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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 2.4 GHz More than 25% 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 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 (Air) 3.83 GHz vs 2.56 GHz Around 50% better overclocked clock speed (Air)
More threads 4 vs 2 Twice as many threads
Much better overclocked clock speed (Water) 4.1 GHz vs 2.4 GHz More than 70% better overclocked clock speed (Water)
Newer Nov, 2007 vs Sep, 2005 Release date over 2 years later
Front view of AMD Opteron 880

Reasons to consider the
AMD Opteron 880

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

Benchmarks Real world tests of Xeon E5450 vs Opteron 880

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5450
6,390
Opteron 880
1,379

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5450
128,600 MB/s
Opteron 880
63,500 MB/s

Specifications Full list of technical specs

summary

Xeon E5450  vs
Opteron 880 
Clock speed 3 GHz 2.4 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 880 
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 12
Voltage range 0.85 - 1.35V 1 - UnknownV
Operating temperature Unknown - 67°C 0 - 67°C

overclocking

Overclocked clock speed 3.83 GHz 2.56 GHz
Overclocked clock speed (Water) 4.1 GHz 2.4 GHz
Overclocked clock speed (Air) 3.83 GHz 2.56 GHz

power consumption

TDP 80W 85W
Annual home energy cost 19.27 $/year 20.48 $/year
Annual commercial energy cost 70.08 $/year 74.46 $/year
Performance per watt 2.1 pt/W 0.84 pt/W
Typical power consumption 65W 69.06W
Intel Xeon E5450
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AMD Opteron 880
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