Disassembly
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The input filtering consists of two X-Capacitors, two coils, four Y-Capacitors (two of which are soldered to the AC receptacle) and one MOV. This is the same number of components as used on its 80plus bronze cousin, and is more than enough for the job. The primary side is driven by a Champion Micro CM6802 PFC/PWM controller IC. It drives four STF18NM60N MOSFETs – two as PFC transistors and two as switching transistors. They are rated for 13A at 25°C and 8.2A at 100°C.
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The secondary side capacitors are all made by Teapo. They aren’t as bad as the likes of Fuhjyyu and can hold up OK if given good cooling. Unfortunately, though, some of them are a little too close for comfort to hot components, such as the 5vsb rectifier, and the main toroid coil. We would prefer that they either be placed further away from these components, or for Japanese capacitors to be used instead.
The 12V output uses synchronous rectification, where transistors are used as opposed to diodes. The parts used are two Alpha and Omega Semiconductors AOTF266L MOSFETs, which are rated for 78A each at 25°C and 55A at 100°C, so the 12V rails would be capable of over 100A combined at a realistic temperature, although some of this has to be shared with the other rails, since they use DC-DC conversion. The conversion circuits use an EM5301 Buck Controller and STD85N3LH5 MOSFETs rated at 80A each at 25°C and 55A at 100°C – Easily good enough for 16A rails. The secondary controller IC is a Weltrend WT7525-140. It supports Over Current Protection on two 12V rails.
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The soldering is not as tidy as we’re used to from In Win. A few of the joints around the DC-DC VRMs have a little more solder than necessary, and there is some flux left on the PCB. However, it is not serious enough to cause any issues, and I don’t even think it is worth knocking half a point off for.
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The fan is made by ADDA, like on all of the other In Win products I have reviewed. This time, however, it uses ADDA’s Hypro bearing – a modified sleeve bearing with an additional oil chamber – as opposed to a plain sleeve bearing. These types of bearings are quieter than ball bearings, and theoretically more reliable than plain sleeve bearings. During test 1, it spun so slowly that I could still see the blades and was extremely quiet. It first became audible at around 200W load, and was never loud enough to be disturbing. The primary heat sink is very large, and has lots of surface to air contact. The secondary heat sink, on the other hand, is tiny. This product could have been made even quieter if a larger heat sink was used.
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