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Differences What are the advantages of each

Front view of Intel Xeon Phi 7120D

Reasons to consider the
Intel Xeon Phi 7120D

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Much more l2 cache 30.5 MB vs 1 MB 30.5x more l2 cache; more data can be stored in the l2 cache for quick access later
More threads 244 vs 8 236 more threads
Supports more CPUs in SMP configuration 8 vs 2 6 supports more CPUs in SMP configuration
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Newer Jan, 2014 vs Mar, 2010 Release date over 3 years later
Front view of Intel Xeon E5620

Reasons to consider the
Intel Xeon E5620

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Much higher clock speed 2.4 GHz vs 1.24 GHz Around 95% higher clock speed
Much higher turbo clock speed 2.66 GHz vs 1.33 GHz Around 2x higher turbo clock speed
Much lower typical power consumption 65W vs 219.38W 3.4x lower typical power consumption
Much better overclocked clock speed (Air) 3.75 GHz vs 1.24 GHz More than 3x better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much better overclocked clock speed (Water) 4.33 GHz vs 1.24 GHz More than 3.5x better overclocked clock speed (Water)
Much lower annual commercial energy cost 70.08 $/year vs 236.52 $/year 3.4x lower annual commercial energy cost
Much lower annual home energy cost 19.27 $/year vs 65.04 $/year 3.4x lower annual home energy cost

Features Key features of the Xeon Phi 7120D  vs E5620 

clock speed

Xeon Phi 7120D
1.24 GHz
Xeon E5620
2.4 GHz

turbo clock speed

Xeon Phi 7120D
1.33 GHz
Xeon E5620
2.66 GHz

L2 cache

Xeon Phi 7120D
30.5 MB
Xeon E5620
1 MB

overclocked clock speed (air)

Xeon Phi 7120D
1.24 GHz
Xeon E5620
3.75 GHz

overclocked clock speed (water)

Xeon Phi 7120D
1.24 GHz
Xeon E5620
4.33 GHz

TDP

Specifications Full list of technical specs

summary

Xeon Phi 7120D  vs
E5620 
Clock speed 1.24 GHz 2.4 GHz
Turbo clock speed 1.33 GHz 2.66 GHz
Cores 61 cores Quad core
Socket type
PCI Express x24
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
Has virtualization support No Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
FMA3
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 270W 80W
Annual home energy cost 65.04 $/year 19.27 $/year
Annual commercial energy cost 236.52 $/year 70.08 $/year
Typical power consumption 219.38W 65W

details

Xeon Phi 7120D  vs
E5620 
Architecture x86-64 x86-64
Threads 244 8
L2 cache 30.5 MB 1 MB
Manufacture process 22 nm 32 nm
Max CPUs 8 2

overclocking

Overclocked clock speed 1.24 GHz 3.75 GHz
Overclocked clock speed (Water) 1.24 GHz 4.33 GHz
Overclocked clock speed (Air) 1.24 GHz 3.75 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
DDR3-1066
DDR3-800
DDR3
GDDR5
Channels Dual Channel Triple Channel
Supports ECC Yes Yes
Intel Xeon Phi 7120D
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Intel Xeon E5620
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