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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 2.3 GHz More than 30% higher clock speed
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
Much better overclocked clock speed (Air) 3.83 GHz vs 2.43 GHz Around 60% better overclocked clock speed (Air)
Newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better overclocked clock speed (Water) 4.1 GHz vs 2.3 GHz Around 80% better overclocked clock speed (Water)
Front view of AMD Opteron 8356

Reasons to consider the
AMD Opteron 8356

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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 8356

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon E5450
6,390
Opteron 8356
13,936

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon E5450
1,619
Opteron 8356
977.5

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E5450
128,600 MB/s
Opteron 8356
79.5 MB/s

Specifications Full list of technical specs

summary

Xeon E5450  vs
Opteron 8356 
Clock speed 3 GHz 2.3 GHz
Cores Quad core Quad core
Socket type
LGA 771
F

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
SSE4.1
3DNow!
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 80W 75W
Annual home energy cost 19.27 $/year 18.07 $/year
Annual commercial energy cost 70.08 $/year 65.7 $/year
Performance per watt 2.1 pt/W 2.16 pt/W
Typical power consumption 65W 60.94W

details

Xeon E5450  vs
Opteron 8356 
Threads 4 4
L2 cache 12 MB 2 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 65 nm
Max CPUs 2 8
Clock multiplier 9 11
Voltage range 0.85 - 1.35V 1 - UnknownV
Operating temperature Unknown - 67°C 0 - 55°C

overclocking

Overclocked clock speed 3.83 GHz 2.43 GHz
Overclocked clock speed (Water) 4.1 GHz 2.3 GHz
Overclocked clock speed (Air) 3.83 GHz 2.43 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

Clock speed 1,333 MHz 1,000 MHz
Intel Xeon E5450
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AMD Opteron 8356
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