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 Alex Morgan, PC Hardware Editor
12 min read5 products evaluated

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.

Most Native 12V-2x6 Cables
ASRock Phantom Gaming PG-1600GThe 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)
Premium Pick
be quiet! Dark Power Pro 14 IO 1600WMonitoring 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)
Also Consider
Super Flower Leadex VII XP PRO 1200WListed 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)
Strong Alternative
Seasonic Vertex PX-1200Seasonic'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)
Lowest Price Here
Thermaltake Toughpower GT 1000WUndercutting 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)
| Pick | Why it stands out | Best for | Check price |
|---|---|---|---|
![]() | The most native 12V-2x6 cable count here (2). | Buyers who put native 12V-2x6 cable count first. | Check price for ASRock Phantom Gaming PG-1600G on Amazon (opens in a new tab) |
![]() | Monitoring and control through be quiet!'s IO Center software at the highest price in the group. | 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) |
![]() | Listed voltage regulation within ±0.5% on the main rails. | 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) |
![]() | Seasonic's hybrid silent fan control. | Buyers who want Seasonic's hybrid silent fan control. | Check price for Seasonic Vertex PX-1200 on Amazon (opens in a new tab) |
![]() | Undercutting the ASRock Phantom Gaming PG-1600G on price when we checked. | 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.
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.
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.
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.
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.
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.

- 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.
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.
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 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.
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 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
| Priority | Consider | Why |
|---|---|---|
| Buyers who put native 12V-2x6 cable count first | ASRock Phantom Gaming PG-1600G | The most native 12V-2x6 cable count here (2) |
| Buyers for whom price is not the deciding factor, since the Thermaltake Toughpower GT 1000W costs less | 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 |
| Buyers who want listed voltage regulation within ±0.5% on the main rails | Super Flower Leadex VII XP PRO 1200W | Listed voltage regulation within ±0.5% on the main rails |
| Buyers who want Seasonic's hybrid silent fan control | Seasonic Vertex PX-1200 | Seasonic's hybrid silent fan control |
| Spending as little as possible, with the ASRock Phantom Gaming PG-1600G the next step up | Thermaltake Toughpower GT 1000W | Undercutting the ASRock Phantom Gaming PG-1600G on price when we checked |
Scroll sideways to see every column.

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 supplie | Wattage | Native 12V-2x6 cables | Depth | 80 Plus rating |
|---|---|---|---|---|
| ASRock Phantom Gaming PG-1600G | 1600W | 2 | 180mm | Gold |
| be quiet! Dark Power Pro 14 IO 1600W | 1600W | 1 | Not listed | Titanium |
| Super Flower Leadex VII XP PRO 1200W | 1200W | 1 | Not listed | Platinum |
| Seasonic Vertex PX-1200 | 1200W | 1 | Not listed | Platinum |
| Thermaltake Toughpower GT 1000W | 1000W | 1 | 140mm | Gold |
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 tier | Power supplies |
|---|---|
| About $50 to $100 | Thermaltake Toughpower GT 1000W |
| About $150 to $250 | ASRock Phantom Gaming PG-1600G, Super Flower Leadex VII XP PRO 1200W |
| About $250 to $500 | Seasonic Vertex PX-1200, be quiet! Dark Power Pro 14 IO 1600W |

Frequently Asked Questions

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.
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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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