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Teardown & Component Analysis
Before proceeding with 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. Our main tools for disassembling PSUs are a Thermaltronics soldering and rework station and a Hakko FR-300 desoldering gun. Finally, for the identification of tiny parts we use an Andonstar HDMI digital microscope.
| General Data | |
|---|---|
| Manufacturer (OEM) | CWT |
| Platform Model | - |
| Primary Side | |
| Transient Filter | 6x Y caps, 2x X caps, 2x CM chokes, 1x MOV |
| Inrush Protection | NTC Thermistor |
| Bridge Rectifier(s) | 2x GBJ1510 (700V, 15A @ 100°C) |
| APFC MOSFETs | 2x Vishay SiHF22N60E (650V, 13A @ 100°C, 0.18Ω) |
| APFC Boost Diode | 1x Power Integrations QH08TZ600 (600V, 8A @ 150°C) |
| Hold-up Cap(s) | 2x Nichicon (400V, 470uF each or 940uF combined, 2000h @ 105°C, GG) |
| Main Switchers | 2x Vishay SiHG20N50C (560V, 11A @ 100°C, 0.27Ω) |
| APFC Controller | Infineon ICE3PCS01G - CM03X |
| Switching Controller | Infineon ICE2HS01G |
| Topology | Primary side: Half-Bridge & LLC Resonant Controller Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | 6x International Rectifier IRFH7004TRPBF (40V, 164A @ 100°C, 1.4 mΩ) |
| 5V & 3.3V | DC-DC Converters: 4x QM3004D (30V, 40A @ 100°C, 8.5 mΩ) 2x QM3006D (30V, 57A @ 100°C, 5.5 mΩ) PWM Controller: Anpec APW7159 |
| Filtering Capacitors | Electrolytics: Nippon Chemi-Con (1-5000h @ 105°C, KZE), Nippon Chemi-Con (4-10,000h @ 105°C, KY), Nippon Chemi-Con (5-6000h @ 105°C, KZH) Polymers: FPCAP |
| Supervisor IC | Weltrend WT7502 (OVP, UVP, SCP, PG), LM358 |
| Fan Model | NR135L (12V, 0.22A, Rifle Bearing) |
| 5VSB Circuit | |
| Rectifier | SD04N65A FET, QM3004D FET, MBRU2045CT SBR (45V, 20A @ 125°C) |
| Standby PWM Controller | On-Bright OB5269CP |
This is the same CWT platform found in all RMx PSUs, including the black RM850x. A half-bridge topology is used on the primary side, along with an LLC resonant converter. On the secondary side, a pair of DC-DC converters generate the minor rails. The +12V rail is generated through six FETs installed on two vertical boards with no heat sinks attached on them. Besides transferring power to the main PCB, a small number of bus bars also cool the +12V FETs.
Corsair's capacitor selection is typical for a good PSU. We find Nippon Chemi-Con KZE and KY electrolytic caps, along with some KZH and a number of Japanese polymer caps provided by FPCAP (Functional Polymer Aluminum Solid Electrolytic Capacitors).
The rifle bearing-based cooling fan spins slowly, so it won't be heard even under stressful conditions.
Finally, the build quality is excellent. An excess of white glue is there to make sure you won't hear any coil whine. It might not look good, but it's surprisingly functional. Since power supplies are rarely opened up, most users won't even know it's there.
The following footage shows the RM850x White's internals.
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