NZXT C1200 ATX v3.1 PSU Review

Part Analysis

General Data
Manufacturer (OEM) CWT
Platform CXT
PCB Type Double-Sided
Primary Side
Transient Filter 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush Protection 1x NTC Thermistor SCK207R0 (7Ω @ 25°C) & Relay
Bridge Rectifier(s)
2x WeEn WNB2560M (600V, 25A @ 127°C)
APFC MOSFETs

3x Infineon IPA60R099P6 (650V, 24A @ 100°C, Rds(on): 0.99Ohm)

APFC Boost Diode
1x On Semi FFSP1665A (650V, 16A @ 135°C)
Bulk Cap(s)
2x Rubycon (420V, 680uF each or 1360uF combined, 2000h @ 105°C, MXE)
Main Switchers
2x Infineon IPA60R099P6 (650V, 24A @ 100°C, Rds(on): 0.99Ohm)

APFC Controller

Champion CM6500UNX &
CM03X (for no load consumption)

Resonant Controller

Champion CM6901

Topology
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side
+12V MOSFETs 10x Infineon BSC014N04LS (40V, 125A @ 100°C, Rds(on): 1.4mOhm)
5V & 3.3V DC-DC Converters: 2x QM3054M6 (30V, 61A @ 100°C, Rds(on): 4.8mOhm) &
2x QN3107M6N  (30V, 74A @ 100°C, Rds(on): 2.6mOhm)
PWM Controller(s): uP3861P
Filtering Capacitors Electrolytic:
4x Nippon Chemi-Con (W)
3x Rubycon (4-10,000 @ 105°C, YXF)
Polymer: 31x FPCAPS, 1x Nippon Chemi-Con
Supervisor IC Weltrend WT7502 (OVD, UVD, PGO, )
Fan Model Hong Hua (HA13525H12SF-Z) (135mm, 12V, 0.5A Fluid Dynamic Bearing Fan)
5VSB
TVS Diode P6SMB
Rectifier
Pingwey R1MF
Synchronous Rectification Driver
Leadtrend LD8926AA1
Standby PWM Controller On-Bright OB2365T

While the C1500 uses the more advanced and semi-digital CTT platform, the lower-capacity members of the same line use the analog CXT platform. The design is contemporary, with a half-bridge topology on the primary side and an LLC resonant converter. On the secondary side, a synchronous scheme rectifies the 12V rail through ten Infineon FETs, and a pair of DC-DC converters generate the minor rails.

All parts are of high quality, and the soldering quality is also good. The cooling fan is by Hong Hua, which dominates the PSU market because of its fair prices, good quality, and performance. The fan uses a fluid dynamic bearing for lower noise and increased longevity.

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5 thoughts on “NZXT C1200 ATX v3.1 PSU Review

  1. Thought I would share my findings.
    Firstly thank you crmaris for the good review based on this I decided to get the NZXT C1200, retiring my Corsair AX1200 (it’s now more than 10 years old). I found that I am using less power now, around 0.5Amps or 115 Watt (@ 230V) less power now, I tested playing the same game for the same period and logging with my Fluke 367FC. I did find that the inrush current is a bit higher at 5.2A, vs the 4.7A my corsair had. But overall super happy.

  2. The difference between the original C1200 and ATX 3.1 version is not just limited to the 12V-2×6 connector. The new version also has one extra PCIe connector, which is good if you have a GPU with three PCIe connectors like the 7900 XTX from AIBs.

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