Power SuppliesReviews

FSP Dagger Pro 850W SFX PSU Review

Specifications:

Model SDA2-850
Rated Output Power 850W
Form Factor SFX
80 PLUS Certification Gold
Input Voltage 100-240V
Input Current 12-6A
Input Frequency 50-60Hz
Efficiency 90%
Fan Type ball-bearing fan, 92mm
Dimensions(L x W x H) 125 × 100 × 63.5 mm
Operation Temp. 200,000 Hrs
Protection OCP, OVP, SCP, OPP, OTP

Key Features:

  • Compliant with latest SFX12V V3.3
  • Efficiency ≧ 90% at typical load
  • MIA IC (Multiple Intelligence Ability) chipset inside
  • Semi-fanless design for silent operation
  • Quiet and long-lasting 92mm ball bearing fan
  • All black ribbon cables
  • Powerful single +12V rail design
  • Japanese electrolytic capacitors
  • Intel Latest CPU ready
  • Full protections OCP, OVP, SCP, OPP, OTP

 

The Dagger Pro SFX has exceptional specifications for so small PSU. A strong single +12V rail is the best choice for new computers and high-end graphics cards. The +12V rail is rated at 850W itself. Since the PSU is a high-efficiency unit, we expect it will handle two higher series graphics cards like a regular, large ATX unit.

 

AC/DC

AC Input 100-240Vac~  12-6A  50-60Hz (not for China)
200-240Vac~  6A  50-60Hz (Only for China)
DC Output +3.3V +5V +12V -12V +5Vsb
Max Output Current 20A 22A 70.83A 0.3A 3A
Max Combined Power 120W 850W 3.6W 15W
Total Power 850W

 

The efficiency is about as high as presented by FSP. Even if we are not going to use 800W+, these higher wattage units seem like a good idea to keep optimal voltages, low temperature, and low noise.

Considering the efficiency, I assume that the fan could spin faster at about 40% load, not 20%. It’s still quiet, but we can start to hear it once it passes 300W.

 

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