Buying Guide
The Best 80 Plus Platinum Power Supplies
Six 80 Plus Platinum units in ATX, SFX and SFX-L sizes from 750W to 1200W, compared on warranty, size and price.
By The PC Journal editorial team
12 min read6 products evaluated
80 Plus Platinum units waste less power as heat than Gold ones, which matters most at high load and in small cases. They cost more, so the gain is usually quieter running rather than a lower power bill.
We compared wattage, efficiency ratings, connectors and warranty from each listing; we did not load-test these units.
Quick Picks
Our 6 recommendations at a glance. Tap a pick for the full verdict.
Best Value Platinum
be quiet! Power Zone 2 850W
Platinum from both 80 Plus and Cybenetics at 850W.
Best for: Most high-end builds.
Our take Check price for be quiet! Power Zone 2 850W (opens in a new tab)
Best 1200W Platinum
Super Flower Leadex VII XP PRO 1200W
1200W with dual Platinum ratings.
Best for: Flagship GPUs.
Our take Check price for Super Flower Leadex VII XP PRO 1200W (opens in a new tab)
Best Warranty
ASUS ROG Strix 1000W Platinum
A 10-year warranty on a 1000W Platinum unit.
Best for: Long-term builds.
Our take Check price for ASUS ROG Strix 1000W Platinum (opens in a new tab)
Best SFX-L
ASUS ROG Loki SFX-L 750W Platinum
SFX-L Platinum with a 120mm fan.
Best for: Small cases with SFX-L room.
Our take Check price for ASUS ROG Loki SFX-L 750W Platinum (opens in a new tab)
Best 750W SFX
CORSAIR SF750 (2024)
750W Platinum in SFX size.
Best for: Mini-ITX builds.
Our take Check price for CORSAIR SF750 (2024) (opens in a new tab)
Most Power in SFX
LIAN LI SP1000P
1000W Platinum in a 100mm SFX body.
Best for: High-end small builds.
Our take Check price for LIAN LI SP1000P (opens in a new tab)
Our Picks
Best Value Platinum1 of 6
be quiet! Power Zone 2 850W on Amazon (opens in a new tab)
be quiet!'s Power Zone 2 850W is rated Platinum by both 80 Plus and Cybenetics.
Best for
- Most high-end builds.
Skip if
- Choose another pick if you can't accept this: rated output of 850W, behind the Super Flower Leadex VII XP PRO 1200W (1200W).
Why we like it
Its 140mm Pure Wings 3 fan stops at low load, and it has a native 12V-2x6 cable. Its 850W rated output ranks fourth of 6 here, behind the Super Flower Leadex VII XP PRO 1200W (1200W) and ahead of the CORSAIR SF750 (750W). The be quiet! Power Zone 2 850W comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter.
It also has 3 PCIe 8-pin connectors for cards that use 8-pin power. No depth is rated for the be quiet! Power Zone 2 850W, so check the maker's page against your case's PSU bay. It cost the least of the 6 picks at the time of writing, with the ASUS ROG Loki SFX-L 750W Platinum the next step up. There is no published warranty figure, whereas the ASUS ROG Strix 1000W Platinum offers 10 years.
Key dimensions & specs
- Wattage: 850W
- Native 12V-2x6 cables: 1
- PCIe 8-pin connectors: 3
- 80 Plus rating: Platinum
- Cybenetics rating: Platinum
- ATX version: ATX 3.1
- Form factor: ATX
- Fan: 140mm
- Fan stop: Yes
- Colour: Black
Pros
- A 850W rating
- A native 12V-2x6 cable for 16-pin cards
- 80 Plus Platinum efficiency
- ATX 3.1 compliance
Cons
- Rated output of 850W, behind the Super Flower Leadex VII XP PRO 1200W (1200W)
Best 1200W Platinum2 of 6
Super Flower Leadex VII XP PRO 1200W on Amazon (opens in a new tab)
Super Flower's Leadex VII XP PRO 1200W carries Platinum ratings from both 80 Plus and Cybenetics.
Best for
- Flagship GPUs.
Skip if
- If budget leads, the be quiet! Power Zone 2 850W was cheaper at our last price check.
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. Its 1200W rated output is the highest here; the ASUS ROG Strix 1000W Platinum comes next at 1000W.
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. Its price falls between the LIAN LI SP1000P and the ASUS ROG Strix 1000W Platinum, based on our last check. Buyers who need a confirmed warranty should compare it with the ASUS ROG Strix 1000W Platinum, which offers 10 years.
