A graphics accelerator is specialized hardware that offloads visual processing from the CPU. It is built to render images, transform 3D scenes, and move pixels efficiently, often using highly parallel computation. In older PCs this role was handled by a graphics card; in modern systems it is usually a GPU, but the security meaning is the same: dedicated hardware can process large workloads much faster than the general-purpose CPU.
This matters in cyber security because the same parallel speed that helps games and interfaces can also help attackers and defenders. Attackers use graphics accelerators to brute-force passwords, crack hashes, and mine cryptocurrency with stolen resources. Defenders use them for fast malware analysis, video inspection, machine learning, and other tasks that benefit from massive parallelism. Security teams also watch for unauthorized GPU use, since unusual accelerator activity can indicate abuse, persistence, or data-processing malware running on a host.