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Differences What are the advantages of each

Front view of Intel Xeon L5518

Reasons to consider the
Intel Xeon L5518

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Much lower typical power consumption 48.75W vs 135.63W 2.8x lower typical power consumption
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 14.45 $/year vs 48.38 $/year 3.3x lower annual home energy cost
Significantly higher Maximum operating temperature 85 °C vs 67.9 °C More than 25% higher Maximum operating temperature
Much lower annual commercial energy cost 52.56 $/year vs 134.55 $/year 2.6x lower annual commercial energy cost
Newer Mar, 2009 vs Oct, 2008 Release date 6 months later
Front view of Intel Core i7 920

Reasons to consider the
Intel Core i7 920

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Higher clock speed 2.66 GHz vs 2.13 GHz Around 25% higher clock speed
Higher turbo clock speed 2.93 GHz vs 2.4 GHz More than 20% higher turbo clock speed
Better overclocked clock speed (Air) 4.22 GHz vs 3.71 GHz Around 15% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.24 GHz vs 2.13 GHz Around 2x better overclocked clock speed (Water)

Features Key features of the Xeon L5518  vs Core i7 920 

clock speed

Xeon L5518
2.13 GHz
Core i7 920
2.66 GHz

turbo clock speed

Xeon L5518
2.4 GHz
Core i7 920
2.93 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon L5518
3.71 GHz
Core i7 920
4.22 GHz

overclocked clock speed (water)

Xeon L5518
2.13 GHz
Core i7 920
4.24 GHz

Specifications Full list of technical specs

summary

Xeon L5518  vs
Core i7 920 
Clock speed 2.13 GHz 2.66 GHz
Turbo clock speed 2.4 GHz 2.93 GHz
Cores Quad core Quad core
Socket type
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 60W 130W
Annual home energy cost 14.45 $/year 48.38 $/year
Annual commercial energy cost 52.56 $/year 134.55 $/year
Typical power consumption 48.75W 135.63W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC Yes No
Maximum bandwidth 25,599.99 MB/s 25,599.99 MB/s

details

Xeon L5518  vs
Core i7 920 
Architecture x86-64 x86-64
Threads 8 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 45 nm
Transistor count 731,000,000 731,000,000
Max CPUs 2 1
Voltage range 0.75 - 1.35V 0.8 - 1.38V
Operating temperature Unknown - 85°C Unknown - 67.9°C

overclocking

Overclocked clock speed 3.71 GHz 4.22 GHz
Overclocked clock speed (Water) 2.13 GHz 4.24 GHz
PassMark (Overclocked) 1,531.9 3,419.4
Overclocked clock speed (Air) 3.71 GHz 4.22 GHz

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

bus

Architecture QPI QPI
Number of links 2 1
Data rate 46,880 MB/s 19,200 MB/s
Transfer rate 5,860 MT/s 4,800 MT/s
Clock speed 2,930 MHz 2,400 MHz
Intel Xeon L5518
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Intel Core i7 920
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