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Differences What are the advantages of each

Front view of Intel Xeon W3530

Reasons to consider the
Intel Xeon W3530

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Much higher clock speed 2.8 GHz vs 0.6 GHz Around 4.8x higher clock speed
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
More l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better overclocked clock speed (Air) 3.94 GHz vs 0.6 GHz More than 6.5x better overclocked clock speed (Air)
More cores 4 vs 1 3 more cores; run more applications at once
More threads 8 vs 2 6 more threads
Much better overclocked clock speed (Water) 4.72 GHz vs 0.6 GHz More than 7.8x better overclocked clock speed (Water)
Front view of Intel Atom E620

Reasons to consider the
Intel Atom E620

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Much lower typical power consumption 2.68W vs 105.63W 39.4x lower typical power consumption
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower annual home energy cost 0.79 $/year vs 31.32 $/year 39.4x lower annual home energy cost
Much lower annual commercial energy cost 2.89 $/year vs 113.88 $/year 39.4x lower annual commercial energy cost
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Newer Sep, 2010 vs Mar, 2010 Release date 6 months later

Features Key features of the Xeon W3530  vs Atom E620 

clock speed

Xeon W3530
2.8 GHz
Atom E620
0.6 GHz

L2 cache

Xeon W3530
1 MB
Atom E620
0.5 MB

overclocked clock speed (air)

Xeon W3530
3.94 GHz
Atom E620
0.6 GHz

overclocked clock speed (water)

Xeon W3530
4.72 GHz
Atom E620
0.6 GHz

TDP

Xeon W3530
130W
Atom E620
3.3W

Specifications Full list of technical specs

summary

Xeon W3530  vs
Atom E620 
Clock speed 2.8 GHz 0.6 GHz
Cores Quad core Single core

features

Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 3.3W
Annual home energy cost 31.32 $/year 0.79 $/year
Annual commercial energy cost 113.88 $/year 2.89 $/year
Typical power consumption 105.63W 2.68W

bus

Architecture QPI FSB
Number of links 1 1
Clock speed 2,400 MHz 2,500 MHz

details

Xeon W3530  vs
Atom E620 
Architecture x86-64 x86
Threads 8 2
L2 cache 1 MB 0.5 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1
Clock multiplier 21 6
Voltage range 0.8 - 1.38V 0.75 - 0.9V

overclocking

Overclocked clock speed 3.94 GHz 0.6 GHz
Overclocked clock speed (Water) 4.72 GHz 0.6 GHz
Overclocked clock speed (Air) 3.94 GHz 0.6 GHz

integrated graphics

GPU None GPU
Label N/A Integrated
GPU clock speed N/A 320 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3
DDR3-800
DDR2-800
DDR2
Channels Triple Channel Single Channel
Supports ECC Yes No
Maximum bandwidth 25,599.99 MB/s 6,400 MB/s
Maximum memory size 24,576 MB 2,048 MB
Intel Xeon W3530
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Intel Atom E620
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