The Antec CSK850 PRO is an 850 W semi-modular power supply designed for modern gaming and high-performance PCs. Compliant with the ATX 3.1 standard and PCIe 5.1 ready, it supports the latest graphics cards through its native 12V 2×6 (12VHPWR) connector. Featuring 80 Plus Bronze efficiency and advanced CircuitShield™ protection, this PSU ensures reliable, efficient, and safe power delivery. Its compact design, quiet 120 mm fan with intelligent thermal control, and semi-modular cables make installation easy and improve system airflow. Backed by a 5-year warranty, it is a future-proof choice for demanding PC builds.

Full Specifications

Model:
CSK850 PRO

MPN:
0-761345-20071-4

Form Factor:
ATX 12V 3.1 semi-modular

Wattage:
850 W continuous

Efficiency:
80 Plus Bronze (up to ~90%)

ATX Standard:
ATX 3.1

PCIe Support:
PCIe 5.1 native 12V 2×6 GPU connector

Protection Features (CircuitShield™):
OCP, OVP, UVP, SCP, OPP, OTP, SIP, NLO

Cooling:
120 mm silent fan with thermal manager fan speed control

PFC:
Active PFC

Power Good Signal:
100–150 ms

Input Voltage:
200–240 V AC, 12 A max, 50–60 Hz

Dimensions (L x W x H):
140 x 150 x 86 mm

Net Weight:
Approximately 1.95 kg

Connectors:
1 x 24-pin ATX main
1 x 16-pin (12+4) PCIe 5.1 (12VHPWR, up to 600 W)
2 x 8-pin (4+4) CPU EPS
4 x 8-pin (6+2) PCIe
6 x SATA
3 x Molex

Operating Temperature:
0–40 °C

Certifications:
TUV, CB, RCM, CE, BIS, UKCA, KC

Warranty:
5 years