FSP Hydro G Pro 1000W Report (Page 3 of 4)

Page 3 - Physical Look - Inside

As always, we opened up our FSP Hydro G Pro 1000W power supply to take a detailed look at what is going on inside. Please note that doing this at home will void your 10-year warranty, thanks to the warranty seal FSP applied over one of the attachment screws. It is great it comes with a 10-year warranty, which is much longer than past FSP models and is becoming the industry standard for performance PSUs. For the benefit of you, we cracked ours open, so you do not need to. There are no user serviceable parts inside.

Opening the FSP Hydro G Pro 1000W is quite straightforward with the removal of four screws. Taking out the internal components from the enclosure requires the removal of eight more. Our photo above shows an overhead view of its internal components. Its OEM is, unsurprisingly, FSP themselves. One highlight of the FSP Hydro G Pro is the interior is coated for reliable operation in up to 95% relative humidity conditions. It features an LLC half bridge topology with DC-to-DC converters. At first glance, the build quality appears to be excellent. There are three main heatsinks inside and almost no wires. A big and small heatsink are located on the primary side, both of which are painted black. One other black colored heatsink can be found down the line with two integrated circuits attached to it.

Pulling the enclosure apart and we got straight to the internal inspection. The transient filter stage is the first input stage of a computer power supply, so we will take a look at that first. FSP has always done a great job in the past to make sure their power supplies met or exceeded the recommended requirements, and the FSP Hydro G Pro 1000W is no exception. The FSP Hydro G Pro 1000W has one metal oxide varistor, two metalized polyester X-capacitors, four ceramic Y-capacitors, and two common mode chokes. This is two times the amount of X and Y capacitors than recommended. Considering some modern day PSUs have missing MOVs, I am happy to see it here as this component is used to stabilize spikes from the AC line.

The active PFC circuit featured on the FSP Hydro G Pro 1000W uses two Diodes Incorporated GBJ2506 bridge rectifiers on both sides of the first heatsink. At 115V, the maximum rectified forward current capacity with heatsink is 25A each, so you can theoretically pull up to 5750W (25A * 2 diodes * 115V) from the bridge rectifier at 100% efficiency. Of course, this is limited by the fact that it is not 100% efficient and also neglects the fact that not every component in the system is able to keep up. Further down the line, on the outside of the largest heatsink, we can see two Infineon IPW60R120P7 power transistors. Each is certified for up to 16A at 100c. These transistors present a maximum resistance of 120 mΩ when turned on according to the manufacturer's data sheet. This on characteristic is 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. A Cree C3D08060A Schottky diode is placed right next it. A Chino-Excel Technology CEF04N7G N-channel enhancement mode field effect transistor is found on the opposite side of the same heatsink in the Hydro G Pro 1000W power supply as well.

On the primary side, we can see one Japanese brand Nippon Chemi-Con capacitor. 100% Japanese brand capacitors are specified on the marketing material, so this is to be expected. Our 1000W version of FSP's latest Hydro series power supply incorporates one 680µF x 450V capacitor. It is rated at 105c; whereas more value-oriented power supplies usually use 85c rated capacitors.

The smaller heatsink shown in the photo above has two STMicroelectronics STF33N60M2 power MOSFETs attached to it. Each is certified for up to 16A at 100c. These transistors present a maximum resistance of 125 mΩ and typical resistance of 108 mΩ when turned on according to the manufacturer's data sheet.

On the secondary side, we can see more Japanese brand capacitors from Nippon Chemi-Con and Rubycon rated at 105c. 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. Six Toshiba TPH1R306PL MOSFETs are responsible for generating the +12V output, located at the back of the PCB for additional cooling, shown in the second photo. The TPH1R306PL's rated continuous drain current is 100A at 25c. It has an RDS(on) value of 1.34 mΩ maximum and 1.0 mΩ typical at 10V. The +5V and +3.3V outputs are generated by six Diodes Incorporated DMN3009SK3 MOSFETs on an add-in board, shown in the first photo. Each is certified for up to 20A at 25c. These transistors present a maximum resistance of 5.5 mΩ and typical resistance of 2.5 mΩ at 10V when turned on according to the manufacturer's data sheet. Champion's CM6901 is the switching controller. ANPEC's APW7159 is the synchronous buck PWM controller. Meanwhile, a Weltrend WT7527 monitoring IC provides over/under current and over/under voltage 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. All modular sockets at the bottom are soldered directly to the main PCB after the secondary stage. Pin headers join the mainboard and daughterboard to reduce power transmission loss. The output connector configuration can be seen on the previous page. Overall, the internal build quality of FSP's Hydro G Pro 1000W power supply is good -- something we would expect from an FSP-built unit. Components are arranged very well for optimal cooling with almost no wires running around inside, and solder points on its black/green PCB is quite clean in general. I would say the FSP Hydro G Pro 1000W is generally excellent with regards to the selection of components used under the hood.

Lastly, we see a 120mm fan that provides cooling to the FSP Hydro G Pro 1000W's internal components. It is connected to an add-in board using a 2-pin connector. A 120mm fan is rather small nowadays for a power supply with a bottom mounted fan, but if not a lot of heat is being generated, it should not be much of an issue. A 120mm fan is used to keep the enclosure as small as possible. Protechnic Electric is the fan OEM with MGA12012XF-O25 as the model number, as shown in our photo above. Further research indicates the MGA12012XF-O25 is a fluid dynamic bearing fan specified at 96.20 CFM, 5.51mmH2O, 40.6 dB(A), and 0.52A for a maximum speed of 2700 RPM.

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