Address width	Up to 64 bits
Application	DP/MP Server
Brand name	Xeon 55xx
Brand names	Xeon 65xx (DP)Xeon 75xx (MP)
Co-processor	Xeon Phi (2010–2020)
Common manufacturer	Intel
CPUID code	206Ex
Data width	Up to 64 bits
Designed by	Intel
Discontinued	Q4 2012
DMI speeds	2.0 GT/s to 16 GT/s
Extensions	SGX, SHA, TXT, VT-x, VT-d
FSB speeds	1066 MT/s
GPU	Intel Graphics Technology (some models only)
Instruction set	x86-16, IA-32, x86-64
Instructions	MMX, SSE, SSE2, SSE3, SSSE3, SSE4, SSE4.1, SSE4.2, AVX, AVX2, FMA3, AVX-512, AVX-VNNI, AMX, TSX, AES-NI, CLMUL, RDRAND
L1 cache	6 × 96 KB
L2 cache	256 KB per core
L3 cache	Up to 24 MB
L4 cache	Up to 64 GB HBM2e
Launched	March 30, 2010; 16 years ago (2010-03-30)
Marketed by	Intel
Max. CPU clock rate	1.733 GHz to 2.667 GHz
Memory (RAM)	Up to 4 TB and 8 channels per socketUp to DDR5-5600 with ECC support
Microarchitecture	Nehalem
Package	LGA 1567
Predecessor	Dempsey
QPI speeds	6.4 GT/s
Socket	LGA 771
Successor	Wolfdale-DP
Technology node	45 nm
Variant	Itanium (2001–2020)
Variants	Clovertown, Tigerton
Virtual address width	Up to 57 bits

Xeon

Key specifications