Antec CSK850 PRO 850 W Semi-Modular ATX 3.1 Power Supply
The Antec CSK850 PRO is an 850 W semi-modular power supply built 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 via its native 12V 2x6 (12VHPWR) connector. With 80 Plus Bronze efficiency and advanced CircuitShield™ protection, this PSU delivers reliable, efficient, and safe power for demanding builds.
A compact design, quiet 120 mm fan with intelligent thermal control, and semi-modular cable layout make installation straightforward and help improve system airflow. Backed by a 5-year warranty, the CSK850 PRO is a future-proof choice for performance-oriented systems.
Key Features
- 850 W continuous output for gaming and high-performance PCs
- ATX 3.1 compliant and PCIe 5.1 ready
- Native 12V 2x6 (12VHPWR) connector for the latest GPUs
- 80 Plus Bronze efficiency (up to ~90%)
- CircuitShield™ protection suite for safe power delivery
- Semi-modular cabling for cleaner builds and improved airflow
- 120 mm silent fan with thermal manager fan speed control
- Compact ATX form factor for easy installation
- 5-year warranty
Full Specifications
| Specification | Details |
|---|---|
| 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 2x6 GPU connector |
| Protection (CircuitShield™) | OCP, OVP, UVP, SCP, OPP, OTP, SIP, NLO |
| Cooling | 120 mm silent fan with thermal manager 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 |
| Operating Temperature | 0–40 °C |
| Certifications | TUV, CB, RCM, CE, BIS, UKCA, KC |
| Warranty | 5 years |
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
