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.
