CORSAIR 4000D RS ARGB Frame Modular Mid-Tower ATX PC Case, High Airflow, 3X Pre-Installed RS Fans, InfiniRail™ Mounting System, ASUS BTF, MSI Zero, Gigabyte Stealth, Black

by Corsair

4.7★ · 1,670 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 ARGB 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. Each Fan has eight LEDs and easily controllable with your motherboard’s +5V ARGB connector
• 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
• 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