Cougar GEX X2 850W PSU Review

Part Analysis

General Data
Manufacturer (OEM) XHY-Power
PCB Type Double Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x Mov
Inrush Protection NTC Thermistor MF72 5D15 & Relay HF46F-G
Bridge Rectifier(s)
2x GBU15J (600V, 15A @ 100°C)
2x Ncepower NCE65TF130 (650V, 28A @ 100°C, Rds(on): 140mOhm)
APFC Boost Diode
1x DS065006C3
Bulk Cap(s)
1x TK (420V, 680uF, 2000h @ 105°C, LGW)
Main Switchers
4x CS13N50FA9R (500V, 8.5A @ 100°C, Rds(on): 0.5Ohm)
APFC Controller
Champion CM6500UNX
Resonant Controller Champion CM6901T6
Primary side: APFC, Full-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs 4x CRSM016N06L2 (60V, 136A @ 100°C, Rds(on): 2.4mOhm)
5V & 3.3V DC-DC Converters: 6x Excelliance MOS EMB07N03H  (20V, 35A @ 100°C, Rds(on): 7mOhm)
PWM Controller(s): uPI-Semi uP3861P
Filtering Capacitors Electrolytic: 9x Nippon
Chemi-Con (4-10,000h @ 105°C, KY),
3x Nichicon (2-8,000h @ 105°C),
2x PLH,
Polymer: 21x FPCAP
Supervisor IC Infino IN1S424I (OCP, OVP, UVP, SCP, PG)
Fan Model DWPH EFH-12E12H (120mm, 12V, 0.5A, Hydraulic Dynamic Bearing Fan)
5VSB Circuit
1x HM69-60R10 SBR (42V, 22A)
Standby PWM Controller Excelliance MOS EM8569C

The OEM is XHY or Fusion Power. This is a good OEM, but its name isn’t widespread since it primarily works behind the scenes. The PCB is small and similar to the 1000W model; I don’t like the look of the non-straight pair of heatsinks. Because of the limited space, there isn’t much space between parts for increased airflow, which is why large heatsinks are used. The soldering quality is good on the main PCB but not that great on the PCB hosting the AC receptacle and the first part of the transient filtering stage.

It is good to see enough thermal paste used on the FETs, to have better contact with the heatsinks. The design uses a full-bridge topology and an LLC resonant converter on the primary side. On the secondary side, a synchronous rectification scheme is used for 12V, and the minor rails are generated through a pair of DC-DC converters. The quality of the bulk cap is not at the same level as the Thermaltake GF3 and Montech Titan Gold units, with similar capacity. The same goes for the cooling fan, which might use a Hydraulic Dynamic Bearing but is from a lesser-known OEM.

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