Buying Guide
The Best Fully Modular PSUs
Five power supplies ranked on rated output and native 12V-2x6 cable count; the darkFlash DG750 is the cheapest route in.
By The PC Journal editorial team
12 min read5 products evaluated
A fully modular PSU lets you fit only the cables you use, including the 24-pin. Every pick is fully modular at 850W or less, ordered from the lowest price.
Rankings weigh wattage, native 12V-2x6 cables and ATX version as the makers state them; if a maker skips native 12V-2x6 cables, the guide says so rather than guess, since we have not benched them.
Quick Picks
Our 5 recommendations at a glance. Tap a pick for the full verdict.
Lowest Price Here
darkFlash DG750
A lower price than the SAMA GT650 White and the rest when we checked.
Best for: Spending as little as possible.
Our take Check price for darkFlash DG750 (opens in a new tab)
Also Consider
SAMA GT650 White
An ECO silent mode for low-load quiet.
Best for: Buyers who want ECO silent mode for low-load quiet.
Our take Check price for SAMA GT650 White (opens in a new tab)
Strong Alternative
SAMA GT750
Japanese capacitors with an LLC and DC-DC design.
Best for: Buyers who want Japanese capacitors with an LLC and DC-DC design.
Worth a Look
CORSAIR RM750e (ATX 3.1)
105°C-rated capacitors.
Best for: Buyers who want 105°C-rated capacitors.
Our take Check price for CORSAIR RM750e (ATX 3.1) (opens in a new tab)
Solid Runner-Up
CORSAIR RM750e White (ATX 3.1)
White housing with matching white cables.
Best for: Buyers who want white housing with matching white cables.
Our take Check price for CORSAIR RM750e White (ATX 3.1) (opens in a new tab)
| Pick | Why it’s here | Best for | Price |
|---|---|---|---|
| A lower price than the SAMA GT650 White and the rest when we checked. | Spending as little as possible. | Check price for darkFlash DG750 (opens in a new tab) |
| An ECO silent mode for low-load quiet. | Buyers who want ECO silent mode for low-load quiet. | Check price for SAMA GT650 White (opens in a new tab) |
| Japanese capacitors with an LLC and DC-DC design. | Buyers who want Japanese capacitors with an LLC and DC-DC design. | Check price for SAMA GT750 (opens in a new tab) |
| 105°C-rated capacitors. | Buyers who want 105°C-rated capacitors. | Check price for CORSAIR RM750e (ATX 3.1) (opens in a new tab) |
| White housing with matching white cables. | Buyers who want white housing with matching white cables. | Check price for CORSAIR RM750e White (ATX 3.1) (opens in a new tab) |
Our Picks
Lowest Price Here1 of 5
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
- Spending as little as possible.
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, 80 Plus Gold rated, and backed by a 5-year limited warranty. Its fully modular cables reduce clutter for first-time builders.
It matches the SAMA GT750, the CORSAIR RM750e and the CORSAIR RM750e White on rated output (750W). Like the SAMA GT750 and CORSAIR RM750e, it has a black colour, while the SAMA GT650 White uses a white colour. 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 cost the least of the 5 picks at the time of writing, with the SAMA GT650 White 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
Also Consider2 of 5
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
- Buyers who want ECO silent mode for low-load quiet.
Skip if
- Skip it if rated output matters most to you; the darkFlash DG750 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. On rated output it trails the group at 650W, while the darkFlash DG750 offers 750W.
It shares a white colour with the CORSAIR RM750e White; the SAMA GT750 goes with 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. Its price falls between the darkFlash DG750 and the SAMA GT750, based on our last check.
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 darkFlash DG750 (750W)
- Costs more than the darkFlash DG750 at the time of writing
Strong Alternative3 of 5
SAMA GT750 on Amazon (opens in a new tab)
SAMA's GT750 uses Japanese capacitors with an LLC and DC-DC design, a native 12V-2x6 cable and an ECO silent mode for low loads.
Best for
- Buyers who want Japanese capacitors with an LLC and DC-DC design.
Skip if
- If budget leads, the darkFlash DG750 was cheaper at our last price check.
Why we like it
Its ECO silent mode keeps the 120mm FDB fan quiet at low load, and Japanese capacitors with LLC and DC-DC topology support long-term stability. Embossed modular cables are easier to route. Its embossed modular cables improve airflow and make routing simpler.
It matches the darkFlash DG750, the CORSAIR RM750e and the CORSAIR RM750e White on rated output (750W). Like the darkFlash DG750 and CORSAIR RM750e, it has a black colour, while the SAMA GT650 White uses a white colour. The SAMA GT750 comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter.
No depth is rated for the SAMA GT750, so check the maker's page against your case's PSU bay. It was priced above the SAMA GT650 White and below the CORSAIR RM750e at the time of writing. It gives ground on native 12V-2x6 cable count, where the darkFlash DG750 offers 1.
Key dimensions & specs
- Wattage: 750W
- Native 12V-2x6 cables: 1
- Cybenetics rating: Gold
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan: 120mm
- Fan stop: Yes
- Colour: Black
Pros
- A 750W rating
- A native 12V-2x6 cable for 16-pin cards
- ATX 3.1 compliance
- Fully modular cables
Cons
- Costs more than the darkFlash DG750 at the time of writing
Worth a Look4 of 5
CORSAIR RM750e (ATX 3.1) on Amazon (opens in a new tab)
The CORSAIR RM750e is built around 105°C-rated capacitors, with Modern Standby support on top.
