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Black fully modular ATX power supply with compact 140mm depth and 120mm fan

darkFlash

darkFlash DF-DG-750-BK 750 W ATX 3.1 power supply

SKU CH-9HM7-0Q65B MPN DF-DG-750-BK

A fully modular ATX 3.1 power supply delivering 750 W with 80 PLUS Gold efficiency and a native 12V-2x6 cable for PCIe 5.1 graphics cards

  • Max wattage750 W
  • Power factor correctionActive
  • Main power connector20+4Pin
  • Efficiency certification80 PLUS GOLD Certified
  • Built-in protectionOver voltage (OVP) Over load (OPP) Over current (OCP) Under
  • Connection types6 x SATA

Wattage 750W

  • Ready for next-gen GPUs with ATX 3.1 and PCIe 5.1 support
  • 80 PLUS Gold efficiency over 90% typical load cuts energy waste
  • Fully modular cables and single +12V rail simplify builds
  • Taiwanese capacitors with DC-to-DC topology boost voltage stability
  • 120mm HDB fan and seven protections ensure quiet reliable operation

ATX 3.1 power supply for modern GPUs

The darkFlash DF-DG-750-BK is a 750 W ATX 3.1 unit built for systems that need a native 12V-2x6 connection. It targets builders upgrading to graphics cards that draw up to 600 W through the new connector. The fully modular design keeps cable routing clean inside compact cases. It suits gaming rigs and workstations that require stable single-rail +12 V delivery.

Thermals noise and power draw

A 120 mm HDB fan handles cooling while the 80 PLUS Gold rating confirms over 90 % efficiency at typical loads. Active PFC rated at 98 % reduces waste heat and lowers mains current draw. The DC-to-DC topology with Half Bridge LLC and SRC circuits maintains tight voltage regulation under shifting loads. Seven protection circuits guard against over voltage, over load, over current, under voltage, short circuit, overheat and zero load conditions.

Accessories and software impact

The box includes a native 12V-2x6 cable rated for 600 W and six SATA connectors for storage drives. All cables use 18 AWG wire and an embossed finish for easier handling. Taiwanese electrolytic capacitors and EMI filters improve long-term signal quality. No software suite is bundled; configuration relies on the motherboard BIOS and operating system power management.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $54.99
Cheaper than about 89% of the 10,869 comparable items (median $142.99).
Max wattage 750 W
Lower than about 60% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameDarkFlash
Model nameDF-DG-750-BK
Part numberDF-DG-750-BK
Product colorBlack
Product typeATX 3.1 Ready, PCIe 5.1 Ready
Ports & slots
Connection types6 x SATA
Power
Max wattage750 W
Power factor correctionActive
Main power connector20+4Pin
Efficiency certification80 PLUS GOLD Certified
Built-in protectionOver voltage (OVP)
Over load (OPP)
Over current (OCP)
Under voltage (UVP)
Short circuit (SCP)
Overheat (OTP)
Zero load (NLP)
Size & build
Product dimensions140 × 150 × 86 mm
Shipping weight2.13 kg
Package size292 × 198 × 127 mm

Other versions of this model

1 more in the same range

Questions about this item

How do I install the native 12V-2x6 cable for an RTX 50 series GPU and what step is often missed?

Connect the 12V-2x6 cable directly from the PSU to the graphics card without adapters; the step often missed is seating the connector fully until the latch clicks to meet ATX 3.1 transient-current requirements

What maintenance or replacement will this unit need later?

The 120 mm HDB fan is the only moving part; expect to clean dust from its intake periodically and replace the fan if bearing noise appears after several years

What limit shows up first under sustained heavy load?

The 750 W maximum power rating is the first hard limit; the single +12 V rail can deliver the full 750 W but cannot exceed it, so total system draw must stay below that figure

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