List of Intel Xeon processors (Nehalem-based)

"Lynnfield" (45 nm)

 * Based on Nehalem microarchitecture
 * Uni-processor only
 * All models except X3430 support Hyper-Threading
 * All models support: MMX, XD bit, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Intel 64, SpeedStep, Turbo Boost, Smart Cache, VT-x, EPT, VT-d, TXT, ECC 
 * Die size: 296 mm²
 * Steppings: B1

"Bloomfield" (45 nm)

 * Based on Nehalem microarchitecture
 * Uni-processor only
 * Quad-core models support: Hyper-Threading, Turbo Boost
 * All models support: MMX, XD bit, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Intel 64, SpeedStep, Smart Cache, VT-x, EPT, ECC
 * Die size: 263 mm²
 * Steppings: D0

"Jasper Forest" (45 nm)

 * Based on Nehalem microarchitecture
 * Uni-processor only
 * LC3528 supports: Hyper-Threading, Turbo Boost
 * All models support: MMX, XD bit, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Intel 64, SpeedStep, Smart Cache, VT-x, EPT, VT-d, ECC
 * Die size: 263 mm²
 * Steppings: B0

"Clarkdale" (MCP, 32 nm)

 * Based on Westmere microarchitecture
 * Uni-processor only
 * L3406 supports Hyper-Threading, Turbo Boost
 * All models support: MMX, XD bit, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Intel 64, SpeedStep, Smart Cache, VT-x, EPT, VT-d, TXT, ECC 
 * Die size: 81 mm² (CPU Component)
 * Steppings: C2

"Gulftown" (32 nm)

 * Based on Westmere microarchitecture
 * Uniprocessor-only systems
 * All models support: MMX, XD bit, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Intel 64, Hyper-Threading, AES-NI, SpeedStep, Turbo Boost, Smart Cache, VT-x, EPT, VT-d, TXT, ECC
 * Die size: 240 mm²
 * Steppings: B1

"Nehalem-EP (Gainestown)" (45 nm) Efficient Performance

 * Based on Nehalem microarchitecture
 * All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Demand-Based Switching (Intel's Server EIST), Intel 64, XD bit (an NX bit implementation), Intel VT-x, Intel EPT, Intel VT-d, Intel VT-c, Intel x8 SDDC 
 * All models support: Hyper-Threading, Turbo Boost except E5502, E5503, E5504, E5506, L5506, E5507
 * All models support dual-processor configurations
 * Die size: 263 mm²
 * Steppings: D0

"Jasper Forest-DP" (45 nm)

 * Based on Nehalem microarchitecture
 * All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Demand-Based Switching (Intel's Server EIST), Intel 64, XD bit (an NX bit implementation), Intel VT-x, Intel EPT, Intel VT-d, Intel VT-c, Intel x8 SDDC 
 * EC5549, LC5528, and LC5518 support: Hyper-Threading, Turbo Boost
 * Die size: 263 mm²
 * Steppings: B0

"Westmere-EP" (32 nm) Efficient Performance

 * Based on Westmere microarchitecture
 * All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), TXT, Intel VT-x, Intel EPT, Intel VT-d, Intel VT-c, Intel x8 SDDC, AES-NI, Smart Cache, Hyper-Threading, Turbo Boost except E5603, E5606, E5607, L5609
 * Dual-socket configurations supported
 * Die size: 240 mm²
 * Steppings: B1

"Nehalem-EX (Beckton)" (45 nm) Expandable

 * Based on Nehalem microarchitecture
 * All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), TXT, Intel VT-x, Intel EPT, Intel VT-d, Intel VT-c, Intel x8 SDDC, Turbo Boost, Smart Cache, Hyper-Threading except X7542
 * 65xx models support single- and dual-processor configurations, while 75xx models support up to 8-processor configurations
 * Transistors: 2.3 billion
 * Die size: 684 mm²
 * Steppings: D0

"Westmere-EX" (32 nm) Expandable

 * Based on Westmere microarchitecture.
 * All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), TXT, Intel VT-x, Intel EPT, Intel VT-d, Intel VT-c, Intel DDDC, Hyper-threading (except E7-8837), Turbo Boost, AES-NI, Smart Cache.
 * 28xx models support single- and dual-processor configurations, 48xx models support up to four-processor configurations, 88xx models support up to eight-processor configurations.
 * Transistors: 2.6 billion
 * Die size: 513 mm²
 * Steppings: A2