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Differences What are the advantages of each

Front view of Intel Xeon E5506

Reasons to consider the
Intel Xeon E5506

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Much lower typical power consumption 65W vs 112.55W More than 40% 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 19.27 $/year vs 41.29 $/year 2.1x lower annual home energy cost
Much lower annual commercial energy cost 70.08 $/year vs 110.03 $/year More than 35% lower annual commercial energy cost
Supports more RAM 147,456 MB vs 32,768 MB Supports 4.5x more RAM
Slightly higher Maximum operating temperature 76 °C vs 72.6 °C Around 5% higher Maximum operating temperature
Front view of Intel Core i5 2500K

Reasons to consider the
Intel Core i5 2500K

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Significantly higher clock speed 3.3 GHz vs 2.13 GHz Around 55% higher clock speed
Much better performance per dollar 4.1 pt/$ vs 0.61 pt/$ Around 6.8x better performance per dollar
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly better PassMark (Single core) score 1,863 vs 892 More than 2x better PassMark (Single core) score
Much better overclocked clock speed (Air) 4.98 GHz vs 3.21 GHz More than 55% better overclocked clock speed (Air)
Much better performance per watt 6.79 pt/W vs 1.73 pt/W Around 4x better performance per watt
Slightly more l3 cache 6 MB vs 4 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
Better PassMark score 6,383 vs 2,996 Around 2.2x better PassMark score
More l3 cache per core 1.5 MB/core vs 1 MB/core 50% more l3 cache per core
Newer Jan, 2011 vs Mar, 2009 Release date over 1 years later
Significantly better overclocked clock speed (Water) 4.88 GHz vs 3.55 GHz More than 35% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon E5506 vs Core i5 2500K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5506
91,600 MB/s
Core i5 2500K
2,530,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon E5506
4,572
Core i5 2500K
10,319

GeekBench (64-bit) Data courtesy Primate Labs

Xeon E5506
5,593
Core i5 2500K
11,186

GeekBench

Xeon E5506
5,593
Core i5 2500K
13,624

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon E5506  vs
Core i5 2500K 
Clock speed 2.13 GHz 3.3 GHz
Cores Quad core Quad core
Socket type
LGA 1366
LGA 1155

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 95W
Annual home energy cost 19.27 $/year 41.29 $/year
Annual commercial energy cost 70.08 $/year 110.03 $/year
Performance per watt 1.73 pt/W 6.79 pt/W
Typical power consumption 65W 112.55W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 19,200 MB/s 21,333.32 MB/s
Maximum memory size 147,456 MB 32,768 MB

details

Xeon E5506  vs
Core i5 2500K 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 4 MB 6 MB
L3 cache per core 1 MB/core 1.5 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 2 1
Clock multiplier 16 33
Voltage range 0.75 - 1.35V 1.2 - 1.5V
Operating temperature Unknown - 76°C 5 - 72.6°C

overclocking

Overclocked clock speed 3.21 GHz 4.98 GHz
Overclocked clock speed (Water) 3.55 GHz 4.88 GHz
Overclocked clock speed (Air) 3.21 GHz 4.98 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 3000
Latest DirectX N/A 10.1
Number of displays supported N/A 2
GPU clock speed N/A 850 MHz
Turbo clock speed N/A 1,100 MHz
3DMark06 N/A 5,275

bus

Architecture QPI DMI
Number of links 2 1
Transfer rate 4,800 MT/s 5,000 MT/s
Intel Xeon E5506
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Intel Core i5 2500K
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