Part Analysis
| General Data | |
| Manufacturer (OEM) | HEC |
| PCB Type | Double-Sided |
| Primary Side | |
| Transient Filter | 4x Y caps, 3x X caps, 2x CM chokes, 1x MOV, 1x Power Integrations CAP200DG (Discharge IC) |
| Inrush Protection | NTC Thermistor SCK-056 (5 Ohm) & Relay |
| Bridge Rectifier(s) |
2x GBU1506 (800V, 15A @ 100°C)
|
| APFC MOSFETs |
2x Great Power GP47S60 (600V, 47A, Rds(on): 0.081Ohm)
|
| APFC Boost Diode |
1x CREE C6D10065A (650V, 10A @ 155°C)
|
| Bulk Cap(s) |
1x Teapo (400V, 680uF, 2,000h @ 105°C, LS)
|
| Main Switchers |
2x GP36S60YERD
|
| APFC Controller |
Champion CM6500UN & CM03AX
|
| Resonant Controller | Champion CM6901T6X |
| Topology |
Primary side: APFC, Half-Bridge & LLC converter
Secondary side: Synchronous Rectification & DC-DC converters |
| Secondary Side | |
| +12V MOSFETs | no info |
| 5V & 3.3V | DC-DC Converters: 4x Potens Semiconductor PDD3906 (30V, 51A @ 100°C, Rds(on): 6mOhm) & 4x Excelliance MOS EMB07N03V (20V, 17A @ 100°C, Rds(on): 7mOhm) PWM Controller(s): 2x APEC APW7073 |
| Filtering Capacitors | Electrolytic: 11x Teapo (1-3,000h @ 105°C, SC), 1x Nichicon (4-10,000h @ 105°C, HE) Polymer: 4x Elite, 6x Teapo, 13x no info |
| Supervisor IC | Weltrend WT7527RT (OCP, OVP, UVP, SCP, PG) |
| Fan Model | Hong Hua HA1225H12F-Z (120mm, 12V, 0.58A, Rifle Bearing Fan) |
| 5VSB Circuit | |
| Rectifier |
1x PS1060L SBR (60V, 10A)
|
| Standby PWM Controller | Power Integrations TNY290PG |
The RMx (Shift) and RMx use platforms by CWT, but for RMe, Corsair decided to trust HEC, which has vast experience in building affordable platforms. The parts used are not by top-notch manufacturers like Infineon, Chemi-Con, Rubycon, etc., but still are by decent brands, which is why Corsair provides a long, seven-year warranty.
On the primary side, we find the typical stuff for a modern PSU: APFC, half-bridge topology, and an LLC resonant converter. On the secondary side, FETs regulate the 12V rail, while the minor rails are generated through a pair of VRMs.
The cooling fan is by Hong Hua and uses a rifle bearing for lower noise output which might not be as good as a similar spec fluid dynamic bearing but still is massively superior to a plain sleeve bearing. Lastly, the soldering quality is not the best I have seen from HEC, but I got an early review sample, so it might be better in the mass-production units.
I’ve noticed quite a few reviews of this PSU, both online and one person I know personally, which have reported really bad coil whine issues just by turning the PSU on. I’m wondering if there was a large bad batch that went out and the rest are fine or if this is a bigger problem. Regardless, I’m really glad to see a slightly more budget series from corsair to slip between their cxm and rmx series assuming this coil whine issue isn’t widespread.
This is a new product, just got released, so you probably refer to the previous RMe. We didn’t notice any strange issues in our tests, and we have tested almost a dozen different RMe models.
Hello,
Any incoming review of the RM850e model?
Once they send us a sample, sure!
Ah my mistake. Thanks for the clarification. I guess me and a couple others just got unlucky.
Hello Aris,
The soldering it’s bad as it can be. Off centered and off axis SMD, cold joints and manual soldering for some parts. High Power parts with half the flux.
You call this “Average soldering quality”? This thing it’s a fire hazard waiting to happen.
BTW can you give an example of bad soldering in your reviews?
Hi there! This unit is a fire-hazard? It passed hours of testing under the toughest possible condition without breaking or creating any issues.
Where did you see cold joints? If a joint is cold, the unit wouldn’t work at the first place.
Believe me this is average to my eyes. For me notably problems are mostly long component leads which can create shorts and when solder is missing, creating poor connections and increased resistance.
This is bad soldering example: https://www.techpowerup.com/review/xigmatek-maverick-s-500/4.html
The manual soldering done on some SMD parts point me to this cold joints issue, if the QC misses one then here you go.
Also too little flux for the FET’s could lead in time to a crack. Those parts get thermal cycle all day long.
Remember the we don’t buy PSU’s for 1-2 years.
Yeah the example is real bad, thanks for sharing.
Keep up the good work man.