Corsair CX450 PSU Review: Two Flavors, Tested and Compared

Teardown & Component Analysis

Before reading this page we strongly encourage you to a look at our PSUs 101 article, which provides valuable information about PSUs and their operation, allowing you to better understand the components we're about to discuss.

CX450 - Great Wall

General Data
Manufacturer (OEM)Great Wall
Platform ModelGW-ATX450BL
Primary Side
Transient Filter4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush ProtectionNTC thermistor
Bridge RectifierGBU1508 (800V, 15A @ 100°C)
APFC MOSFETs2x ROHM R6020ANX (600V, 9.7A @ 100°C, 0.22Ω)
APFC Boost DiodeSTi STTH8S06FP (600V, 8A @ 150°C)
Hold-up Cap1x Nippon Chemi-Con (450V, 220uF, 2-3000h @ 105°C, KMM)
Main Switchers2x Jilin Sino-Microelectronics JCS18N50H (500V, 11A @ 100°C, 0.27Ω)
APFC ControllerChampion CM6500UNX & CM03X Green PFC controller
Resonant ControllerChampion CM6901
TopologyPrimary side: Half-bridge & LLC resonant controller
Secondary side: Synchronous rectification & DC-DC converters
Secondary Side
+12V MOSFETs2x Silan Microelectronics SVD3205T (55V, 80A @ 25°C, 8mΩ)
5V & 3.3VDC-DC Converters: 6x A-Power AP0403GH (30V, 50A @ 100°C, 4.5mΩ)
PWM Controller: APW7159C
Filtering CapacitorsElectrolytics: Elite EJ (3-5000h @ 105°C), ED (2-5000h @ 105°C), EK (2-5000h @ 105°C), 1x Teapo (3-6000h @ 105°C, SY), 1x Rubycon (105°C)
Polymers: Nichicon (LF)
Supervisor ICSitronix/Infinno ST9S429-PG14 (OCP, OVP, UVP, SCP, PG)
Fan ModelYate Loon D12SM-12 (120mm, 12V, 0.30A, 1700 RPM, 72CFM, 34 dB(A), sleeve bearing)
5VSB Circuit
RectifierA-Power AP04N60H-HF (600V, 2.2A @ 100°C, 2.5Ω)
Standby PWM ControllerSI8016HSP8

   

CX450 - CWT

General Data
Manufacturer (OEM)Channel Well Technology
Platform ModelCustom
Primary Side
Transient Filter4x Y caps, 3x X caps, 2x CM chokes, 1x MOV
Inrush ProtectionNTC thermistor
Bridge Rectifier1x
APFC MOSFETs2x Silan Microelectronics SVF13N50F (500V, 10A @ 100°C, 0.52Ω)
APFC Boost DiodeSTi STTH8S06FP (600V, 8A @ 150°C)
Hold-up Cap1x Nippon Chemi-Con (450V, 180uF, 2000h @ 105°C, KMR)
Main Switchers2x Silan Microelectronics SVF13N50F (500V, 10A @ 100°C, 0.52Ω)
APFC ControllerInfineon ICE3PCS01G - CM03X
Resonant ControllerInfineon ICE2HS01G
TopologyPrimary side: Half-bridge & LLC resonant controller
Secondary side: Synchronous rectification & DC-DC converters
Secondary Side
+12V MOSFETs4x
5V & 3.3VDC-DC Converters: 2x Ubiq QM3016D (30V, 68A @ 100°C, 4mΩ), 2x Ubiq QM3006D (30V, 57A @ 100°C, 5.5mΩ)
PWM Controller: APW7159C
Filtering CapacitorsElectrolytics: Elite ED (2-5000h @ 105°C), 1x Chemi-Con (4-10,000h @ 105°C, KY)
Polymers: Elite (RP, RH, GT), Apaq
Supervisor ICWeltrend WT7502 (OVP, UVP, SCP, PG)
Fan ModelHong Hua HA1225M12F-Z (120mm, 12V, 0.45A, 2050 RPM, fluid dynamic bearing)
5VSB Circuit
RectifiersCET CEF04N7G (700V, 4A, 3.3Ω), Vishay SBL1040CT (40V, 10A)
Standby PWM ControllerOn-Bright OB5269

Video - Part Analysis

Both versions of the CX450 employ modern platforms featuring LLC resonant converters and voltage regulation modules for generating the minor rails. In such low-efficiency PSUs, the use of LLC resonant converters appears to be overkill. But they still represent an advantage over older designs, since those converters facilitate higher efficiency under light loads.

Both configurations have Elite brand electrolytic capacitors. We're not particularly fond of Elite caps, but it's hard to be picky in this price range. CWT's design uses fewer electrolytic caps and more polymer ones, which are resilient against tough ambient conditions. Moreover, the CWT-based CX450 uses a higher-quality fan with a fluid dynamic bearing. On the other hand, Great Wall's version of the CX450 utilizes a more sophisticated supervisor integrated circuit. It also boasts better soldering quality than CWT's platform.

In general, both PSUs represent good build quality. The CWT version boasts a better fan and more polymer caps, while the Great Wall model has an advantage in its soldering quality and larger bulk capacitor. In terms of design, the Great Wall platform looks cleaner. However, the CWT version uses a higher number of FETs for regulating the +12V rail, reducing thermal load on the secondary side.

The following video shows the CX450’s internals. (We disassembled both configurations.)

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