CORSAIR 4000D RS Frame Modular High Airflow Mid-Tower PC Case – 3X RS Fans – InfiniRail Mounting System – Fits Multiple 360mm Radiators – Reverse Connector Motherboard Compatible – Black

by Corsair

4.7★ · 418 Amazon ratings as of Jul 9, 2026

• FRAME Modular Case System – The revolutionary FRAME system gives new meaning to the word customization. Want to upgrade the motherboard tray to billet aluminum? Want to swap out your front I/O panel for more USB ports? Now you can. A case that can change and grow with your needs (or just your mood). The options are nearly limitless
• 3x CORSAIR RS PWM Fans – High-performance fans pre-installed in the front of case. Support daisy-chainable 4-pin PWM connections and Zero RPM mode for near-silent operation at low loads
• CORSAIR InfiniRail Fan Mounting System – This steel multi-point mounting system offers unmatched flexibility in front and roof fan configuration. Simply slide the rail to mount fans up to 200mm (140mm in the roof) wherever you like, ensuring targeted airflow without fixed mounting constraints
• Clean Lines or Turbo Cooled – The internal side panel near the motherboard tray can be used as a cable cover for clean cable management, or you can remove it and mount fans to the side for increased cooling potential
• 3D Y-Pattern Airflow Panel – Optimized for high airflow and minimal restriction, the steel front panel is perforated in three dimensions with a Y-pattern that provides a low-obstruction path for cool air