Antec CSK 1000W PRO Power Supply - Semi-Modular - 120mm Whisper-Quiet Cooling Fan - 80 PLUS Bronze - ATX 3.1 & PCIe 5.1 Compatible / 0-761345-20073-8 / 0-761345-20073-8

The Antec CSK PRO ATX3.1 power supply delivers a robust 1000W of power, featuring a semi-modular design that balances quality, efficiency, and performance for demanding PC builds.

Equipped with the CircuitShield™ protection suite, this unit ensures industrial-level safety and consistent power delivery. It is backed by a 5-year warranty and carries an 80 PLUS BRONZE certification, reflecting its excellent price-to-performance value.

Fully compliant with ATX 3.1 standards, the CSK Pro includes a PCIe 5.1 12V-2x6 GPU cable, providing seamless power connectivity for modern hardware like the NVIDIA GeForce RTX 40 Series graphics cards.

Providing up to 90% efficiency, the CSK1000 Pro ATX3.1 maintains a stable 1000W output while minimizing energy waste and heat generation for a quieter, cooler computing environment.

The integrated 120mm silent fan delivers high airflow to keep components cool without generating excessive noise, maintaining the high standard of durability associated with Antec products.

Equipped with a dedicated Thermal Manager that uses low-voltage fan control, the unit intelligently monitors temperatures to ensure optimal noise levels and cooling performance during operation.

The semi-modular architecture allows users to connect only necessary cables, which significantly reduces internal clutter and improves chassis airflow for better overall system cooling.

Designed with a compact form factor, the Antec CSK 1000 PRO fits comfortably into a wide variety of computer cases, offering greater flexibility for diverse custom gaming builds.

The CircuitShield suite covers over-voltage, over-current, over-temperature and over-power protection, plus short-circuit, surge and inrush protection and no-load operation. Each one watches a different failure mode, from a shorted lead behind the motherboard tray to a spike arriving off the wall, and cuts the output before the fault reaches anything expensive. It is the part of a power supply you should never notice working.

Current graphics cards take their power through a single 12V-2x6 connector, and the CSK PRO ships with one rated to 600W. That means one cable from the supply to the card instead of a bundle of separate leads, and it follows the PCIe 5.1 specification today's cards are designed around. Fewer connections also means fewer places for a poorly seated plug to cause trouble.

Graphics cards no longer draw power smoothly; they spike hard and briefly as a scene loads or a shader compiles. The ATX 3.1 standard exists to handle exactly that behaviour, and this unit is certified to it, built to ride out excursions well above its steady rating without letting the rail sag. That is often the difference between a stable machine and one that reboots mid-match.

The rating here is continuous rather than peak, meaning the CSK PRO is built to hold 1000W under sustained load and not merely touch it briefly on a test bench. That headroom is what lets a high core-count processor and a flagship graphics card run flat out together without the supply becoming the part of the build that gives up first.