Chieftec Atmos CPX-850FC
 | Outdated Product High-performance computer power supply unit from Chieftec with a power reserve of 850 W, support for the ATX 3.0 power standard, and high energy distribution efficiency (80+ Gold standard, 90% efficiency). The model is part of the relatively new Atmos power supply line and is positioned as a modern and highly reliable solution for gaming PCs and workstations equipped with powerful graphics cards from Radeon and NVIDIA supporting the PCIe 5.0 power standard. The design uses Japanese capacitors Nippon Chemi-Con, ensuring long service life and high device reliability. The main power scheme is built on an SRC Full-bridge converter using DC-to-DC technology, which allows for maximum efficient load distribution. Active PFC and a semi-passive cooling syst...em provide optimal energy consumption and operational stability under any loads, from moderate to peak. The IN1S429I-DCG protection chip ensures the power supply's safety, providing overvoltage, overcurrent, and short-circuit protection. According to the manufacturer, the 120 mm Hong Hua fan with a hydraulic bearing guarantees low noise levels and long service life at all load levels. When power consumption is below 200 W, the power supply switches to ECO mode, disabling the fan to reduce noise. The manufacturer's official warranty is 5 years. E-Catalog uses affiliate links compensated by our partners. |
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120mm fan Hong Hua HA1225H12F-Z. Nippon Chemi-Con input capacitor. Six transistors and an APW7159C controller. The IN1S429I-DCG chip is responsible for protection.
High-performance computer power supply unit from Chieftec with a power reserve of 850 W, support for the ATX 3.0 power standard, and high energy distribution efficiency (80+ Gold standard, 90% efficiency). The model is part of the relatively new Atmos power supply line and is positioned as a modern and highly reliable solution for gaming PCs and workstations equipped with powerful graphics cards from Radeon and NVIDIA supporting the PCIe 5.0 power standard.
The design uses Japanese capacitors Nippon Chemi-Con, ensuring long service life and high device reliability. The main power scheme is built on an SRC Full-bridge converter using DC-to-DC technology, which allows for maximum efficient load distribution. Active PFC and a semi-passive cooling system provide optimal energy consumption and operational stability under any loads, from moderate to peak.
The IN1S429I-DCG protection chip ensures the power supply's safety, providing overvoltage, overcurrent, and short-circuit protection. According to the manufacturer, the 120 mm Hong Hua fan with a hydraulic bearing guarantees low noise levels and long service life at all load levels. When power consumption is below 200 W, the power supply switches to ECO mode, disabling the fan to reduce noise. The manufacturer's official warranty is 5 years.
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Chieftec 2026 - new arrivals, bestsellers, and the most relevant models Chieftec.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Chieftec 2026 - new arrivals, bestsellers, and the most relevant models Chieftec.
Model overview based on user reviews
The Chieftec Atmos Atmos, specifically the CPX-850FC model, has received mixed reviews from users. One user praised it for being very quiet and described it as a wonderful model. However, another user expressed dissatisfaction, citing issues such as noise, squeak, and an unpleasant smell. They also mentioned that the power supply seemed to struggle under load and suggested that the product might not meet expectations. Despite the positive feedback on its quiet operation, potential buyers should be aware of the reported issues regarding noise and quality.
Pros
Cons
1 1 0 2 |
Bought at the end of 2024 for this setup: Ryzen 7 7700 + RX6800XT (I chose this power supply to have some room for future system upgrades in a few years). I was happy with the previous 500 or 550W unit from this brand - no issues for 7-8 years of operation. I went through a lot of reviews, tests. Everything seemed fine. Worked in ECO mode - quietly, all good. But in January 2026, I heard a pop while gaming and everything went dark. Took the PC to repair - the power supply was dead =( And the warranty was only for a year... Quiet operation, modularity Worked for a year and one or two months  Ivan Lis: use Chieftec CPX-850FC more than year |
Chose this power supply after watching a bunch of reviews. I was looking for one with a PCIe 5.0 (12VHPWR) connector. No complaints about its performance. It works quietly and there are no foreign noises. The only thing is that when turning it off, at the very end, there's a not-so-pleasant click, but it doesn't affect the performance. I've been using it for a year. Well-known brand, Japanese capacitors, eco mode available Without showing up Vasil: use Chieftec CPX-850FC more than year |
Very quiet Not found Igor: |
3 out of 4 user review(s) shown
1 more user review(s)
Video reviews
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CHIEFTEC ATMOS CPX-850FC PSU Unboxing
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