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Differences What are the advantages of each

Front view of Intel Xeon EC5549

Reasons to consider the
Intel Xeon EC5549

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Much lower typical power consumption 69.06W vs 212W 3.1x lower typical power consumption
Much lower annual home energy cost 20.48 $/year vs 82.69 $/year 4x lower annual home energy cost
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual commercial energy cost 74.46 $/year vs 211.12 $/year 2.8x lower annual commercial energy cost
Higher Maximum operating temperature 77.6 °C vs 67.9 °C Around 15% higher Maximum operating temperature
Newer Feb, 2010 vs Jun, 2009 Release date 8 months later
Front view of Intel Core i7 975

Reasons to consider the
Intel Core i7 975

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Significantly higher clock speed 3.33 GHz vs 2.53 GHz More than 30% higher clock speed
Higher turbo clock speed 3.6 GHz vs 2.93 GHz Around 25% higher turbo clock speed

Features Key features of the Xeon EC5549  vs Core i7 975 

clock speed

Xeon EC5549
2.53 GHz
Core i7 975
3.33 GHz

turbo clock speed

Xeon EC5549
2.93 GHz
Core i7 975
3.6 GHz

L2 cache

L3 cache

TDP

Specifications Full list of technical specs

summary

Xeon EC5549  vs
Core i7 975 
Clock speed 2.53 GHz 3.33 GHz
Turbo clock speed 2.93 GHz 3.6 GHz
Cores Quad core Quad core
Socket type
LGA 1366

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 85W 130W
Annual home energy cost 20.48 $/year 82.69 $/year
Annual commercial energy cost 74.46 $/year 211.12 $/year
Typical power consumption 69.06W 212W

bus

Architecture QPI QPI
Number of links 1 1
Data rate 23,480 MB/s 25,600 MB/s
Transfer rate 5,870 MT/s 6,400 MT/s
Clock speed 2,935 MHz 3,200 MHz

details

Xeon EC5549  vs
Core i7 975 
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
Max CPUs 2 1
Voltage range 1 - 1.5V 0.8 - 1.38V
Operating temperature Unknown - 77.6°C 5 - 67.9°C

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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3
DDR3-800
Channels Triple Channel Triple Channel
Supports ECC Yes No
Maximum bandwidth 19,200 MB/s 25,599.99 MB/s
Intel Xeon EC5549
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Intel Core i7 975
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