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Compact SFX power supply with matte black finish, 92 mm fan grille and fully modular cable sockets

FSP

FSP SDA2-650 650W SFX power supply

SKU CH-366Y-TBKD1 MPN SDA2-650

SFX form-factor unit delivers 650 W through a fully modular design with flat ribbon cables, 80 PLUS Gold efficiency above 90 % at typical load, a single +12 V rail.

  • Max wattage650 W
  • Power efficiency> 90%
  • Modular cablingFull Modular
  • Fan configuration1 × 92 mm
  • Power factor correctionActive
  • Main power connector24Pin

Model SFX 80+ Gold (650W)

  • Full modular design with flat cables simplifies builds in tight SFX cases
  • 80 PLUS Gold certification delivers 90% typical-load efficiency
  • Single +12V rail provides stable power for high-end graphics cards
  • 92 mm ball-bearing fan runs quietly while cooling the unit
  • Japanese electrolytic capacitors ensure long-term reliability

Compact 650 W SFX unit

The FSP Dagger Pro SDA2-650 is a 650 W SFX power supply built for small-form-factor builds. Its 125 mm length fits Mini-ITX and Micro-ATX cases, and the fully modular design with flat ribbon cables keeps the interior tidy. A 92 mm ball-bearing fan and 100 % Japanese electrolytic capacitors support reliable operation. The single +12 V rail delivers the full 650 W to the graphics card without splitting current across multiple rails.

Suited for tight builds.

This unit targets builders assembling compact gaming rigs or living-room PCs where space is at a premium. The two 6+2-pin PCIe connectors handle a single modern graphics card, while the single SATA power connector limits storage expansion. Systems that require several drives or a second graphics card should look at a power supply with more peripheral connectors and higher total wattage.

650 W on a single +12 V rail

The defining specification is the 650 W capacity delivered through one +12 V rail, which determines whether the unit can power a chosen graphics card and CPU combination in a small chassis. Builder must verify that the GPU power draw and the case SFX clearance match this rating before purchasing.

How it compares

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

Price $106.99
Cheaper than about 64% of the 10,869 comparable items (median $142.99).
Max wattage 650 W
Lower than about 70% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameFSP Group
Product lineDagger Pro Series
Model nameSDA2-650
Product typeATX 12 V
Graphics
SLI supportYes
CrossFire supportCertified
Ports & slots
PCIe power connectors2 × 6+2-Pin
SATA power connectors1
Power
Max wattage650 W
Power efficiency> 90%
Modular cablingFull Modular
Power factor correctionActive
Main power connector24Pin
12V railsSingle
Efficiency certification80 PLUS GOLD Certified
Overvoltage protectionYes
Overload protectionYes
Supply voltage110–240 V
AC input frequency50/60 Hz
Size & build
Product dimensions125 × 63.5 × 110 mm (4.92 in × 2.5 in × 4.33 in)
Product weight1.182kg (2.61 lb)
Shipping weight1.70 kg
Package size241 × 184 × 108 mm
Compatibility
Haswell compatibilityYes
PSU length limit125 mm
More details
Fan configuration1 × 92 mm
Mean time between failures>100,000 h

Other versions of this model

1 more in the same range

Questions about this item

How can I verify the 80 PLUS Gold certification is active after installing the SDA2-650?

The PSU meets the 80 PLUS Gold standard with efficiency greater than 90 percent at typical load. You can confirm operation by monitoring system stability and power draw under load using software tools or a hardware meter.

Which cables and connectors come with the FSP SDA2-650 and what must I source separately?

The fully modular unit includes flat ribbon cables for the 24-pin main connector, two 6+2-pin PCIe connectors and one SATA power connector. Any additional SATA or peripheral cables required for extra drives must be purchased separately.

Which version of the Dagger Pro series should I choose for a 650 watt SFX build?

The SDA2-650 is the 650 watt model in the Dagger Pro lineup. It delivers 650 W from a single +12 V rail in an SFX form factor 125 mm long, certified to 80 PLUS Gold with a 92 mm ball-bearing fan.

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