How many screws need to be removed in order to release the AOC card from...

An AOC (Add-On Card) in Supermicro systems, such as a NIC or GPU card, is secured to its bracket with1 screwon the metal bar at the top, a standard PCIe card mounting practice (e.g., SYS-420GP-TNAR manuals). This single screw ensures stability while allowing easy removal, consistent with Supermicro’s DLC system serviceability. 4 (A), 2 (B), or 3 (D) screws would be excessive for a single card bracket. Supermicro’s modular design in DLC solutions supports C as the verified number.References:Supermicro AOC card installation guides, DLC system component specs.