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Intel Xeon E5620

Front view of Intel Xeon E5620
Front view of Intel Atom E620

Intel Atom E620

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Differences What are the advantages of each

Front view of Intel Xeon E5620

Reasons to consider the
Intel Xeon E5620

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Much higher clock speed 2.4 GHz vs 0.6 GHz 4x 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
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running 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) 3.75 GHz vs 0.6 GHz More than 6.2x better overclocked clock speed (Air)
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
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) 4.33 GHz vs 0.6 GHz Around 7.2x better overclocked clock speed (Water)
Supports more RAM 294,912 MB vs 2,048 MB Supports 144x more RAM
Front view of Intel Atom E620

Reasons to consider the
Intel Atom E620

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 2.68W vs 65W 24.2x lower typical power consumption
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual home energy cost 0.79 $/year vs 19.27 $/year 24.2x lower annual home energy cost
Much lower annual commercial energy cost 2.89 $/year vs 70.08 $/year 24.2x lower annual commercial energy cost
Newer Sep, 2010 vs Mar, 2010 Release date 6 months later

Features Key features of the Xeon E5620  vs Atom E620 

clock speed

Xeon E5620
2.4 GHz
Atom E620
0.6 GHz

L2 cache

Xeon E5620
1 MB
Atom E620
0.5 MB

overclocked clock speed (air)

Xeon E5620
3.75 GHz
Atom E620
0.6 GHz

overclocked clock speed (water)

Xeon E5620
4.33 GHz
Atom E620
0.6 GHz

TDP

Xeon E5620
80W
Atom E620
3.3W

Specifications Full list of technical specs

summary

 Xeon E5620  vs
Atom E620 
Clock speed 2.4 GHz 0.6 GHz
Cores Quad core Single core

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

power consumption
TDP 80W 3.3W
Annual home energy cost 19.27 $/year 0.79 $/year
Annual commercial energy cost 70.08 $/year 2.89 $/year
Typical power consumption 65W 2.68W

bus
Architecture QPI FSB
Number of links 2 1
Clock speed 2,930 MHz 2,500 MHz

details

 Xeon E5620  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 32 nm 45 nm
Max CPUs 2 1
Clock multiplier 18 6
Voltage range 0.75 - 1.35V 0.75 - 0.9V

overclocking
Overclocked clock speed 3.75 GHz 0.6 GHz
Overclocked clock speed (Water) 4.33 GHz 0.6 GHz
Overclocked clock speed (Air) 3.75 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 294,912 MB 2,048 MB
Intel Xeon E5620
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Intel Atom E620
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