A user has a CAD / CAM workstation that is to be reconfigured into a Gaming PC. Which of the following would be the EASIEST and MOST effective upgrade?

CAD/CAM workstations are optimized for precision compute and graphics workloads and typically ship with basic integrated or low-quality audio. Installing a dedicated sound card improves audio quality and provides features like surround sound processing that are important for an immersive gaming experience, and it requires only a PCIe slot insertion with driver installation.

A TV tuner card enables viewing and recording broadcast television and provides no meaningful gaming performance or experience improvement.

L2 cache is embedded directly in the CPU die and cannot be added or upgraded as a separate component after manufacture.

A USB 3.0 expansion card adds high-speed USB ports but does not enhance the gaming experience in any direct way for a system already configured for high-performance workloads.