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x64 is a computer term that refers to a 64-bit central processing unit (CPU) and its corresponding architecture. The term is used to distinguish it from the older, 32-bit x86 architecture. Key differences between x64 and x86. The primary differences between x64 (64-bit) and x86 (32-bit) are related to memory, data processing, and performance:

Memory capacity: An x64 system can access a significantly larger amount of Random Access Memory (RAM). The older 32-bit x86 architecture can only address a maximum of 4GB of RAM.

Data processing: A 64-bit processor can handle and process larger chunks of data at once, which can lead to better performance for tasks like video editing, scientific simulations, and gaming.

Backwards compatibility: A 64-bit system is backward compatible, meaning it can run most 32-bit applications. However, a 32-bit system cannot run 64-bit software.

Instruction sets: The x64 architecture is an extension of the x86 instruction set. This means 64-bit programs can take advantage of extra instructions and registers, which may increase execution speed.

Security: x64 systems often have enhanced security features to protect against malicious software.