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Black SFX power supply with fully modular cables, compact 125 mm length

FSP

FSP Dagger Pro SFX 850W power supply

SKU CH-WJ4K-7FPTQ

An 850 W SFX power supply with ATX 3.1 and PCIe 5.1 support, 80 PLUS Gold efficiency and fully modular cables for compact builds

  • Max wattage850 W
  • Power efficiency> 79%
  • Modular cablingYes
  • Power factor correctionActive
  • Main power connector20+4 Pin
  • PCIe power connectors1 × 6+2-Pin
  • ATX 3.1 and PCIe 5.1 ready with native 12VHPWR connector
  • Fully modular flat cables cut clutter and improve airflow in tight builds
  • 80 PLUS Gold efficiency over 90 % at typical load lowers heat and noise
  • Single +12V rail delivers full power to graphics cards without overload risk
  • Compact 125 mm SFX form factor fits Mini-ITX and Micro-ATX cases

Compact SFX 850 W unit for small-form-factor builds

This FSP Dagger Pro SFX 850W power supply fits Mini-ITX and Micro ATX chassis with its 125 mm length. It delivers 850 W through a single +12V rail and meets ATX 3.1 and PCIe 5.1 requirements. The fully modular design uses flat ribbon cables to keep airflow clear in tight spaces. 80 PLUS Gold certification means efficiency above 90 % at typical load.

Suits builders who need high wattage in an SFX

Buyers who want more storage connectors than five SATA ports should look elsewhere. Systems that require multiple PCIe 6+2-pin plugs for several graphics cards cannot be supported. The 110-120 V and 220-240 V input range covers standard mains worldwide. Cybenetics Standard+ noise rating indicates quiet operation.

Native 12VHPWR connector for ATX 3.1

The included 12VHPWR cable powers next-generation GPUs without an adapter. Two 24-pin ATX connectors and a single 6+2-pin PCIe plug complete the modular set. Active PFC and >79 % efficiency at low load round out the electrical specification. Made in Taiwan.

How it compares

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

Price $111.99
Cheaper than about 62% 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 nameFSP Group
Product line80 Plus
Part numberPPA8503901
Product colorBlack
Product typeATX 3.0 Compatible
Ports & slots
PCIe power connectors1 × 6+2-Pin
SATA power connectors5
Connection types2 × 24 pin ATX
Power
Max wattage850 W
Power efficiency> 79%
Modular cablingYes
Power factor correctionActive
Main power connector20+4 Pin
12V railsYes
Efficiency certification80 PLUS GOLD Certified
Supply voltage110–120 V/ 220–240 V
Rated power850 W
Compatibility
PSU length limit125 mm
Environment & compliance
PSU noise ratingCybenetics Standard +

Questions about this item

Will the 12VHPWR connector or cable need replacement down the line?

The native 12VHPWR connector is built to the ATX 3.1 and PCIe 5.1 specifications, so it is designed for the full product life without a scheduled swap.

What limit appears first when the 850 W unit runs at full load for hours?

The 80 PLUS Gold certification guarantees over 90 % efficiency at typical loads, so thermal limits are reached before the electrical rating is exceeded.

How loud and hot does the PSU get during all-day operation?

Cybenetics Standard + noise rating and over 90 % efficiency keep both fan noise and waste heat low even under continuous load.

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