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Pentium II Xeon

Intel Xeon
Intel xeon inside.jpg
Produced From 1998 to present
Common manufacturer(s)
  • Intel
Max. CPU clock rate 1.2 GHz to 4.4 GHz
FSB speeds 600 MHz to 8.0 GT/s
Instruction set x86-64
Microarchitecture Skylake, Broadwell, Haswell, Ivy Bridge, Sandy Bridge, Nehalem, Core, NetBurst, P6
Cores Up to 88, over 200
when used with dual Xeon Phi co-processors
Socket(s)
Gallatin
Xeon DP Gallatin (SL7AE), Socket 604.jpg
Produced From March 2003 to 2004
Max. CPU clock rate 1.5 GHz to 3.2 GHz
FSB speeds 400 MT/s to 533 MT/s
Min. feature size 130 nm
Instruction set x86
Microarchitecture NetBurst
CPUID code 0F7x
Product code 80537
Cores 1
L1 cache 8 kB + 12 kuOps trace cache
L2 cache 512 kB
L3 cache 1 MB, 2 MB, 4 MB
Application DP and MP Server
Package(s)
Brand name(s)
  • Xeon
Paxville
Produced From October 2005 to August 2008
Max. CPU clock rate 2667 MHz to 3000 MHz
FSB speeds 667 MT/s to 800 MT/s
Min. feature size 90 nm
Instruction set x86
Microarchitecture NetBurst
CPUID code 0F48
Product code 80551, 80560
Cores 2
L2 cache 2×2 MB
Application DP Server, MP Server
Package(s)
Brand name(s)
  • Xeon
Tulsa
Produced From August 2006 to August 2008
Max. CPU clock rate 2.5 GHz to 3.5 GHz
FSB speeds 667 MT/s to 800 MT/s
Min. feature size 65 nm
Instruction set x86
Microarchitecture NetBurst
CPUID code 0F68
Product code 80550
Cores 2
L2 cache 2×1 MB
L3 cache 16 MB
Application MP Server
Package(s)
Brand name(s)
  • Xeon 71xx
Dempsey
Produced From May 2006 to August 2008
Max. CPU clock rate 2.5 GHz to 3.73 GHz
FSB speeds 667 MT/s to 1066 MT/s
Min. feature size 65nm
Instruction set x86
Microarchitecture NetBurst
Cores 2
L2 cache 4 MB
Application DP Server
Package(s)
Brand name(s)
  • Xeon 50xx
Sossaman
2.00 GHz Xeon LV Sossaman processor.jpg
Produced From 2006 to 2008
Max. CPU clock rate 1667 MHz to 2167 MHz
FSB speeds 667 MT/s
Min. feature size 65 nm
Instruction set x86
Microarchitecture Enhanced Pentium M
CPUID code 06Ex
Product code 80539
Cores 2
L2 cache 2 MB
Application DP Server
Package(s)
Brand name(s)
  • Xeon
Woodcrest
Intel Xeon DP 5110 Woodcrest.jpeg
Produced From 2006 to 2009
Max. CPU clock rate 1.6 GHz to 3.0 GHz
FSB speeds 1066 MT/s to 1333 MT/s
Min. feature size 65nm
Instruction set x86
Microarchitecture Core
CPUID code 06Fx
Product code 80556
Cores 2
L2 cache 4 MB
Application DP Server
Package(s)
Brand name(s)
  • Xeon 51xx
Wolfdale-DP
Produced From 2007 to present
Max. CPU clock rate 1866 MHz to 3500 MHz
FSB speeds 1066 MT/s to 1600 MT/s
Min. feature size 45 nm
Instruction set x86
Microarchitecture Penryn
CPUID code 1067x
Product code 80573
Cores 2
L2 cache 6 MB
Application DP Server
Package(s)
Brand name(s)
  • Xeon 52xx
Clovertown
Xeon X5355 Clovertown.jpg
Produced From 2006 to present
Max. CPU clock rate 1600 MHz to 3000 MHz
FSB speeds 1066 MT/s to 1333 
Min. feature size 65 nm
Instruction set x86
Microarchitecture Core
CPUID code 06Fx
Product code 80574
Cores 4
L2 cache 2×4 MB
Application DP Server
Package(s)
Brand name(s)
  • Xeon 53xx
Harpertown
Produced From 2007 to present
Max. CPU clock rate 2000 MHz to 3400 MHz
FSB speeds 1066 MT/s to 1600 
Min. feature size 45 nm
Instruction set x86
Microarchitecture Penryn
CPUID code 1067x
Product code 80574
Cores 4
L2 cache 2 × 6 MB
Application DP Server
Package(s)
Brand name(s)

The Xeon /ˈzɒn/ is a brand of x86 microprocessors designed, manufactured, and marketed by Intel Corporation, targeted at the non-consumer workstation, server, and embedded system markets. The primary advantages of the Xeon CPUs, when compared to the majority of Intel's desktop-grade consumer CPUs, are their multi-socket capabilities, higher core counts, and support for ECC memory. A Xeon Phi co-processor, or co-processors, can be used alongside an existing Intel Xeon processor to provide increased/improved computing power, requiring an available PCI Express 3.0 x16 slot in x16, or x8 mode.

Disadvantages that make Xeon processors unsuitable for most consumer-grade desktop PCs include lower clock rates at the same price point (since servers run more tasks in parallel than desktops, so core counts become more important than clock rates), absence of an integrated GPU, and non-existent support for overclocking. Despite such disadvantages, Xeon processors have always had popularity among desktop users, (primarily gamers, and extreme users) mainly due to higher core count potential, and lower price to performance ratio vs. the Core i7. Because most Intel Xeon CPUs lack an integrated GPU, systems built with such integrated GPU lacking processors require a discrete graphics card if a VDU output is desired.


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