of writing

The catch

Buyers who need a confirmed depth should compare it with the Thermaltake Toughpower GT 1000W, which comes in at 140mm.

Strong Alternative4 of 5

Seasonic Vertex PX-1200

The Seasonic Vertex PX-1200 is built around Seasonic's hybrid silent fan control, with a 135mm FDB fan on top.

Best for

Buyers who want Seasonic's hybrid silent fan control.

Skip if

Price-first buyers should look at the Thermaltake Toughpower GT 1000W, which cost less when we checked.
Seasonic Vertex PX-1200

Why we like it

On the spec sheet, it offers a 1200W rated output and offers a 1 native 12V-2x6 cable count. On rated output it ties with the Super Flower Leadex VII XP PRO 1200W at 1200W. On native 12V-2x6 cable count it ties with the be quiet! Dark Power Pro 14 IO 1600W, the Super Flower Leadex VII XP PRO 1200W and the Thermaltake Toughpower GT 1000W at 1.

It shares a platinum 80 plus rating with the Super Flower Leadex VII XP PRO 1200W; the be quiet! Dark Power Pro 14 IO 1600W goes with a titanium 80 plus rating. The Seasonic Vertex PX-1200 comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the Seasonic Vertex PX-1200, so check the maker's page against your case's PSU bay.

Key specs

Wattage
1200W
Native 12V-2x6 cables
1
80 Plus rating
Platinum
Form factor
ATX
Cabling
Fully modular
Fan
135mm
Fan stop
Yes
Colour
Black

Pros

  • 1200W of rated output for high-power cards
  • A native 12V-2x6 cable for 16-pin cards
  • 80 Plus Platinum efficiency
  • Fully modular cables

Cons

  • Costs more than the Thermaltake Toughpower GT 1000W at the time of writing

The catch

Buyers who need a confirmed depth should compare it with the Thermaltake Toughpower GT 1000W, which comes in at 140mm.

Lowest Price Here5 of 5

Thermaltake Toughpower GT 1000W

Thermaltake's Toughpower GT 1000W is only 140mm deep, short for its wattage, and ships with a native 12V-2x6 cable and flat modular cables.

Best for

Spending as little as possible, with the ASRock Phantom Gaming PG-1600G the next step up.

Skip if

Skip it if rated output matters most to you; the ASRock Phantom Gaming PG-1600G offers 1600W.
Thermaltake Toughpower GT 1000W

Why we like it

Its flat modular cables have colour-matched connectors, and a hydraulic-bearing fan with Smart Zero Fan keeps it quiet. On rated output it trails the group at 1000W, while the ASRock Phantom Gaming PG-1600G offers 1600W. On native 12V-2x6 cable count it ties with the be quiet! Dark Power Pro 14 IO 1600W, the Super Flower Leadex VII XP PRO 1200W and the Seasonic Vertex PX-1200 at 1.

It shares a gold 80 plus rating with the ASRock Phantom Gaming PG-1600G; the Seasonic Vertex PX-1200 goes with a platinum 80 plus rating. The Thermaltake Toughpower GT 1000W 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 ASRock Phantom Gaming PG-1600G was the next step up.

Key specs

Wattage
1000W
Native 12V-2x6 cables
1
Depth
140mm
80 Plus rating
Gold
ATX version
ATX 3.1
Form factor
ATX
Cabling
Fully modular
Fan
120mm
Fan stop
Yes
Colour
Black

Pros

  • 1000W of rated output for high-power cards
  • A native 12V-2x6 cable for 16-pin cards
  • A short 140mm body
  • ATX 3.1 compliance

Cons

  • Rated output trails the ASRock Phantom Gaming PG-1600G (1600W)
  • Native 12V-2x6 cable count trails the ASRock Phantom Gaming PG-1600G (2)

The catch

If rated output is your priority, the ASRock Phantom Gaming PG-1600G (1600W) 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.

