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Differences What are the advantages of each

Front view of Intel Xeon X5450

Reasons to consider the
Intel Xeon X5450

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Much more l2 cache 12 MB vs 4 MB 3x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 3 MB/core vs 1 MB/core 3x more l2 cache per core
Higher clock speed 3 GHz vs 2.66 GHz Around 15% higher clock speed
Much lower typical power consumption 97.5W vs 135.97W Around 30% lower typical power consumption
Significantly better geekbench 3 Multi-Core score 7,850 vs 5,035 More than 55% better geekbench 3 Multi-Core score
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual home energy cost 28.91 $/year vs 51.39 $/year Around 45% lower annual home energy cost
Better overclocked clock speed (Air) 4.07 GHz vs 3.48 GHz More than 15% better overclocked clock speed (Air)
Slightly better PassMark (Single core) score 1,263 vs 1,126 More than 10% better PassMark (Single core) score
Significantly lower annual commercial energy cost 105.12 $/year vs 130.79 $/year Around 20% lower annual commercial energy cost
Front view of Intel Core2 Quad Q8400

Reasons to consider the
Intel Core2 Quad Q8400

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Much better performance per dollar 0.79 pt/$ vs 0.19 pt/$ More than 4x better performance per dollar
Higher Maximum operating temperature 71.4 °C vs 63 °C Around 15% higher Maximum operating temperature
Newer Apr, 2009 vs Nov, 2007 Release date over 1 years later
Significantly better overclocked clock speed (Water) 3.91 GHz vs 3 GHz More than 30% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon X5450 vs Core2 Quad Q8400

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 X5450
127,150 MB/s
Core2 Quad Q8400
113,900 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon X5450  vs
Core2 Quad Q8400 
Clock speed 3 GHz 2.66 GHz
Cores Quad core Quad core
Socket type
LGA 771
LGA 775

features

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

power consumption

TDP 120W 95W
Annual home energy cost 28.91 $/year 51.39 $/year
Annual commercial energy cost 105.12 $/year 130.79 $/year
Performance per watt 1.46 pt/W 0.94 pt/W
Typical power consumption 97.5W 135.97W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 1,333 MHz

details

Xeon X5450  vs
Core2 Quad Q8400 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 12 MB 4 MB
L2 cache per core 3 MB/core 1 MB/core
Manufacture process 45 nm 45 nm
Transistor count 820,000,000 456,000,000
Max CPUs 2 1
Clock multiplier 9 8
Voltage range 0.85 - 1.35V 0.85 - 1.36V
Operating temperature Unknown - 63°C Unknown - 71.4°C

overclocking

Overclocked clock speed 4.07 GHz 3.48 GHz
Overclocked clock speed (Water) 3 GHz 3.91 GHz
Overclocked clock speed (Air) 4.07 GHz 3.48 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
Intel Xeon X5450
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Intel Core2 Quad Q8400
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