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 Alex Morgan, PC Hardware Editor
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 warranty 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
Which of the 5 picks to look at first. Tap a name for the full analysis.
Lowest Price Here
darkFlash DG750A lower price than the SAMA GT650 White and the rest when we checked.
Best for: Spending as little as possible, with the SAMA GT650 White the next step up.
Check price for darkFlash DG750 on Amazon (opens in a new tab)
Also Consider
SAMA GT650 WhiteAn ECO silent mode for low-load quiet.
Best for: Buyers who want ECO silent mode for low-load quiet.
Check price for SAMA GT650 White on Amazon (opens in a new tab)
Strong Alternative
SAMA GT750Japanese capacitors with an LLC and DC-DC design.
Best for: Buyers who want Japanese capacitors with an LLC and DC-DC design.
Check price for SAMA GT750 on Amazon (opens in a new tab)
Worth a Look
CORSAIR RM750e (ATX 3.1)105°C-rated capacitors.
Best for: Buyers who want 105°C-rated capacitors.
Check price for CORSAIR RM750e (ATX 3.1) on Amazon (opens in a new tab)
Premium Pick
LIAN LI SP750 V2The top of this price range, adding a two-tone 12V-2x6 cable that shows whether it is seated.
Best for: Spending more than the CORSAIR RM750e costs for the fullest feature set in this group.
Check price for LIAN LI SP750 V2 on Amazon (opens in a new tab)
| Pick | Why it stands out | Best for | Check price |
|---|---|---|---|
| A lower price than the SAMA GT650 White and the rest when we checked. | Spending as little as possible, with the SAMA GT650 White the next step up. | Check price for darkFlash DG750 on Amazon (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 on Amazon (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 on Amazon (opens in a new tab) |
| 105°C-rated capacitors. | Buyers who want 105°C-rated capacitors. | Check price for CORSAIR RM750e (ATX 3.1) on Amazon (opens in a new tab) |
| The top of this price range, adding a two-tone 12V-2x6 cable that shows whether it is seated. | Spending more than the CORSAIR RM750e costs for the fullest feature set in this group. | Check price for LIAN LI SP750 V2 on Amazon (opens in a new tab) |
Our Picks
Lowest Price Here1 of 5
darkFlash DG750
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, with the SAMA GT650 White the next step up.
Skip if
- Pass on it if a shorter 5-year warranty 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 LIAN LI SP750 V2 on rated output (750W). 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 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
- Warranty of 5 years, behind the LIAN LI SP750 V2 (10 years)
The catch
What it gives up: warranty of 5 years, behind the LIAN LI SP750 V2 (10 years); by contrast, the LIAN LI SP750 V2 offers 10 years.
Also Consider2 of 5
SAMA GT650 White
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.
A white colour is unique to it among these picks, while the SAMA GT750 uses 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 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
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 LIAN LI SP750 V2 on rated output (750W). 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. There is no published warranty figure, whereas the LIAN LI SP750 V2 offers 10 years.
Key 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)
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 LIAN LI SP750 V2 on rated output (750W). 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 LIAN LI SP750 V2 at the time of writing.
Key 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
The catch
There is no published native 12V-2x6 cable count figure, whereas the darkFlash DG750 offers 1.
Premium Pick5 of 5
LIAN LI SP750 V2
Lian Li's SP750 V2 is an SFX unit with a two-tone 12V-2x6 cable that shows whether the plug is fully seated.
Best for
- Spending more than the CORSAIR RM750e costs for the fullest feature set in this group.
Skip if
- If budget leads, the darkFlash DG750 was cheaper at our last price check.
Why we like it
It has a 10-year warranty. A 92mm FDB fan keeps it quiet, and its upgraded 3A standby rail helps USB devices while the PC sleeps. Lian Li backs it with 10-year hardware protection.
It matches the darkFlash DG750, the SAMA GT750 and the CORSAIR RM750e on rated output (750W). The LIAN LI SP750 V2 comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. No depth is rated for the LIAN LI SP750 V2, so check the maker's page against your case's PSU bay.
Only the CORSAIR RM750e came close to it on price at the time of writing; it cost the most of the 5 picks. It gives ground on native 12V-2x6 cable count, where the darkFlash DG750 offers 1.
Key specs
- Wattage
- 750W
- Native 12V-2x6 cables
- 1
- Warranty
- 10 years
- 80 Plus rating
- Gold
- ATX version
- ATX 3.1
- Form factor
- SFX
- Cabling
- Fully modular
- Fan
- 92mm
- 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
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, warranty and 80 Plus rating, using each maker's published specs. We did not test them in-house, and native 12V-2x6 cable count and warranty are missing for at least one pick.
- What every pick has in common
- All 5, from the darkFlash DG750 to the LIAN LI SP750 V2, state rated output, ATX version and form factor and share ATX 3.1 ATX version and Fully modular cabling.
- Where the specs have gaps
- The CORSAIR RM750e gives no native 12V-2x6 cable count; the SAMA GT650 White, the SAMA GT750 and the CORSAIR RM750e give no warranty.
