Intel 486 was nearly of the same speed as that of a first-generation Pentium. The earliest Pentiums were released with the clock speeds of 66 MHz and 60 MHz. Later on they came with versions of 75, 90, 100, 120, 133, 150, 166, 200 and 233 MHz. Pentium Over Drive processors were released at speeds of 63 and 83MHz.
Intel introduced MMX technology, this version of the Pentium had three new features, it includes 57 new instructions for better video, audio, and graphic capabilities. The cache was doubled to 32KB and it featured Single Instruction Multiple Data (SIMD) technology, which enables one instruction to give instructions to several pieces of data rather than a single instruction per piece of data.
