ASUS Chassis, Double-sided high-capacity 4U storage server with support for up to 36 drives  

4U Supermicro chassis offers extra high-density of HDD per space ratio in this form factor

Supermicro GPU Super Workstation 7049GP-TRT, Support for up to 4 GPU's

Supermicro 4U Chassis, suited for Virtualization, support up to 8x double width GPU