If you're posting a thread like this, then you should be posting traces of output performance - turn on / off and load change transient behaviour, ripple and noise etc.
A few oversized internal photos really don't tell you anything much (apart from grounding) about the desirability of the supply for actual use.
It can tell you how well they have use RFI and other filters and capacitors, grounding, etc. though. Of course, the end result is a scope. I don't have a scope so I can't measure the output power cleanliness and efficiency of the unit. I was just wondering if even the unit is electronically or mechanically sound. I only saw one coil choke on it, for instance.
Unfortunately not. A really detailed analysis of the PCB layout (and schematic) might give a clue, but the effort would be considerable, for an experienced designer, and you wouldn't really have confidence in this without actual measurements. It depends on things like the internal construction quality of the magnetics etc, which are invisible.
Just wondering because when I read computer power supply reviews, where they do fully test the units using a scope, hot boxes, and at various loads, they always do a run down about what the board looks like, separation of mains , rectifier usage, filters, what brand caps they use and how many , soldering job, OCP protections, etc. ex:
COMPONENT ANALYSIS
General Data -
Manufacturer (OEM) CWT
PCB Type Double Sided
Primary Side- Transient Filter: 4x Y caps, 2x X caps, 2x CM chokes, 1x MOV
Inrush Protection: NTC Thermistor SCK-037 (3 Ohm) & Relay
Bridge Rectifier(s): 2x GBU1506 (600V, 15A @ 100°C)
APFC MOSFETs: 2x Vishay SiHF30N60E (650V, 18A @ 100°C, Rds(on): 0.125Ohm)
APFC Boost Diode: 1x On Semiconductor FFSP0865A (650V, 8A @ 155°C)
Bulk Cap(s): 2x Nippon Chemi-Con (400V, 470uF each or 940uF combined, 2,000h @ 105°C, KMW)
Main Switchers: 2x On Semiconductor FCPF190N60E (600V, 13.1A @ 100°C, Rds(on): 0.19Ohm)
APFC Controller: Champion CM6500UNX & Champion CM03X
Resonant Controller: Champion CU6901VAC
Topology
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters
Secondary Side: +12V MOSFETs 6x On Semiconductor NTMFS5C430N (40V, 131A @ 100°C, Rds(on): 1.7mOhm)
5V & 3.3V: DC-DC Converters: 2x UBIQ QM3054M6 (30V, 61A @ 100°C, Rds(on): 4.8mOhm) & 2x UBIQ QN3107M6N (30V, 70A @ 100°C, Rds(on): 2.6mOhm)
PWM Controllers: UPI Semi uP3861P
Filtering Capacitors: Electrolytic: 7x Nippon Chemi-Con (1-5,000h @ 105°C, KZE), 7x Nippon Chemi-Con (4-10,000h @ 105°C, KY), 1x Rubycon (4-10,000h @ @ 105°C, YXJ)
Polymer: 37x FPCAP
Change Over Switch: 1x Sync Power SPN3006 MOSFET (30V, 57A @ 100°C, Rds(on): 5.5mOhm)
Supervisor IC: Weltrend WT7502R (OVP, UVP, SCP, PG)
The transient/EMI filter has all necessary parts and it does a good job, in restricting EMI emissions.
The main switching FETs, provided by Infineon, are installed into a half-bridge topology. An LLC resonant converter is also used to boost efficiency.
The APFC converter uses two Vishay FETs and a single boost diode, by On Semiconductor. These are high-quality parts.
The two powerful bridge rectifiers are more than enough to handle the max power that this platform can deliver.
Link:
https://www.tomshardware.com/uk/reviews/corsair-rm850x-2021-power-supply-review