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Differences What are the advantages of each

Front view of Intel E7-8891V4

Reasons to consider the
Intel E7-8891V4

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Significantly higher clock speed 2.8 GHz vs 2 GHz Around 40% higher clock speed
Supports more CPUs in SMP configuration 8 vs 4 Twice as many CPUs in SMP configuration
Better overclocked clock speed (Air) 2.8 GHz vs 2 GHz Around 40% better overclocked clock speed (Air)
Higher Maximum operating temperature 79 °C vs 67 °C Around 20% higher Maximum operating temperature
Better overclocked clock speed (Water) 2.8 GHz vs 2 GHz Around 40% better overclocked clock speed (Water)
Front view of Intel E7-4820V4

Reasons to consider the
Intel E7-4820V4

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Much lower typical power consumption 93.44W vs 134.06W More than 30% lower typical power consumption
Much lower annual home energy cost 27.7 $/year vs 39.75 $/year More than 30% lower annual home energy cost
Much lower annual commercial energy cost 100.74 $/year vs 144.54 $/year More than 30% lower annual commercial energy cost

Features Key features of the E7-8891V4  vs E7-4820V4 

clock speed

E7-8891V4
2.8 GHz
E7-4820V4
2 GHz

overclocked clock speed (air)

E7-8891V4
2.8 GHz
E7-4820V4
2 GHz

overclocked clock speed (water)

E7-8891V4
2.8 GHz
E7-4820V4
2 GHz

TDP

E7-8891V4
165W
E7-4820V4
115W

Specifications Full list of technical specs

summary

E7-8891V4  vs
E7-4820V4 
Clock speed 2.8 GHz 2 GHz
Cores Deca core Deca core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 165W 115W
Annual home energy cost 39.75 $/year 27.7 $/year
Annual commercial energy cost 144.54 $/year 100.74 $/year
Typical power consumption 134.06W 93.44W

bus

Architecture FSB FSB
Number of links 3 3
Transfer rate 9,600 MT/s 6,400 MT/s

details

E7-8891V4  vs
E7-4820V4 
Architecture x86-64 x86-64
Threads 20 20
Manufacture process 14 nm 14 nm
Max CPUs 8 4
Operating temperature Unknown - 79°C Unknown - 67°C

overclocking

Overclocked clock speed 2.8 GHz 2 GHz
Overclocked clock speed (Water) 2.8 GHz 2 GHz
Overclocked clock speed (Air) 2.8 GHz 2 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

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 51,200 MB/s 42,666.64 MB/s
Maximum memory size 3,145,728 MB 3,145,728 MB
Intel E7-8891V4
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Intel E7-4820V4
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