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Differences What are the advantages of each

Front view of Intel Xeon W3520

Reasons to consider the
Intel Xeon W3520

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Significantly higher clock speed 2.66 GHz vs 1.8 GHz Around 50% higher clock speed
Higher turbo clock speed 2.93 GHz vs 2.5 GHz More than 15% higher turbo clock speed
Front view of Intel E5-2648LV4

Reasons to consider the
Intel E5-2648LV4

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Much more l3 cache 35 MB vs 8 MB Around 4.5x more l3 cache; more data can be stored in the l3 cache for quick access later
Much newer manufacturing process 14 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More cores 14 vs 4 10 more cores; run more applications at once
More threads 28 vs 8 20 more threads
Much lower typical power consumption 60.94W vs 105.63W More than 40% lower typical power consumption
Supports more RAM 1,572,864 MB vs 24,576 MB Supports 64x more RAM
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Newer Jan, 2016 vs Mar, 2009 Release date over 6 years later
Significantly higher Maximum operating temperature 87 °C vs 67.9 °C Around 30% higher Maximum operating temperature
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Much lower annual home energy cost 18.07 $/year vs 31.32 $/year More than 40% lower annual home energy cost
Much lower annual commercial energy cost 65.7 $/year vs 113.88 $/year More than 40% lower annual commercial energy cost

Features Key features of the Xeon W3520  vs E5-2648LV4 

clock speed

Xeon W3520
2.66 GHz
1.8 GHz

turbo clock speed

Xeon W3520
2.93 GHz
2.5 GHz

L3 cache

Xeon W3520
8 MB
35 MB


Specifications Full list of technical specs


Xeon W3520  vs
Clock speed 2.66 GHz 1.8 GHz
Turbo clock speed 2.93 GHz 2.5 GHz
Cores Quad core Processing Cores


Has a NX bit Yes Yes
Supports trusted computing No Yes
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
AVX 2.0
Supports dynamic frequency scaling Yes Yes

memory controller

Memory controller Built-in Built-in
Channels Triple Channel Quad Channel
Supports ECC Yes Yes
Maximum memory size 24,576 MB 1,572,864 MB


Xeon W3520  vs
Architecture x86-64 x86-64
Threads 8 28
L3 cache 8 MB 35 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 45 nm 14 nm
Max CPUs 1 2
Operating temperature Unknown - 67.9°C Unknown - 87°C

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

power consumption

TDP 130W 75W
Annual home energy cost 31.32 $/year 18.07 $/year
Annual commercial energy cost 113.88 $/year 65.7 $/year
Typical power consumption 105.63W 60.94W


Architecture QPI QPI
Number of links 1 2
Data rate 19,200 MB/s 76,800 MB/s
Transfer rate 4,800 MT/s 9,600 MT/s
Clock speed 2,400 MHz 4,800 MHz
Intel Xeon W3520
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Intel E5-2648LV4
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