Key dimensions & 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 be quiet! Power Zone 2 850W at the time of writing
Best Warranty3 of 6
ASUS ROG Strix 1000W Platinum on Amazon (opens in a new tab)
ASUS's ROG Strix 1000W Platinum uses GaN MOSFETs and GPU-first voltage sensing on the graphics card rail.
Best for
- Long-term builds.
Skip if
- Price-first buyers should look at the be quiet! Power Zone 2 850W, which cost less when we checked.
Why we like it
It carries a Cybenetics LAMBDA A noise rating and a 10-year warranty. GaN MOSFETs raise efficiency, large ROG heatsinks cut temperatures and noise, and 0dB mode keeps it silent during light gaming. On rated output it ties with the LIAN LI SP1000P at 1000W.
The ASUS ROG Strix 1000W Platinum has no stated native 12V-2x6 cable; confirm the cable kit before pairing it with a 16-pin card. No depth is rated for the ASUS ROG Strix 1000W Platinum, so check the maker's page against your case's PSU bay. It was the most expensive pick when we checked, so weigh what it adds over the Super Flower Leadex VII XP PRO 1200W. Buyers who need a confirmed native 12V-2x6 cable count should compare it with the be quiet! Power Zone 2 850W, which offers 1.
Key dimensions & specs
- Wattage: 1000W
- Warranty: 10 years
- 80 Plus rating: Platinum
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan stop: Yes
- Colour: Black
Pros
- 1000W of rated output for high-power cards
- A 10-year warranty
- 80 Plus Platinum efficiency
- ATX 3.1 compliance
Cons
- Costs more than the be quiet! Power Zone 2 850W at the time of writing
Best SFX-L4 of 6
ASUS ROG Loki SFX-L 750W Platinum on Amazon (opens in a new tab)
The ROG Loki is an SFX-L unit, so it uses a 120mm fan instead of the 92mm fan common in SFX.
Best for
- Small cases with SFX-L room.
Skip if
- Skip it if price comes first: the be quiet! Power Zone 2 850W cost less when we checked.
Why we like it
It carries 80 Plus Platinum, a LAMBDA A noise rating and a 10-year warranty. It is Lambda A certified at under 25dB, and a 16-pin cable delivers up to 600W to PCIe 5.0 cards. ROG heatsinks cool key parts.
On rated output it ties with the CORSAIR SF750 at 750W. It also comes with a 120mm fan, larger than standard SFX and ROG heatsinks over key components. The ASUS ROG Loki SFX-L 750W Platinum has no stated native 12V-2x6 cable; confirm the cable kit before pairing it with a 16-pin card.
No depth is rated for the ASUS ROG Loki SFX-L 750W Platinum, so check the maker's page against your case's PSU bay. Its price falls between the be quiet! Power Zone 2 850W and the CORSAIR SF750, based on our last check. Buyers who need a confirmed native 12V-2x6 cable count should compare it with the be quiet! Power Zone 2 850W, which offers 1.
Key dimensions & specs
- Wattage: 750W
- Warranty: 10 years
- 80 Plus rating: Platinum
- Form factor: SFX-L
- Cabling: Fully modular
- Fan: 120mm
- Colour: Black
Pros
- A 750W rating
- A 10-year warranty
- 80 Plus Platinum efficiency
- Fully modular cables
Cons
- Costs more than the be quiet! Power Zone 2 850W at the time of writing
Best 750W SFX5 of 6
CORSAIR SF750 (2024) on Amazon (opens in a new tab)
Corsair's 2024 SF750 is a fully modular 80 Plus Platinum SFX unit with ATX 3.1 support.
Best for
- Mini-ITX builds.
Skip if
- Skip it if rated output matters most to you; the Super Flower Leadex VII XP PRO 1200W offers 1200W.
Why we like it
It uses a 92mm fluid-dynamic-bearing fan and 105C-rated Japanese capacitors. It matches the ASUS ROG Loki SFX-L 750W Platinum on rated output (750W). The CORSAIR SF750 has no stated native 12V-2x6 cable; confirm the cable kit before pairing it with a 16-pin card.
No depth is rated for the CORSAIR SF750, so check the maker's page against your case's PSU bay. It was priced above the ASUS ROG Loki SFX-L 750W Platinum and below the LIAN LI SP1000P at the time of writing. It gives ground on rated output, where the Super Flower Leadex VII XP PRO 1200W offers 1200W.
