Chieftec ATMOS 850W Power Supply

850 W · 80+ Gold · Fully modular

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Wattage 850 W
Efficiency 80+ Gold
Modular Fully modular
Form factor ATX

Chieftec ATMOS 850W Power Supply is a 850 W power supply rated 80+ Gold (fully modular). Pick one with some headroom above your build's draw. It came out in 2023.

Released: 2023-10-16

Specifications

Key specs

Wattage: 850 W
Efficiency: 80+ Gold
Modular: Fully modular
Form factor: ATX
Released: 2023-10-16
Part number: CPX-850FC
EAN / UPC: 0753263078407

Power

Total power: 850 W
AC input voltage: 100 - 240 V
AC input frequency: 50/60 Hz
Input current: 10-5 A
Maximum input current (@110V): 10 A
Maximum input current (@220V): 5 A
Power factor: 0.9
Power Factor Correction (PFC) type: Active
Combined power (+5Vsb): 15 W
Max output current (+3.3V): 20 A
Max output current (+12V1): 70.8 A
Max output current (+5V): 20 A
Max output current (-12V): 0.3 A
Max output current (+5Vsb): 3 A

Ports & interfaces

Motherboard power connector: 20+4 pin ATX
Motherboard power cable length: 60 cm
Number of SATA power connectors: 9
SATA power cable length: 550,750,650 mm
Peripheral (Molex) power cable length: 550,850,750,650 mm
EPS power connector (4+4 pin): Yes
PCI Express power connectors (16-pin): 1
CPU power cable length: 60 cm
ATX power connector (20+4 pin): Yes
Cabling type: Fully-Modular

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Performance

80 PLUS certification: 80 PLUS Gold
Supported motherboard form factors: ATX
Purpose: PC/Server
Power supply unit (PSU) form factor: ATX
ATX version: 3.0

Design

Product colour: Black
Fan diameter: 12 cm
On/off switch: Yes

Weight & dimensions

Width: 150 mm
Depth: 140 mm
Height: 86 mm
Weight: 1.52 kg

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About this product

The CHIEFTEC ATMOS series is built to Intel‘s ATX 3.0 standard and supports PCIe GEN5 with 80 PLUS® GOLD certified efficiency, delivering exceptional performance up to 850W. The ATMOS series features a state-of-the-art technical design including an SRC Full-bridge converter with DC-to-DC technology, and Japanese capacitors to ensure longevity and stability. The ATMOS 120mm FDB silent fan optimizes the balance between cooling and noise with excellent durability, while the ECO fan mode enables fanless operations at low loads. CHIEFTEC’s multiple security protection technology is designed to keep your system safe.

ATMOS vs similar power supplies

	Chieftec ATMOS 850W Power Supply	Chieftec Vega PPG-850-CW 850W Power Supply	Chieftec Vega PPG-850-C 850W Power Supply	Chieftec POLARIS 3.0 850W
Wattage	850 W	850 W	850 W	850 W
Efficiency	80+ Gold	80+ Gold	80+ Gold	80+ Gold
Modular	Fully modular	Fully modular	Fully modular	Fully modular
Form factor	ATX	ATX	ATX	ATX
Released	2023	2025	2025	2023