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Differences What are the advantages of each

Front view of Intel Xeon E7-4809 v2

Reasons to consider the
Intel Xeon E7-4809 v2

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Supports more RAM 1,572,864 MB vs 786,432 MB Supports 2x more RAM
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration
Front view of Intel Xeon E5-2620 v3

Reasons to consider the
Intel Xeon E5-2620 v3

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Much higher clock speed 2.4 GHz vs 1.9 GHz More than 25% higher clock speed
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Significantly more l3 cache 15 MB vs 12 MB 25% more l3 cache; more data can be stored in the l3 cache for quick access later
Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed
Lower typical power consumption 69.06W vs 85.31W Around 20% lower typical power consumption
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Lower annual commercial energy cost 74.46 $/year vs 91.98 $/year Around 20% lower annual commercial energy cost
Lower annual home energy cost 20.48 $/year vs 25.29 $/year Around 20% lower annual home energy cost

Features Key features of the Xeon E7-4809 v2  vs E5-2620 v3 

clock speed

L3 cache

Specifications Full list of technical specs


Xeon E7-4809 v2  vs
E5-2620 v3 
Clock speed 1.9 GHz 2.4 GHz
Cores Hexa core Hexa core
Is unlocked No Yes


Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
AVX 2.0
Supports dynamic frequency scaling No Yes

memory controller

Memory controller Built-in Built-in
Memory type
Channels Quad Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 34,133.32 MB/s 6,400 MB/s
Maximum memory size 1,572,864 MB 786,432 MB


Xeon E7-4809 v2  vs
E5-2620 v3 
Architecture x86-64 x86-64
Threads 12 12
L3 cache 12 MB 15 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 4 2
Operating temperature Unknown - 68°C Unknown - 72.6°C

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

power consumption

TDP 105W 85W
Annual home energy cost 25.29 $/year 20.48 $/year
Annual commercial energy cost 91.98 $/year 74.46 $/year
Typical power consumption 85.31W 69.06W


Architecture QPI QPI
Number of links 3 2
Data rate 76,800 MB/s 64,000 MB/s
Transfer rate 6,400 MT/s 8,000 MT/s
Clock speed 3,200 MHz 4,000 MHz
Intel Xeon E7-4809 v2
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Intel Xeon E5-2620 v3
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