Different CPUs
can have different form factors and packaging specifications.
Although Intel and AMD central processing units (CPUs) are functionally similar, each company's processors require processor-specific support hardware. Hardware built and optimized for Intel CPUs won't support AMD CPUs. Processors designed for AMD will, likewise, not support Intel.
Sockets
Both Intel and AMD have unique socket configurations for their processors. These sockets can differ both in size and shape. In some cases, a CPU may be mounted with other supporting circuitry in a larger edge-card package.
BIOS
Because AMD and Intel processors have different architectures, the binary input/output system (BIOS) for each processor is different. A BIOS written for an AMD processor will not correctly send and receive data from an Intel, and a BIOS engineered for Intel processors won't properly control an AMD.
Motherboards
Different CPUs require different supporting circuitry, in addition to sockets and BIOS. A particular AMD CPU, for example, may work with a particular type of random access memory (RAM). Another example may be a particular Intel processor mounted on an edge card with proprietary memory access controllers. Boards designed for that CPU may not have on-board memory controllers.
Tags: Different CPUs, have different, Intel processors, supporting circuitry