The CORSAIR FRAME 4000D is a fully-modular and spacious mid-tower PC case featuring InfiniRail™ Fan Mounting System and compatible with reverse connector motherboards. Includes Fully-modular design for next-level customization InfiniRail™ Fan Mounting System for easier building Dual 360mm radiator support GPU anti-sag stabilization arm Compatible with reverse connector motherboards including ASUS BTF, MSI PROJECT ZERO, and GIGABYTE PROJECT STEALTH | CORSAIR FRAME 4000D Modular Mid-Tower PC Case