Pentium II Overdrive (a Pentium II chip in the 387 pin Socket 8).Celeron (Covington/Mendocino/Coppermine/Tualatin variants).New instructions in Pentium III: Streaming SIMD Extensions.
New instructions in Pentium II Deschutes core: MMX, FXSAVE, FXRSTOR.Other new instructions: FCMOV, FCOMI/FCOMIP/FUCOMI/FUCOMIP, RDPMC, UD2.CMOV instructions, which are heavily used in compiler optimization.Register renaming, which enabled more efficient execution of multiple instructions in the pipeline.Physical Address Extension (PAE) and a wider 36-bit address bus to support 64 GB of physical memory.A front-side bus using a variant of Gunning transceiver logic to enable four discrete processors to share system resources.