Pentium II Xeon

Intel Xeon

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)	LGA 2011-3 (Socket C) LGA 2011 (Socket R) LGA 1150 LGA 1366 (Socket B)

Gallatin

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)	Socket 603 Socket 604
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)	LGA 771, Socket 604
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)	Socket 604
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)	LGA 771
Brand name(s)	Xeon 50xx

Sossaman

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)	Socket M
Brand name(s)	Xeon

Woodcrest

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)	LGA 771
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)	LGA 771
Brand name(s)	Xeon 52xx

Clovertown

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)	LGA 771
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)	LGA 771
Brand name(s)	Xeon 54xx Core 2 Quad QX9775

The Xeon /ˈziːɒn/ 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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