64-bit architecture refers to a computer system design that allows for the processing of data in 64-bit chunks. This means it can handle larger amounts of memory and perform more complex calculations compared to 32-bit systems. A 64-bit processor can access over 18 quintillion bytes of RAM, significantly enhancing performance for demanding applications. In addition to increased memory capacity, 64-bit architecture improves overall system efficiency. It enables better multitasking and faster execution of software, particularly for applications like video editing, 3D rendering, and gaming. As a result, most modern computers and operating systems are built on this architecture.