Antec CSK850 PRO 850W Semi-Modular ATX 3.1 Power Supply, PCIe 5.1 Ready with 12V 2x6 Connector, 80 Plus Bronze Certified, Quiet 120mm Fan, 5-Year Warranty

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 2x6 (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.

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 3.1

PCIe Support

PCIe 5.1 native 12V 2x6 GPU connector

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

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

Warranty

5 years