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Differences What are the advantages of each

Front view of Intel Xeon L5640

Reasons to consider the
Intel Xeon L5640

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Higher clock speed 2.26 GHz vs 2 GHz Around 15% higher clock speed
Slightly higher turbo clock speed 2.8 GHz vs 2.6 GHz Around 10% higher turbo clock speed
Much better overclocked clock speed (Air) 3.9 GHz vs 2 GHz More than 95% better overclocked clock speed (Air)
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Supports more RAM 294,912 MB vs 131,072 MB Supports 2.2x more RAM
Better overclocked clock speed (Water) 2.27 GHz vs 2 GHz Around 15% better overclocked clock speed (Water)
Front view of Intel Xeon D-1548

Reasons to consider the
Intel Xeon D-1548

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Much newer manufacturing process 14 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Newer Oct, 2015 vs Mar, 2010 Release date over 5 years later
Lower typical power consumption 36.56W vs 48.75W 25% lower typical power consumption
More cores 8 vs 6 2 more cores; run more applications at once
More threads 16 vs 12 4 more threads
Lower annual home energy cost 10.84 $/year vs 14.45 $/year 25% lower annual home energy cost
Lower annual commercial energy cost 39.42 $/year vs 52.56 $/year 25% lower annual commercial energy cost

Features Key features of the Xeon L5640  vs D-1548 

clock speed

Xeon L5640
2.26 GHz
Xeon D-1548
2 GHz

turbo clock speed

Xeon L5640
2.8 GHz
Xeon D-1548
2.6 GHz

overclocked clock speed (air)

Xeon L5640
3.9 GHz
Xeon D-1548
2 GHz

overclocked clock speed (water)

Xeon L5640
2.27 GHz
Xeon D-1548
2 GHz

TDP

Specifications Full list of technical specs

summary

Xeon L5640  vs
D-1548 
Clock speed 2.26 GHz 2 GHz
Turbo clock speed 2.8 GHz 2.6 GHz
Cores Hexa core Octa 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

power consumption

TDP 60W 45W
Annual home energy cost 14.45 $/year 10.84 $/year
Annual commercial energy cost 52.56 $/year 39.42 $/year
Typical power consumption 48.75W 36.56W

bus

Architecture QPI FSB
Number of links 2 1

details

Xeon L5640  vs
D-1548 
Architecture x86-64 x86-64
Threads 12 16
Manufacture process 32 nm 14 nm
Max CPUs 2 1

overclocking

Overclocked clock speed 3.9 GHz 2 GHz
Overclocked clock speed (Water) 2.27 GHz 2 GHz
Overclocked clock speed (Air) 3.9 GHz 2 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
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Dual Channel
Supports ECC Yes Yes
Maximum bandwidth 31,999.98 MB/s 12,800 MB/s
Maximum memory size 294,912 MB 131,072 MB
Intel Xeon L5640
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Intel Xeon D-1548
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