Power cables routed to a graphics card inside a PC
Power cables routed to a graphics card inside a PC
The figures behind the order
We set side by side five power supplies on rated output, native 12V-2x6 cable count, depth and 80 Plus rating from manufacturer specifications. We did not test them in-house, and depth and cybenetics rating are missing for at least one pick.
The shared baseline
All 5, from the ASRock Phantom Gaming PG-1600G to the Thermaltake Toughpower GT 1000W, state rated output, native 12V-2x6 cable count and 80 Plus rating and share Black colour.
Where the specs have gaps
The be quiet! Dark Power Pro 14 IO 1600W, the Super Flower Leadex VII XP PRO 1200W and the Seasonic Vertex PX-1200 give no depth; the Seasonic Vertex PX-1200 and the Thermaltake Toughpower GT 1000W give no cybenetics rating.
Price range
At our last check the picks ran from the Thermaltake Toughpower GT 1000W ($50 to $100) to the be quiet! Dark Power Pro 14 IO 1600W ($250 to $500).

What to Look for in a PSUs for High-End GPUs

Key buying criteria so you get the right fit the first time.

  1. Rated output

    The ASRock Phantom Gaming PG-1600G tops rated output at 1600W and the Thermaltake Toughpower GT 1000W sits lowest at 1000W; 2 picks share the top figure. The ASRock Phantom Gaming PG-1600G is the pick for rated output.

  2. How much native 12V-2x6 cable count you need

    Across these 5 picks native 12V-2x6 cable count spans 1 (the Thermaltake Toughpower GT 1000W) to 2 (the ASRock Phantom Gaming PG-1600G). If native 12V-2x6 cable count is your first filter, the ASRock Phantom Gaming PG-1600G sets the ceiling at 2.

    A PSU-side 8-pin cable connector held between two fingers
    A PSU-side 8-pin cable connector held between two fingers
  3. Depth across these picks

    Across these 2 picks depth spans 180mm (the ASRock Phantom Gaming PG-1600G) to 140mm (the Thermaltake Toughpower GT 1000W). Start with the Thermaltake Toughpower GT 1000W if depth decides it. The be quiet! Dark Power Pro 14 IO 1600W, the Super Flower Leadex VII XP PRO 1200W and the Seasonic Vertex PX-1200 give no depth figure, so 2 of 5 picks are compared here.

  4. Cybenetics rating

    The ASRock Phantom Gaming PG-1600G and the Super Flower Leadex VII XP PRO 1200W list platinum; the be quiet! Dark Power Pro 14 IO 1600W lists titanium.

    A 24-pin ATX power cable held in a hand
    A 24-pin ATX power cable held in a hand
  5. Setup checks

    The ASRock Phantom Gaming PG-1600G comes with 2 native 12V-2x6 cables, so a 16-pin card plugs in without an adapter.

How to Choose a PSUs for High-End GPUs

By priority

PriorityConsiderWhy
Buyers who put native 12V-2x6 cable count firstASRock Phantom Gaming PG-1600GThe most native 12V-2x6 cable count here (2)
Buyers for whom price is not the deciding factor, since the Thermaltake Toughpower GT 1000W costs lessbe quiet! Dark Power Pro 14 IO 1600WMonitoring and control through be quiet!'s IO Center software at the highest price in the group
Buyers who want listed voltage regulation within ±0.5% on the main railsSuper Flower Leadex VII XP PRO 1200WListed voltage regulation within ±0.5% on the main rails
Buyers who want Seasonic's hybrid silent fan controlSeasonic Vertex PX-1200Seasonic's hybrid silent fan control
Spending as little as possible, with the ASRock Phantom Gaming PG-1600G the next step upThermaltake Toughpower GT 1000WUndercutting the ASRock Phantom Gaming PG-1600G on price when we checked

Scroll sideways to see every column.

A 24-pin ATX connector seen from the pin side
A 24-pin ATX connector seen from the pin side

Key specs side by side

The ASRock Phantom Gaming PG-1600G leads on rated output at 1600W, ahead of the be quiet! Dark Power Pro 14 IO 1600W at 1600W. "Not listed" marks depth where the be quiet! Dark Power Pro 14 IO 1600W, the Super Flower Leadex VII XP PRO 1200W and the Seasonic Vertex PX-1200 leave the figure out.

