Memory Registry

Memory Registry is structure of memory work in system, part by part memory have diferent function, Registerd Memory also called buffered, They place less electrical load on the memory controller and allow single systems to remain stable with more memory modules than they would have otherwise. Registered memory is often more expensive because of the lower volume and the additional components, so it is usually found only in applications where the need for scalability and stability outweighs the need for a low price (servers, for example). Although most server-grade memory modules are both ECC and registered, there are both registered non-ECC modules and non-registered ECC modules.

Buffered memory is an older term for registered memory (It's actually different and registered RAM won't fit in a standard slot, buffered refers to an electronic buffer placed between the memory and the memory controller, Allmost all structure memory now is like this in 32bit

EAX, EBX, ECX and EDX are called "General Purpose Register"

EAX : Extended Accumulator Register
EBX : Extended Base Register
ECX : Extended Counter Register
EDX : Extended Data Register
ESI : Extended Source Index
EDI : Extended Destination Index
EBP : Extended Base Pointer
ESP : Extended Stack Pointer
EIP : Extended Instruction Pointer