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Black rectangular ATX power supply with 135mm fan and modular cable sockets

darkFlash

darkFlash PMT850 850W fully modular power supply

SKU CH-AXV9-Q1FBV MPN PMT850

Fully modular 850 W ATX supply with 80 PLUS Gold and Cybenetics Platinum efficiency, ATX 3.1 and PCIe 5.1 support, native 12V-2x6 cable for 600 W GPU power, 100 % Japanese 105 °C capacitors.

  • Max wattage850 W
  • Power efficiency> 90%
  • Modular cablingFull Modular
  • Fan configuration1 × 135 mm FDB Fan
  • Efficiency certification80 PLUS GOLD Certified
  • Supply voltage100–240 V

Color Black

Wattage 850 W

  • 850 W output powers demanding RTX graphics cards
  • 80 PLUS Gold certification delivers over 90% efficiency at typical loads
  • Cybenetics Platinum rating confirms ultra-high performance and efficiency
  • 100% Japanese 105°C capacitors ensure long-term stability under heavy load
  • Fully modular design with native 12V-2x6 cable reduces clutter and supports PCIe 5.1 GPUs

Built for modern GPU power

The darkFlash PMT850 is an 850 W fully modular ATX power supply certified to 80 PLUS Gold and Cybenetics Platinum. It ships with a native 12V-2x6 cable that complies with ATX 3.1 and PCIe 5.1 specifications. All capacitors are Japanese units rated for 105 °C, and a 135 mm FDB fan handles cooling in a 150 mm deep chassis.

Suits single high-end graphics builds

This unit targets builders installing one RTX 30, 40 or 50 series card that draws up to 600 W through the 12V-2x6 connector. The fully modular cable set keeps unused leads out of the case, aiding airflow in compact ATX enclosures. Systems planning multi-GPU configurations via SLI or CrossFire should look elsewhere because the PMT850 does not support those technologies.

850 W ceiling with 600 W GPU headroom

The +12 V rail can deliver the full 850 W rating, leaving ample margin for CPU, storage and peripherals after a 600 W graphics card. Efficiency stays above 90 % at typical loads, reducing waste heat. Protection circuits include over-voltage safeguards and a power-good signal. Continuous operation is rated beyond 100 000 hours MTBF.

How it compares

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

Price $72.99
Cheaper than about 78% of the 10,869 comparable items (median $142.99).
Max wattage 850 W
Typical for this category: the median of 930 items is 850 W.

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Specifications

Product
Brand nameDarkFlash
Product linePMT850
Model namePMT850
Part numberPMT850
Product colorBlack
Product typeATX
Graphics
SLI supportNo
CrossFire supportNo
Ports & slots
SATA power connectorsYes
Power
Max wattage850 W
Power efficiency> 90%
Modular cablingFull Modular
12V railsYes
Power good signalYes
Efficiency certification80 PLUS GOLD Certified
Overvoltage protectionYes
Supply voltage100–240 V
AC input frequency50/60 Hz
Rated input current10 A
Environment & compliance
Regulatory approvalsCE,ROSH,UL
More details
Fan configuration1 × 135 mm FDB Fan
Mean time between failures>100,000 h

Other versions of this model

5 more in the same range

Questions about this item

What graphics-card connector does the PMT850 include for PCIe 5.1 cards?

The unit ships with a native 12V-2x6 cable that can deliver up to 600W to RTX 30/40/50 series GPUs.

Will the PMT850 fit in an older ATX case that only has room for a 150 mm deep supply?

Yes, the compact 150 mm form factor matches the depth of most standard ATX cases and leaves space for cable routing.

How can I confirm the PMT850 is delivering stable power after installation?

The Power Good signal is active and the 135 mm FDB fan spins quietly under load, indicating normal operation.

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