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Differences What are the advantages of each

Front view of Intel Xeon E7-8891 v2

Reasons to consider the
Intel Xeon E7-8891 v2

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Much more l3 cache 37.5 MB vs 20 MB Around 90% more l3 cache; more data can be stored in the l3 cache for quick access later
Much higher clock speed 3.2 GHz vs 2.6 GHz Around 25% higher clock speed
More l2 cache 2.5 MB vs 2 MB 25% more l2 cache; more data can be stored in the l2 cache for quick access later
More threads 20 vs 16 4 more threads
Supports more CPUs in SMP configuration 8 vs 2 6 supports more CPUs in SMP configuration
Much more l3 cache per core 3.75 MB/core vs 2.5 MB/core 50% more l3 cache per core
Newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Newer Feb, 2014 vs Mar, 2012 Release date over 1 years later
Front view of Intel Xeon E5-2689

Reasons to consider the
Intel Xeon E5-2689

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Much better performance per watt 10.97 pt/W vs 2.87 pt/W More than 3.8x better performance per watt
Significantly lower typical power consumption 93.44W vs 125.94W More than 25% lower typical power consumption
Significantly lower annual commercial energy cost 100.74 $/year vs 135.78 $/year More than 25% lower annual commercial energy cost
Significantly lower annual home energy cost 27.7 $/year vs 37.34 $/year More than 25% lower annual home energy cost

Benchmarks Real world tests of Xeon E7-8891 v2 vs E5-2689

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon E7-8891 v2
2,280 MB/s
Xeon E5-2689
2,360,000 MB/s

Specifications Full list of technical specs

summary

Xeon E7-8891 v2  vs
E5-2689 
Clock speed 3.2 GHz 2.6 GHz
Cores Deca core Octa core
Socket type
LGA 2011

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
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

details

Xeon E7-8891 v2  vs
E5-2689 
Threads 20 16
L2 cache 2.5 MB 2 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 37.5 MB 20 MB
L3 cache per core 3.75 MB/core 2.5 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 8 2

power consumption

TDP 155W 115W
Annual home energy cost 37.34 $/year 27.7 $/year
Annual commercial energy cost 135.78 $/year 100.74 $/year
Performance per watt 2.87 pt/W 10.97 pt/W
Typical power consumption 125.94W 93.44W

bus

Architecture QPI QPI
Number of links 3 2
Data rate 96,000 MB/s 64,000 MB/s
Transfer rate 8,000 MT/s 8,000 MT/s
Clock speed 4,000 MHz 4,000 MHz
Intel Xeon E7-8891 v2
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Intel Xeon E5-2689
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