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Differences What are the advantages of each

Front view of Intel Xeon D-1521

Reasons to consider the
Intel Xeon D-1521

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Supports more RAM 131,072 MB vs 65,536 MB Supports 2x more RAM
Front view of Intel E3-1565LV5

Reasons to consider the
Intel E3-1565LV5

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Higher turbo clock speed 3.5 GHz vs 2.7 GHz Around 30% higher turbo clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Lower typical power consumption 28.44W vs 36.56W More than 20% lower typical power consumption
Newer Apr, 2016 vs Oct, 2015 Release date 6 months later
Lower annual home energy cost 8.43 $/year vs 10.84 $/year More than 20% lower annual home energy cost
Lower annual commercial energy cost 30.66 $/year vs 39.42 $/year More than 20% lower annual commercial energy cost

Features Key features of the Xeon D-1521  vs E3-1565LV5 

clock speed

Xeon D-1521
2.4 GHz
E3-1565LV5
2.5 GHz

turbo clock speed

Xeon D-1521
2.7 GHz
E3-1565LV5
3.5 GHz

TDP

Specifications Full list of technical specs

summary

Xeon D-1521  vs
E3-1565LV5 
Clock speed 2.4 GHz 2.5 GHz
Turbo clock speed 2.7 GHz 3.5 GHz
Cores Quad core Quad core

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

memory controller

Memory controller Built-in Built-in
Memory type
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 12,800 MB/s 12,800 MB/s
Maximum memory size 131,072 MB 65,536 MB

details

Xeon D-1521  vs
E3-1565LV5 
Architecture x86-64 x86-64
Threads 8 8
Manufacture process 14 nm 14 nm
Max CPUs 1 1

integrated graphics

GPU None GPU
Label N/A Intel® Iris™ Pro Graphics P580
Number of displays supported N/A 3
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 1,050 MHz

power consumption

TDP 45W 35W
Annual home energy cost 10.84 $/year 8.43 $/year
Annual commercial energy cost 39.42 $/year 30.66 $/year
Typical power consumption 36.56W 28.44W

bus

Architecture FSB FSB
Number of links 1 0
Intel Xeon D-1521
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Intel E3-1565LV5
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