Which characteristic makes 64-bit processors advantageous?

The advantage of 64-bit processors primarily lies in their ability to support more RAM compared to 32-bit processors. A 32-bit processor can theoretically address a maximum of 4 gigabytes of RAM, which can be limiting for modern applications that require more memory for optimal performance. In contrast, a 64-bit processor can address vastly larger amounts of RAM—up to 16 exabytes—making it more capable of handling demanding tasks such as video editing, large database management, and running multiple applications simultaneously. This increased capacity allows for improved multitasking, better performance in memory-intensive applications, and an overall enhancement in system responsiveness, especially in environments where substantial amounts of data are processed.

In contrast, the other options do not directly relate to the fundamental capabilities of 64-bit architecture. While lower power consumption and compatibility with older software may be relevant considerations in the context of processor design, they do not specifically highlight the core benefit of increased RAM support that sets 64-bit processors apart. Enhanced video performance, while potentially an outcome of a more powerful CPU architecture, is not inherent to the 64-bit addressable space itself.