Part Analysis
| General Data | |
| Manufacturer (OEM) | LiteOn |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 6x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | 2x NTC Thermistor & Relay |
| Bridge Rectifier(s) |
2x GBJ25V08 (800V, 25A @ with heatsink)
|
| APFC MOSFETs |
2x Infineon IPA60R060P7 (650V, 30A @ 100°C, Rds(on): 0.06Ohm)
|
| APFC Boost Diode |
2x WNSC5D (650V, 10A @ 125°C)
|
| Bulk Cap(s) |
2x TK (450V, 560uF each or 1120uF combined, 3000h @ 105°C, LGWA)
|
| Main Switchers |
2x Infineon IPA60R099P7 (600V, 20A @ 100°C, Rds(on): 0.099Ohm)
|
| APFC Controller |
LTA2021T
|
| Resonant Controller | LTA2021T |
| Topology |
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 6x DN4105 |
| 5V & 3.3V | DC-DC Converters: 2x |
| Filtering Capacitors | Electrolytic: 9x TK capacitor (105°C, LWY) Polymer: 29x |
| Synchronous Rectifier IC | MP6924 |
| Supervisor IC | Weltrend WT7527RT (OCP, OVP, SCP, PG) |
| Fan Model | Hong Hua (HA13525H12F-Z) (135mm, 12V, 0.5A, Fluid Dynamic Bearing Fan) |
| 5VSB Circuit | |
| Standby PWM Controller | Excelliance MOS EM8569D |
The purple heatsinks are eye-catching; I suspect they are made in-house since CM is in the heatsink manufacturing business. The platform’s design is nice, and despite the PSU’s high capacity and the normal-sized PCB, there is still plenty of space among the parts for good airflow. The main transformer looks like the ones used in 750W and 850W units, but thanks to its design, it can deliver way more power without issues. On the primary side, in addition to the APFC converter, two FETs arranged in a half-bridge topology chop the incoming signal to feed the main transformer, which powers the secondary side. An LLC resonant converter is also used to minimize switching losses. Six FETs handle the 12V rail on the secondary side, and two DC-DC converters generate the minor rails.
The soldering quality is impeccable, and the FETs Lite-On used are high-quality, especially on the primary side. I cannot say the same for the TK (Toshin Kogyo Co., Ltd.) caps, which might be Japanese on paper but are not up to the quality of other Japanese manufacturers (e.g., Chemi-Con and Rubycon). Besides electrolytic caps, many polymer ones handle ripple filtering on the secondary side.
CM preferred the standard cooling fan, a Hong Hua fan. So far, this brand has proved to be a reliable source of fans without breaking the bank, earning the trust of many manufacturers and brands.
I believe the images are not for this PSU in page 3, and instead are from the SeaSonic series. Notice the AC mains connector is using a different connector than the one in Page 2. Also, there is no “purple” anodized heatsinks, everything’s just black. Refer to the GX III 1050W review to see how it should look. Please fix this problem, thank you.
My bad, fixed. Thanks!
Excellent! Checking the review gallery now.
Also a big thanks for your exact component part number listings on page 2 of each variant of this PSU’s family (1250W, 1050W, 850W, 750W), it helped me a great lot to decide exactly which one of them to consider buying. Shame that Cooler Master doesn’t publish this information, but I always prefer to actually do a comparison between the internal components before considering to purchase a product, so as your review are an excellent source of information, thank you!