The first Pentium processor is code-named P5 and was released in two versions; 60MHz and 66MHz. It contains 3.1 million transistors, uses 5V to operate and is made in a 0.8 µm process.

Major differences in the Pentium are:
Superscalar architecture
The Pentium has two pipelines (datapaths) that allow to complete two instructions per clock cycle. The main pipe can handle any instruction, while the other can handle most common simple instructions.

64-bit external databus
Doubles the amount of data being transferred to the memory and I/o compared to a 486.

Seperation of code and data cache
Decreases the fetch and operand read/write conflicts.

Faster floating point unit