Computer Schematic Design | Wiring Diagram Database Computer Schematic Design. By Anna Mia Perolo On September 25, 2019 In Wiring Diagram 198 views4.1/5(180) CPU (Central Processing Unit) Block Diagram CPU word size is the largest number of bits that can be handled by CPU in one clock cycle. It is either 8, 16, 32, 64 or 128 bit. This word size value determines number of bit processor i.e. 8-bit processor, 16-bit processor, 32 bit processor etc. CPU performance also depends upon the RAM, bus speed and cache size as well.