Best for
- Buyers who want 105°C-rated capacitors.
Skip if
- Pass if a published native 12V-2x6 cable count matters; this one has none.
Why we like it
On the spec sheet, it offers a 750W rated output and offers a 120mm fan. It is Intel ATX 3.1 certified and handles 2x GPU transient spikes, and a 120mm rifle-bearing fan follows a quiet fan curve. Cables are fully modular.
Its fully modular cabling keeps a build tidy. It matches the darkFlash DG750, the SAMA GT750 and the CORSAIR RM750e White on rated output (750W). Like the darkFlash DG750 and SAMA GT750, it has a black colour, while the SAMA GT650 White uses a white colour.
The CORSAIR RM750e 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 RM750e, so check the maker's page against your case's PSU bay. It was priced above the SAMA GT750 and below the CORSAIR RM750e White at the time of writing. There is no published native 12V-2x6 cable count figure, whereas the darkFlash DG750 offers 1.
Key dimensions & specs
- Wattage: 750W
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan: 120mm
- Colour: Black
Pros
- A 750W rating
- ATX 3.1 compliance
- Fully modular cables
- 105°C-rated capacitors
Cons
- No published native 12V-2x6 cable count
- Costs more than the darkFlash DG750 at the time of writing
Solid Runner-Up5 of 5
CORSAIR RM750e White (ATX 3.1) on Amazon (opens in a new tab)
What the CORSAIR RM750e White brings to the table is white housing with matching white cables, plus 105°C-rated capacitors.
Best for
- Buyers who want white housing with matching white cables.
Skip if
- Its native 12V-2x6 cable count is not published, which rules it out if you need that number.
Why we like it
It also offers a 750W rated output and offers a 120mm fan. It is Intel ATX 3.1 certified, handles 2x GPU transient spikes, and supports Modern Standby for fast wake times. The fully modular cables keep builds tidy.
It uses 105°C-rated capacitors for steady power. It shares a white colour with the SAMA GT650 White; the CORSAIR RM750e goes with a black colour. The CORSAIR RM750e White 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 RM750e White, so check the maker's page against your case's PSU bay. The maker doesn't give its native 12V-2x6 cable count; if that figure matters, the darkFlash DG750 offers 1.
Key dimensions & specs
- Wattage: 750W
- ATX version: ATX 3.1
- Form factor: ATX
- Cabling: Fully modular
- Fan: 120mm
- Colour: White
Pros
- A 750W rating
- ATX 3.1 compliance
- Fully modular cables
- White housing with matching white cables
Cons
- No published native 12V-2x6 cable count
- 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.
- Price
- We grouped picks by price at the time of writing.
- 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.
- Build and warranty
- We checked depth, modular cabling, fan-stop modes and warranty length.
What to Look for in a Fully Modular PSUs
Key buying criteria so you get the right fit the first time.
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.
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.
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.
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.
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.
How to Choose a Fully Modular PSUs
By priority
| Priority | Consider | Why |
|---|---|---|
| Spending as little as possible | darkFlash DG750 | A lower price than the SAMA GT650 White and the rest when we checked |
| Buyers who want ECO silent mode for low-load quiet | SAMA GT650 White | An ECO silent mode for low-load quiet |
| Buyers who want Japanese capacitors with an LLC and DC-DC design | SAMA GT750 | Japanese capacitors with an LLC and DC-DC design |
| Buyers who want 105°C-rated capacitors | CORSAIR RM750e | 105°C-rated capacitors |
| Buyers who want white housing with matching white cables | CORSAIR RM750e White | White housing with matching white cables |
Scroll sideways to see every column.
Key specs side by side
Figures as each maker states them.
| Power supplie | Wattage | Native 12V-2x6 cables | ATX version | Form factor |
|---|---|---|---|---|
| darkFlash DG750 | 750W | 1 | ATX 3.1 | ATX |
| SAMA GT650 White | 650W | 1 | ATX 3.1 | ATX |
| SAMA GT750 | 750W | 1 | ATX 3.1 | ATX |
| CORSAIR RM750e | 750W | Not listed | ATX 3.1 | ATX |
| CORSAIR RM750e White | 750W | Not listed | ATX 3.1 | ATX |
Scroll sideways to see every column.
Frequently Asked Questions
How do these power supplies compare on rated output?
The darkFlash DG750, at 750W. The SAMA GT750 follows at 750W, while the SAMA GT650 White has 650W.
Which is the cheapest pick in this guide?
Start with the darkFlash DG750, the lowest-priced pick when we checked. The CORSAIR RM750e White is the premium end, so the spread between them shows what extra money buys here.
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.
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
Our first pick is the darkFlash DG750, chosen for a lower price than the SAMA GT650 White and the rest when we checked. Look at the SAMA GT650 White for an ECO silent mode for low-load quiet, the SAMA GT750 for Japanese capacitors with an LLC and DC-DC design and the CORSAIR RM750e for 105°C-rated capacitors if those matter more to you.
Never mix modular cables between PSU brands or models.