FSP Dagger Pro 650W (Page 3 of 4) | Reports

Page 3 - Physical Look - Inside

As always, we opened up our FSP Dagger Pro 650W power supply to take a detailed look at what is going on inside. Please note that while doing this at home may not necessarily void your seven-year warranty as there is no warranty seal on any of the screws, there are no user serviceable parts inside and opening it up may pose actual danger to the end user. But for the benefit of you readers, we cracked ours open so you do not need to. Disassembling the FSP Dagger Pro 650W is quite straightforward with the removal of ten screws. The Dagger Pro 650W is designed and made by FSP themselves, which is unsurprising since the company is a large PSU OEM for many other brands too. Our photo above shows an overhead view of its internal components. At first glance, the build quality appears to be improved from its predecessor, as we see much less extra cabling inside the unit. It is not the best we have seen, but it is definitely improved. There are two main heatsinks inside with all the components crowded into this small space.

The transient filter stage is the input stage of any computer power supply, so we will take a closer look at this first. From here, there are two ferrite coils and a metal-oxide varistor. A single X-capacitor and two Y-capacitors are placed at the AC receptacle, while another X-capacitor and two Y-capacitors are found on the main board. In total, this is twice the required X- and Y-capacitors recommended, which is good to see.

Close by, on the primary side, there is a single Nippon Chemi-Con capacitor rated at 330uF at 420V. It has a temperature rating of 105c. Japanese main capacitors being present here like Nippon-Chemi Con or Rubycon is great to see, especially as they generally offer better reliability. Similarly, this main capacitor keeps the higher temperature rating, unlike budget power supplies with primary capacitors rated at a lower 85c temperature. Other major electrolytic capacitors around this board are also Rubycon and Nippon Chemi-Con branded capacitors, living up the feature of 100% Japanese-made electrolytic capacitors.

Continuing on, the FSP Dagger Pro 650W uses one GBU1506U rectifying bridge. This supports up to 15A of current at 100C. At 115V, the theoretical power you can pull from the bridge rectifier is 3450W at 100% efficiency. Of course, this is purely from the bridge rectifier, and not all components in the power supply can actually hold this workload. Even so, this is well above the necessary requirements for a 650W power supply. The active PFC circuit in the FSP Dagger Pro 650W is located on a silver heatsink near the primary capacitor. The active PFC circuitry is handled by two ROHM Semiconductor R6030KNX. This transistor is rated to deliver 30A at 100 degrees Celsius continuously with a typical resistance of 0.26 ohm. A single Infineon SPA17N80C3 switcher can also be found with a drain to source voltage of 800V, continuous drain current of 11A at 100 degrees Celsius continuously with a maximum resistance of 0.29 ohm. These on characteristics are called Static Drain-Source On-Resistance or commonly abbreviated as RDS(on). The more efficient the component is, the lower the RDS(on) value, since it wastes less power with lower resistance. Two more Infineon IDD06GSG60C boost diodes are also found in the active PFC circuitry. Finally, the APFC and switching logic seems to be controlled by a proprietary FSP 6600 IC.

As for the secondary side, there are a few more of the aforementioned electrolytic capacitors, but the polymer capacitors are Teapo ones. As with modern high efficiency power supplies, all rectifiers produce the +12V out -- while the +5V and +3.3V outputs are generated from the +12V output using a DC to DC converter within the power supply unit. As such, the secondary side shows some various components. The +12V MOSFETs are two Infineon IPP023NE7N3 with a continuous drain current of 120A at 100c and a drain source voltage of 75V. The +5V and +3.3V converters consist of four Infineon BSC0902NS with a continuous drain current of 67A at 100c and a drain source voltage of 30V. This is controlled by an ANPEC APW7159C found on the same daughterboard on the secondary side. Finally, a SITI PS113A monitoring IC can be found to provide OVP, UVP, and SCP protection. The datasheets for all components mentioned in this review can be found on their respective manufacturers' websites.

At the back, we have a large daughterboard covering the entire rear panel for the modular cable sockets. There is nothing special going on here electrically other than a few more Teapo polymer filtering capacitors. The output connector configuration can be seen on the previous page. Overall, the internal build quality of FSP Dagger's 600W power supply is good. Components are tightly packed given the limited amount of space available, and soldering points on its PCB is done to a good quality standard. Component selection is also pretty good given the limited physical size and wattage capacity of 650W.

Lastly, we see an 92mm fan that provides cooling to the FSP Dagger Pro 650W's internal components. It is connected to an add-in board using a 2-pin connector. This is an upgrade from the smaller 80mm fan we sometimes see on other SFX units, which is great to see. Furthermore, the FSP Dagger Pro 650W is a semi-passive power supply, so this fan may not necessarily be spinning all the time. Power Logic is the fan OEM, with PLA09215B12H as the model number, as shown in our photo above. Further research indicates this is a dual ball bearing fan specified at 0.55A. Ball bearing fans are very reliable at the expense of noise.


Page Index
1. Introduction, Packaging, Specifications
2. Physical Look - Outside
3. Physical Look - Inside
4. Minor Tests and Conclusion