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Differences What are the advantages of each

Front view of Intel Xeon E5450

Reasons to consider the
Intel Xeon E5450

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Much more l2 cache 12 MB vs 2 MB 6x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3 GHz vs 2.2 GHz More than 35% higher clock speed
Much more l2 cache per core 3 MB/core vs 1 MB/core 3x more l2 cache per core
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Air) 3.83 GHz vs 2.2 GHz Around 75% better overclocked clock speed (Air)
Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Water) 4.1 GHz vs 2.2 GHz More than 85% better overclocked clock speed (Water)
More threads 4 vs 2 Twice as many threads
Lower typical power consumption 65W vs 77.19W More than 15% lower typical power consumption
Newer Nov, 2007 vs Apr, 2005 Release date over 2 years later
Lower annual commercial energy cost 70.08 $/year vs 83.22 $/year More than 15% lower annual commercial energy cost
Lower annual home energy cost 19.27 $/year vs 22.89 $/year More than 15% lower annual home energy cost
Front view of AMD Opteron 875

Reasons to consider the
AMD Opteron 875

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Supports more CPUs in SMP configuration 8 vs 2 6 supports more CPUs in SMP configuration

Features Key features of the Xeon E5450  vs Opteron 875 

clock speed

Xeon E5450
3 GHz
Opteron 875
2.2 GHz

L2 cache

Xeon E5450
12 MB

overclocked clock speed (air)

Xeon E5450
3.83 GHz
Opteron 875
2.2 GHz

overclocked clock speed (water)

Xeon E5450
4.1 GHz
Opteron 875
2.2 GHz

TDP

Specifications Full list of technical specs

summary

Xeon E5450  vs
Opteron 875 
Clock speed 3 GHz 2.2 GHz
Cores Quad core Dual core
Socket type
LGA 771
940

features

Has a NX bit Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supports dynamic frequency scaling Yes Yes

details

Xeon E5450  vs
Opteron 875 
Threads 4 2
L2 cache 12 MB 2 MB
L2 cache per core 3 MB/core 1 MB/core
Manufacture process 45 nm 90 nm
Max CPUs 2 8
Clock multiplier 9 11
Voltage range 0.85 - 1.35V 1 - UnknownV
Operating temperature Unknown - 67°C 0 - 67°C

overclocking

Overclocked clock speed 3.83 GHz 2.2 GHz
Overclocked clock speed (Water) 4.1 GHz 2.2 GHz
PassMark (Overclocked) 2,962.7 1,218.6
Overclocked clock speed (Air) 3.83 GHz 2.2 GHz

power consumption

TDP 80W 95W
Annual home energy cost 19.27 $/year 22.89 $/year
Annual commercial energy cost 70.08 $/year 83.22 $/year
Typical power consumption 65W 77.19W
Intel Xeon E5450
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AMD Opteron 875
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