Key dimensions & specs
- Wattage: 750W
- 80 Plus rating: Platinum
- ATX version: ATX 3.1
- Form factor: SFX
- Cabling: Fully modular
- Fan: 92mm
- Colour: Black
Pros
- A 750W rating
- 80 Plus Platinum efficiency
- ATX 3.1 compliance
- Fully modular cables
Cons
- Rated output trails the Super Flower Leadex VII XP PRO 1200W (1200W)
- Costs more than the be quiet! Power Zone 2 850W at the time of writing
Most Power in SFX6 of 6
LIAN LI SP1000P on Amazon (opens in a new tab)
Lian Li's SP1000P fits 1000W and 80 Plus Platinum into a standard 100mm-deep SFX body.
Best for
- High-end small builds.
Skip if
- Skip it if price comes first: the be quiet! Power Zone 2 850W cost less when we checked.
Why we like it
The fan stops at low load, and an SFX-to-ATX bracket comes in the box. It matches the ASUS ROG Strix 1000W Platinum on rated output (1000W). The LIAN LI SP1000P has no stated native 12V-2x6 cable; confirm the cable kit before pairing it with a 16-pin card.
At 100mm deep, compare it with your case's PSU clearance before buying. When we checked, only the CORSAIR SF750 and cheaper picks cost less, and the Super Flower Leadex VII XP PRO 1200W cost more. If you want a confirmed native 12V-2x6 cable count, look to the be quiet! Power Zone 2 850W instead: it offers 1, while this one gives no figure.
Key dimensions & specs
- Wattage: 1000W
- Depth: 100mm
- 80 Plus rating: Platinum
- Form factor: SFX
- Fan stop: Yes
- Colour: Black
Pros
- 1000W of rated output for high-power cards
- A short 100mm body
- 80 Plus Platinum efficiency
- A fan that stops at low load
Cons
- Costs more than the be quiet! Power Zone 2 850W 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.
- Build and warranty
- We checked depth, modular cabling, fan-stop modes and warranty length.
- Wattage
- We compared rated output with NVIDIA's or AMD's recommended system power for the card.
- Connectors
- We recorded native 12V-2x6 cables and PCIe 8-pin connectors where the listing states them.
What to Look for in an 80 Plus Platinum PSUs
Key buying criteria so you get the right fit the first time.
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.
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.
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.
How to Choose an 80 Plus Platinum PSUs
By priority
| Priority | Consider | Why |
|---|---|---|
| Most high-end builds | be quiet! Power Zone 2 850W | Platinum from both 80 Plus and Cybenetics at 850W |
| Flagship GPUs | Super Flower Leadex VII XP PRO 1200W | 1200W with dual Platinum ratings |
| Long-term builds | ASUS ROG Strix 1000W Platinum | A 10-year warranty on a 1000W Platinum unit |
| Small cases with SFX-L room | ASUS ROG Loki SFX-L 750W Platinum | SFX-L Platinum with a 120mm fan |
| Mini-ITX builds | CORSAIR SF750 | 750W Platinum in SFX size |
| High-end small builds | LIAN LI SP1000P | 1000W Platinum in a 100mm SFX body |
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 | 80 Plus rating |
|---|---|---|---|---|
| be quiet! Power Zone 2 850W | 850W | 1 | Not listed | Platinum |
| Super Flower Leadex VII XP PRO 1200W | 1200W | 1 | Not listed | Platinum |
| ASUS ROG Strix 1000W Platinum | 1000W | Not listed | 10 years | Platinum |
| ASUS ROG Loki SFX-L 750W Platinum | 750W | Not listed | 10 years | Platinum |
| CORSAIR SF750 | 750W | Not listed | Not listed | Platinum |
| LIAN LI SP1000P | 1000W | Not listed | Not listed | Platinum |
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 $100 to $150 | be quiet! Power Zone 2 850W, ASUS ROG Loki SFX-L 750W Platinum |
| About $150 to $250 | CORSAIR SF750, LIAN LI SP1000P, Super Flower Leadex VII XP PRO 1200W, ASUS ROG Strix 1000W Platinum |
Frequently Asked Questions
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.
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.
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 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.
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.
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.
Bottom Line
be quiet!'s Power Zone 2 850W is the best-value Platinum unit, and Super Flower's Leadex VII XP PRO covers 1200W. The ROG Strix 1000W has a 10-year warranty, and Corsair's SF750 and Lian Li's SP1000P suit small cases.