The Pentium 4 processor also features:
- New Level 1 cache technology – Execution Trace Cache, which delivers a higher performance instruction cache than the Pentium III through a more efficient use of cache memory.
- NetBurst microarchitecture doubles the pipelength depth to 20 stages, and increases the frequency capability.
- Streaming SIMD extension 2 (SSE2) — 144 new instructions, a 128-bit SIMD integer arithmetic and 128-bit SIMD double precision floating point instructions.