- Price range
- At our last check the picks ran from the darkFlash DG750 ($50 to $100) to the LIAN LI SP750 V2 ($100 to $150).
What to Look for in a Fully Modular PSUs
Key buying criteria so you get the right fit the first time.
How much rated output you need
Across these 5 picks rated output spans 650W (the SAMA GT650 White) to 750W (the darkFlash DG750). If rated output is your first filter, the darkFlash DG750 sets the ceiling at 750W.
Warranty
The LIAN LI SP750 V2 tops warranty at 10 years and the darkFlash DG750 sits lowest at 5 years. The LIAN LI SP750 V2 is the pick for warranty. The SAMA GT650 White, the SAMA GT750 and the CORSAIR RM750e give no warranty figure, so 2 of 5 picks are compared here.
A 24-pin ATX power cable held in a hand Setup checks
The darkFlash DG750 comes with a native 12V-2x6 cable, so a 16-pin card plugs in without an adapter. The CORSAIR RM750e has no stated native 12V-2x6 cable; confirm the cable kit before pairing it with a 16-pin card.
Extras that separate them
The SAMA GT750: an ECO silent mode for low load. The CORSAIR RM750e: Modern Standby support. The LIAN LI SP750 V2: a 92mm FDB fan.
A 24-pin ATX connector seen from the pin side How much to spend
$50 to $100 buys the darkFlash DG750, the SAMA GT650 White, the SAMA GT750 and the CORSAIR RM750e; $100 to $150 buys the LIAN LI SP750 V2 at our last check.
How to Choose a Fully Modular PSUs
By priority
| Priority | Consider | Why |
|---|---|---|
| Spending as little as possible, with the SAMA GT650 White the next step up | 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 |
| Spending more than the CORSAIR RM750e costs for the fullest feature set in this group | LIAN LI SP750 V2 | The top of this price range, adding a two-tone 12V-2x6 cable that shows whether it is seated |
Scroll sideways to see every column.
Key specs side by side
The darkFlash DG750 leads on rated output at 750W, ahead of the SAMA GT750 at 750W. "Not listed" marks native 12V-2x6 cable count where the CORSAIR RM750e leaves the figure out.
| Power supplie | Wattage | Native 12V-2x6 cables | Warranty | 80 Plus rating |
|---|---|---|---|---|
| darkFlash DG750 | 750W | 1 | 5 years | Gold |
| SAMA GT650 White | 650W | 1 | Not listed | Not listed |
| SAMA GT750 | 750W | 1 | Not listed | Not listed |
| CORSAIR RM750e | 750W | Not listed | Not listed | Not listed |
| LIAN LI SP750 V2 | 750W | 1 | 10 years | Gold |
Scroll sideways to see every column.
By price at the time of writing
The darkFlash DG750 was the lowest-priced pick ($50 to $100) and the LIAN LI SP750 V2 the highest ($100 to $150) when we checked; tiers move with Amazon pricing.
| Price tier | Power supplies |
|---|---|
| About $50 to $100 | darkFlash DG750, SAMA GT650 White, SAMA GT750, CORSAIR RM750e |
| About $100 to $150 | LIAN LI SP750 V2 |
Frequently Asked Questions
How does the darkFlash DG750 compare with the LIAN LI SP750 V2 on warranty?
The LIAN LI SP750 V2 leads at 10 years, with the darkFlash DG750 at 5 years. The SAMA GT650 White, the SAMA GT750 and the CORSAIR RM750e don't state a warranty figure, so they sit outside this comparison; 2 of 5 picks are ranked.
What does the LIAN LI SP750 V2 add over the darkFlash DG750?
The spec sheets show warranty (10 years against 5 years) in its favour. On our last price check the darkFlash DG750 was in the $50 to $100 tier and the LIAN LI SP750 V2 in the $100 to $150 tier, with 3 other picks between them; pay the difference only if warranty decides your purchase.
Why is the LIAN LI SP750 V2 our Premium Pick?
The label rests on the top of this price range, adding a two-tone 12V-2x6 cable that shows whether it is seated. The darkFlash DG750, the cheapest pick, sat in the $50 to $100 tier against $100 to $150 here, without out-ranking it on any listed spec. It makes sense for spending more than the CORSAIR RM750e costs for the fullest feature set in this group.
Does the SAMA GT650 White have fan stop, and which others do?
The SAMA GT650 White and the SAMA GT750 have it. The darkFlash DG750, the CORSAIR RM750e and the LIAN LI SP750 V2 have no fan stop listed, so 2 of 5 picks are covered here.
Will the SAMA GT750 work with my setup?
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. In this guide it ranks third of 5, and second of 5 on rated output (750W).
What extras do the darkFlash DG750 and the SAMA GT650 White include?
The darkFlash DG750: a 140mm body that leaves room for cables. The SAMA GT650 White: an ECO silent mode for low-load quiet. The SAMA GT750: Japanese capacitors with an LLC and DC-DC design.
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.
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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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