Cache

Processors running at 50 MHz or faster should have a heat sink on top of them to draw away the heat. Take the heat sink and chip out of the socket to read the markings at the bottom. Additional cooling fans and heavy duty power supply are required to work at a high speed.

72 pin SIIM (Single Inline Memory Module) is 32 bit, while the DIIM (Double Inline Memory Module) is 64 bit - for Pentiun III and Celeron processors. Most processors have 32 bit internal registers, while Itanium is 64 bit.

Address bus indicates the maximum amount of RAM that a chip can address. Pentium II onwards use 32 bit address bus, with an addressing capacity of 2^32 bits (64 GB).

On latest processors the L1 cache is 64 kB and it runs at the same speed of the processor. L1 cache can be as addressed without time delay. Memory speed is expressed in ns (nano second/10^-9 s).