FSP DAGGER PRO ATX 3.1 850W 80 PLUS Gold SFX Fully Modular PSU

850W at 80 PLUS Gold in a standard SFX body, with a native 12V-2x6 connector. The DAGGER PRO ATX 3.1 850W is one of the highest wattage true SFX supplies available, which makes it the piece that lets a small form factor build run a full size high end graphics card.

Key specifications

• Continuous output: 850W
• Efficiency: 80 PLUS Gold
• Standards: ATX12V V3.1 and SFX12V V4.0
• GPU power: native 12V-2x6
• Cabling: fully modular
• Fan: 92mm ball bearing, semi fanless at low load
• Form factor: SFX, not SFX-L
• Warranty: 10 years
• Model: SDA2-850 GEN5

SFX, not SFX-L

This is the shorter standard SFX body, so it fits every SFX bracket and also drops into an ATX case with the usual adapter plate. SFX-L units are 30mm longer and will not fit some of the tightest ITX chassis. Getting 850W out of the smaller body is the point of this unit.

Revision warning: Three generations of SDA2-850 exist and retailer listings mix them freely. Only the ATX 3.1 unit described here has the 12V-2x6 connector. The older revisions have the 12+4 pin 12VHPWR or no 16 pin connector at all.

Also note: A 92mm fan in a small body means it becomes audible sooner than a 120mm ATX unit under sustained heavy load. That is the price of the form factor, not a fault.

In the box: PSU, modular cable set including 12V-2x6, mains lead, mounting screws