Power supplieWattageNative 12V-2x6 cablesDepth80 Plus rating
ASRock Phantom Gaming PG-1600G1600W2180mmGold
be quiet! Dark Power Pro 14 IO 1600W1600W1Not listedTitanium
Super Flower Leadex VII XP PRO 1200W1200W1Not listedPlatinum
Seasonic Vertex PX-12001200W1Not listedPlatinum
Thermaltake Toughpower GT 1000W1000W1140mmGold

Scroll sideways to see every column.

By price at the time of writing

At our last check the cheapest pick, the Thermaltake Toughpower GT 1000W, sat in the $50 to $100 tier, 3 tiers in all up to the be quiet! Dark Power Pro 14 IO 1600W at $250 to $500; Amazon prices move, so recheck before buying.

Price tierPower supplies
About $50 to $100Thermaltake Toughpower GT 1000W
About $150 to $250ASRock Phantom Gaming PG-1600G, Super Flower Leadex VII XP PRO 1200W
About $250 to $500Seasonic Vertex PX-1200, be quiet! Dark Power Pro 14 IO 1600W
An 8-pin power connector held up to the camera
An 8-pin power connector held up to the camera

Frequently Asked Questions

Modular cable sockets on the back of a power supply
Modular cable sockets on the back of a power supply

Is the ASRock Phantom Gaming PG-1600G ahead of the be quiet! Dark Power Pro 14 IO 1600W on native 12V-2x6 cable count?

The ASRock Phantom Gaming PG-1600G leads at 2, with the be quiet! Dark Power Pro 14 IO 1600W at 1.

Which has the shallowest depth: the Thermaltake Toughpower GT 1000W or the ASRock Phantom Gaming PG-1600G?

The Thermaltake Toughpower GT 1000W is lowest on depth at 140mm; the ASRock Phantom Gaming PG-1600G follows at 180mm, 22% apart. No depth figure is published for the be quiet! Dark Power Pro 14 IO 1600W, the Super Flower Leadex VII XP PRO 1200W and the Seasonic Vertex PX-1200, which leaves 2 of 5 picks ranked here.

Is the be quiet! Dark Power Pro 14 IO 1600W worth paying more than the Thermaltake Toughpower GT 1000W?

The spec sheets show rated output (1600W against 1000W) in its favour. The Thermaltake Toughpower GT 1000W sat in the $50 to $100 tier and the be quiet! Dark Power Pro 14 IO 1600W in the $250 to $500 tier when we checked, with 3 other picks between them; pay the difference only if rated output decides your purchase.

What makes the ASRock Phantom Gaming PG-1600G the Most Native 12V-2x6 Cables?

It earns the label for the most native 12V-2x6 cable count here (2). The be quiet! Dark Power Pro 14 IO 1600W is next on native 12V-2x6 cable count at 1, so this pick's 2 is 100% further out. It gives up depth (180mm against 140mm) to the Thermaltake Toughpower GT 1000W, the cheapest pick. It suits anyone who puts native 12V-2x6 cable count first.

Do the ASRock Phantom Gaming PG-1600G and the be quiet! Dark Power Pro 14 IO 1600W differ on 80 Plus rating?

The ASRock Phantom Gaming PG-1600G and the Thermaltake Toughpower GT 1000W use Gold; the be quiet! Dark Power Pro 14 IO 1600W uses titanium; the Super Flower Leadex VII XP PRO 1200W and the Seasonic Vertex PX-1200 use platinum.

What should I check before buying the ASRock Phantom Gaming PG-1600G?

The ASRock Phantom Gaming PG-1600G comes with 2 native 12V-2x6 cables, so a 16-pin card plugs in without an adapter. In this guide it ranks first of 5, as our Most Native 12V-2x6 Cables pick, and first of 5 on rated output (1600W).

Bottom Line

Our first pick is the ASRock Phantom Gaming PG-1600G, chosen for the most native 12V-2x6 cable count here (2). Look at the be quiet! Dark Power Pro 14 IO 1600W for monitoring and control through be quiet!'s IO Center software at the highest price in the group, the Super Flower Leadex VII XP PRO 1200W for listed voltage regulation within ±0.5% on the main rails and the Seasonic Vertex PX-1200 for Seasonic's hybrid silent fan control if those matter more to you.

Seat the 12V-2x6 plug fully and avoid tight bends near the connector.

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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