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Differences What are the advantages of each

Front view of Intel Xeon Phi 7120P

Reasons to consider the
Intel Xeon Phi 7120P

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Much more l2 cache 30.5 MB vs 3 MB Around 10.2x more l2 cache; more data can be stored in the l2 cache for quick access later
More threads 244 vs 20 224 more threads
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Newer Jun, 2013 vs Apr, 2011 Release date over 2 years later
Front view of Intel Xeon E7-8870

Reasons to consider the
Intel Xeon E7-8870

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Supports more RAM 4,194,304 MB vs 16,384 MB Supports 256x more RAM
Much higher clock speed 2.4 GHz vs 1.24 GHz Around 95% higher clock speed
Much higher turbo clock speed 2.8 GHz vs 1.33 GHz More than 2x higher turbo clock speed
Much lower typical power consumption 105.63W vs 243.75W 2.3x lower typical power consumption
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
Much better overclocked clock speed (Air) 2.51 GHz vs 1.24 GHz More than 2x 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 lower annual commercial energy cost 113.88 $/year vs 262.8 $/year 2.3x lower annual commercial energy cost
Much lower annual home energy cost 31.32 $/year vs 72.27 $/year 2.3x lower annual home energy cost
Much better overclocked clock speed (Water) 2.4 GHz vs 1.24 GHz Around 95% better overclocked clock speed (Water)

Features Key features of the Xeon Phi 7120P  vs E7-8870 

clock speed

Xeon Phi 7120P
1.24 GHz
Xeon E7-8870
2.4 GHz

turbo clock speed

Xeon Phi 7120P
1.33 GHz
Xeon E7-8870
2.8 GHz

L2 cache

overclocked clock speed (air)

Xeon Phi 7120P
1.24 GHz
Xeon E7-8870
2.51 GHz

overclocked clock speed (water)

Xeon Phi 7120P
1.24 GHz
Xeon E7-8870
2.4 GHz

Specifications Full list of technical specs

summary

Xeon Phi 7120P  vs
E7-8870 
Clock speed 1.24 GHz 2.4 GHz
Turbo clock speed 1.33 GHz 2.8 GHz
Cores 61 cores Deca core
Socket type
PCI Express x16
LGA 1567

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 No Yes

power consumption

TDP 300W 130W
Annual home energy cost 72.27 $/year 31.32 $/year
Annual commercial energy cost 262.8 $/year 113.88 $/year
Typical power consumption 243.75W 105.63W

bus

Architecture FSB QPI
Number of links 1 1

details

Xeon Phi 7120P  vs
E7-8870 
Architecture x86-64 x86-64
Threads 244 20
L2 cache 30.5 MB 3 MB
Manufacture process 22 nm 32 nm
Max CPUs 8 8

overclocking

Overclocked clock speed 1.24 GHz 2.51 GHz
Overclocked clock speed (Water) 1.24 GHz 2.4 GHz
Overclocked clock speed (Air) 1.24 GHz 2.51 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
DDR
GDDR5
Channels Dual Channel Quad Channel
Supports ECC Yes Yes
Maximum memory size 16,384 MB 4,194,304 MB
Intel Xeon Phi 7120P
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Intel Xeon E7-8870
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