 Nehalem processors incorporate SSE 4.2 SIMD instructions, adding seven new instructions to the SSE 4.1 set in the Core 2 series.The Nehalem architecture reduces atomic operation latency by 50% in an attempt to eliminate overhead on atomic operations such as the codice_1 compare-and-swap instruction.The successor to "Nehalem" and "Westmere" is "Sandy Bridge".