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Differences What are the advantages of each

Front view of Intel Pentium E5800

Reasons to consider the
Intel Pentium E5800

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Significantly higher clock speed 3.2 GHz vs 2.66 GHz More than 20% higher clock speed
Much lower typical power consumption 52.81W vs 135.97W 2.6x lower typical power consumption
Much better performance per watt 2.02 pt/W vs 0.94 pt/W Around 2.2x better performance per watt
Much better overclocked clock speed (Air) 4.17 GHz vs 3.48 GHz More than 20% better overclocked clock speed (Air)
Much lower annual home energy cost 15.66 $/year vs 51.39 $/year 3.3x lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 130.79 $/year 2.3x lower annual commercial energy cost
Higher Maximum operating temperature 74.1 °C vs 71.4 °C Around 5% higher Maximum operating temperature
Significantly better overclocked clock speed (Water) 4.34 GHz vs 3.91 GHz More than 10% better overclocked clock speed (Water)
Newer Nov, 2010 vs Apr, 2009 Release date over 1 years later
Front view of Intel Core2 Quad Q8400

Reasons to consider the
Intel Core2 Quad Q8400

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More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads

Benchmarks Real world tests of Pentium E5800 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

Pentium E5800
134,800 MB/s
Core2 Quad Q8400
113,900 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Pentium E5800  vs
Core2 Quad Q8400 
Clock speed 3.2 GHz 2.66 GHz
Cores Dual core Quad core
Socket type
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 65W 95W
Annual home energy cost 15.66 $/year 51.39 $/year
Annual commercial energy cost 56.94 $/year 130.79 $/year
Performance per watt 2.02 pt/W 0.94 pt/W
Typical power consumption 52.81W 135.97W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 800 MHz 1,333 MHz

details

Pentium E5800  vs
Core2 Quad Q8400 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 2 MB 4 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 45 nm 45 nm
Transistor count 228,000,000 456,000,000
Max CPUs 1 1
Clock multiplier 16 8
Voltage range 0.85 - 1.36V 0.85 - 1.36V
Operating temperature Unknown - 74.1°C Unknown - 71.4°C

overclocking

Overclock popularity 5 29
Overclocked clock speed 4.17 GHz 3.48 GHz
Overclocked clock speed (Water) 4.34 GHz 3.91 GHz
Overclocked clock speed (Air) 4.17 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 Pentium E5800
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Intel Core2 Quad Q8400
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