Summary
The platform of the RM850x comes from CWT and the components used are of high quality. The same applies to the magnetic bearing fan. All capacitors are from Japanese manufacturers (Chemi-Con and Rubycon) and a large number of high quality polymer capacitors (FPCAP) are also used. Since the PCB dimensions are regular, there is plenty of space between components so that airflow is not obstructed. The temperature development is good and only the fan disturbs at the higher load of the 5V and 3.3V rails. The soldering quality is good, but could be improved in places.
The fan is a relatively quiet Corsair NR140ML which acts with an average of 34.5 dB(A). It has a diameter of 140 mm and uses an exemplary magnetic bearing. The protection functions OCP at +12 V and OPP are set correctly, while the side rails unfortunately have quite high trip points. All other protection features are also present and work well. The average efficiency is 90.24% and is not particularly high compared to other gold platforms. This is the only area where this platform doesn’t perform as well.
The APFC converter does a good job and transients of all kinds are not an issue either. The behaviour is good on all rails, especially on the side rails. The DC-DC converters on this new RMx platform have the necessary reserves to handle heavy transient loads. This puts the 2021 Corsair RM850x on par with the Seasonic Focus Plus Gold and the EVGA SuperNova 850 G3 with similar performance.
Conclusion
The new Corsair RMx power supplies are ASM compliant and deliver the same performance as their predecessors while actually surpassing them in some key areas, including efficiency at very light and light loads. The newly added ML fan is a great addition. Not that the previous generation fan wasn’t good, on the contrary, but these ML fans are simply better as they have no problems operating under high operating temperatures even for extended periods of time.
Another significant change is the additional EPS connector on the 850-W and 1000-W models. I can’t help but wonder what CPU needs that many EPS connectors. To my knowledge, there is currently no motherboard with three EPS connectors, but Corsair will have their reasons for the addition, or may already know more. The competition in the 850 W Gold category is fierce, no question about it. Still, the Corsair RM850x does well, coming in third in Aris’ relative performance chart.
Practically speaking, the RM850x and Focus GX-850 are the frontrunners in the 850W category. Also worth mentioning in this performance range is the Thermaltake ToughPower GF1 850, which is also based on a CWT platform. In summary, we can say that the Corsair RM850x is a good product and you can put it in your shopping cart without hesitation – if you can get it somewhere for the advertised price of just under 150 Euros. Purchase tip without ulterior motives, but with seasonal obstacles 🙂
Corsair RMx Series 2021 RM850x 850W ATX 2.4 (CP-9020200-EU)
Zentrallager: >5 Stück bestellt, wird in 4 Werktagen erwartetFiliale Wilhelmshaven: >5 Stück bestellt, wird in 4 Werktagen erwartetStand: 27.04.24 01:30 | 131,65 €*Stand: 27.04.24 01:31 | |
Auf Lager, 1-2 Werktage | 131,66 €*Stand: 27.04.24 01:04 | |
Ware lagernd - versandfertig - Lieferzeit 1-3 Werktage | 146,59 €*Stand: 26.04.24 23:50 |
- 1 - Unboxing, Vorstellung und technische Daten
- 2 - Anschluss-Kabel und Kabel-Management
- 3 - Innerer Aufbau und Komponenten
- 4 - Spannungsregulation und Restwelligkeit (Ripple)
- 5 - Effizienz
- 6 - Geräuschemission und Lüfterdrehzahlen
- 7 - Crossload im Detail
- 8 - Timing Tests
- 9 - Erweiterte Transienten-Tests
- 10 - Schutzfunktionen, Power Sequencing, EMV
- 11 - Zusammenfassung und Fazit
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