Page 3 - Physical Look - Inside
In order to further investigate the design details of the SilverStone Strider Platinum ST1000-PTS 1000W power supply unit, some panel removal is required. It is important to note two important concerns before disassembling any power supply unit. First, certain components, such as the capacitors, may cause an electrical shock if handled improperly; and second, your five-year warranty will be voided if the screws on the power supply unit are removed. Therefore, unnecessary disassembling of a power supply unit should be avoided. Once the top panel of the ST1000-PTS is removed, a closer look of the electronic components can be conducted. The OEM for this power supply is Enhance Electronics.
Let us first take a look at the transient filter stage of this power supply unit. The function of the transient filter stage is to protect the computer from the power grid noise and voltage spikes. In the ST1000-PTS 1000W power supply unit, the transient filter stage contains three X-capacitors, six Y-capacitors, two ferrite coils, and one metal oxide varistor. The MOV here is to prevent the computer from being damaged by lightning surges. It is worth mentioning not all the power supply units in the market have an MOV. There are two sets of X-capacitors and Y-capacitors, with one set behind the power plug and the other set found in the corner of main PCB board.
Now, we move on to the primary side. The two big capacitors in the photo are Nippon Chemi-Con capacitors, which are rated at 560uF x 450V each. The temperature is rated at 105c, which is the standard in terms of durability. They are Japanese-made capacitors; therefore, it comes at a higher cost than capacitors from elsewhere in Asia, but the quality is generally the best. For the standby 5V PWM control, there is an ATK AT6002H chip.
In the above photo, we can see there is a big heatsink behind the two capacitors. There is a rectifying bridge attached to that heatsink. From what I can see, the rectifying bridge is a Willas RS2505M-U1. At 115V, the maximum rectified forward current capacity with heatsink is 25A, so you can theoretically pull up to 2875W (25A * 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 are able to keep up. For the active PFC control, there is an ATK AT6101Z IC and a Champion CM03X Green PFC controller. Note the PFC control board is located right between the pair of big Chemi-Con capacitors and the large unpainted heatsink, which features no clear line-of-sight. For the rest of the active PFC circuits, you can find four Infineon IPP50R140CP MOSFETS and two Cree C3D08060A boost diodes attached to the bigger heatsink. Specifically, each Infineon IPP50R140CP has 0.14ohm drain-source on-resistance, and it can deliver up to 15A at 100 degrees Celsius continuously. Note the lower the drain-source on-resistance, the more efficient the transistor will be.
The capacitors on the secondary side are from Japanese companies such as Nippon Chemi-Con, Rubycon, Unicon, and Suncon, and they are rated at 105c. There are also some Chinese-made CapXon capacitors, making the Strider Platinum ST1000-PTS 1000W not a PSU with 100% Japanese capacitors. For a modern power supply unit, the power output from the rectifiers is +12V generated by eight Infineon OptiMOS BSC014N04LS power MOSFETs. Each Infineon BSC014N04LS has 0.0014 ohm drain-source on-resistance, and it can deliver up to 100A at 100 degrees Celsius continuously. The +12V output of the power supply unit can just directly use the power from the rectifiers; however, the +5V and +3.3V outputs are converted from the +12V output. The conversion functionality is mainly realized by the components on the DC to DC daughterboard, where you can find an ANPEC APW7160A synchronous buck PWM controller and four Infineon BSC018NE2LS handling the +5V and +3.3V outputs. Each Infineon BSC018NE2LS has 0.0018 ohm drain-source on-resistance, and it can deliver up to 97A at 100 degrees Celsius continuously. More information about these parts can be found from their respective datasheets from the manufacturer's website.
The modular cable sockets are soldered onto another daughterboard at the rear of the power supply unit. Having good soldering quality of those sockets is very important, since a significant amount of force will be applied on them when plugging or unplugging the connectors. The sockets in the SilverStone Strider Platinum ST1000-PTS 1000W have very good soldering quality, and I am sure that they can handle some abuse with no problem. In the above photo, you can see a smaller board behind the sockets' daughterboard to hold the Silicon Touch PS223 protection IC.
In terms of cooling performance, there are two things we need to pay attention to for a power supply unit; namely the heatsink and cooling fan. In this case, we can see multiple heatsinks and one cooling fan inside the SilverStone Strider Platinum ST1000-PTS 1000W. The layout of heatsinks inside the power supply unit is well-thought out to fit into such relatively tiny chassis for a thousand-watt PSU. The size of the fan is 120mm in diameter, which is the maximum the enclosure can accommodate. According to the label on the fan, the D12SH-12 from the Yate Loon uses enhanced sleeve bearings of which they refer to as HYB to keep noise and durability in check.
1. Introduction, Packaging, Specifications
2. Physical Look - Outside
3. Physical Look - Inside
4. Minor Tests and Conclusion