Antec CSK850 PRO 850W PSU – ATX 3.1, PCIe 5.1, Semi-Modular, 5-Year Warranty

Antec CSK850 PRO 850W PSU – PCIe 5.1 Ready, Semi-Modular Efficiency

The Antec CSK850 PRO delivers robust and future-ready power with ATX 3.1 compliance and native PCIe 5.1 (12V-2×6) support. Engineered for modern systems, this semi-modular 850W power supply features 80 PLUS Bronze certification, quiet thermal-controlled cooling, and comprehensive protection via Antec's CircuitShield™ suite.

With a compact design and optimized cabling layout, the CSK850 PRO is ideal for gamers, creators, and professionals seeking solid performance and upgrade-ready power delivery.

Key Features & Benefits

✅ 80 PLUS Bronze Certified – Up to ~90% efficiency for reduced heat and energy savings
✅ ATX 3.1 & PCIe 5.1 Ready – Fully supports next-gen GPUs with native 12V-2×6 connector
✅ 850W Continuous Power – Designed for high-performance gaming and workstation setups
✅ Semi-Modular Design – Simplifies cable management and improves airflow
✅ Silent 120mm Fan – Controlled by Antec’s Thermal Manager for whisper-quiet operation
✅ Strong Protection Suite – CircuitShield™ includes OCP, OVP, UVP, SCP, OPP, OTP, SIP, and NLO
✅ 5-Year Warranty – Backed by Antec’s quality assurance and technical support

Specifications

Model: CSK850 PRO
MPN: 0-761345-20071-4
Form Factor: ATX 12V 3.1 (Semi-Modular)
Wattage: 850W Continuous
Efficiency: 80 PLUS Bronze (~90%)
Input Voltage: 200–240V AC
Input Frequency: 50–60Hz
Input Current: 12A Max
PFC: Active PFC
Power Good Signal: 100–150ms
Operating Temperature: 0–40°C

Cooling & Noise

• Fan Size: 120mm

• Type: Silent fan with Thermal Manager for adaptive speed control

Connectors

• 1 x 24-pin ATX Main

• 1 x 16-pin PCIe 5.1 (12VHPWR – up to 600W)

• 2 x 8-pin (4+4) CPU EPS

• 4 x 8-pin (6+2) PCIe

• 6 x SATA Power

• 3 x Molex (Peripheral)

Physical Details

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

• Net Weight: Approx. 1.95 kg

Protection & Certifications

CircuitShield™ Protections:

• OCP (Over Current Protection)

• OVP (Over Voltage Protection)

• UVP (Under Voltage Protection)

• SCP (Short Circuit Protection)

• OPP (Over Power Protection)

• OTP (Over Temperature Protection)

• SIP (Surge Inrush Protection)

• NLO (No Load Operation)

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

The Antec CSK850 PRO offers unbeatable value with next-gen GPU support, semi-modular convenience, and quiet, efficient operation—making it a top choice for modern mid-to-high-end PC builds.