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Differences What are the advantages of each

Front view of Intel E5-4620V4

Reasons to consider the
Intel E5-4620V4

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Much newer manufacturing process 14 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More threads 20 vs 2 18 more threads
More cores 10 vs 2 8 more cores; run more applications at once
Newer Apr, 2016 vs Jan, 2008 Release date over 8 years later
Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Significantly higher clock speed 3 GHz vs 2.1 GHz Around 45% higher clock speed
Much lower typical power consumption 52.81W vs 85.31W Around 40% lower typical power consumption
Much better overclocked clock speed (Air) 4.22 GHz vs 2.1 GHz More than 2x better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.23 GHz vs 2.1 GHz More than 2x better overclocked clock speed (Water)
Much lower annual home energy cost 15.66 $/year vs 25.29 $/year Around 40% lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 91.98 $/year Around 40% lower annual commercial energy cost

Features Key features of the E5-4620V4  vs Core2 Duo E8400 

clock speed

E5-4620V4
2.1 GHz

overclocked clock speed (air)

E5-4620V4
2.1 GHz
Core2 Duo E8400
4.22 GHz

overclocked clock speed (water)

E5-4620V4
2.1 GHz
Core2 Duo E8400
4.23 GHz

TDP

Specifications Full list of technical specs

summary

E5-4620V4  vs
Core2 Duo E8400 
Clock speed 2.1 GHz 3 GHz
Cores Deca core Dual core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
AVX
SSE3
SSE
SSE4.1
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 105W 65W
Annual home energy cost 25.29 $/year 15.66 $/year
Annual commercial energy cost 91.98 $/year 56.94 $/year
Typical power consumption 85.31W 52.81W

details

E5-4620V4  vs
Core2 Duo E8400 
Architecture x86-64 x86-64
Threads 20 2
Manufacture process 14 nm 45 nm
Max CPUs 4 1

overclocking

Overclocked clock speed 2.1 GHz 4.22 GHz
Overclocked clock speed (Water) 2.1 GHz 4.23 GHz
Overclocked clock speed (Air) 2.1 GHz 4.22 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

Architecture FSB FSB
Number of links 2 1
Intel E5-4620V4
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Intel Core2 Duo E8400
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