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Differences What are the advantages of each

Front view of Intel Xeon L7445

Reasons to consider the
Intel Xeon L7445

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Much more l2 cache 12 MB vs 1 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 3 MB/core vs 0.25 MB/core 12x more l2 cache per core
Supports more CPUs in SMP configuration 32 vs 2 30 supports more CPUs in SMP configuration
Significantly lower typical power consumption 40.63W vs 65W Around 40% lower typical power consumption
Significantly lower annual commercial energy cost 43.8 $/year vs 70.08 $/year Around 40% lower annual commercial energy cost
Significantly lower annual home energy cost 12.04 $/year vs 19.27 $/year More than 35% lower annual home energy cost
Front view of Intel Xeon E5620

Reasons to consider the
Intel Xeon E5620

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Significantly higher clock speed 2.4 GHz vs 2.13 GHz Around 15% higher clock speed
Much better overclocked clock speed (Air) 3.75 GHz vs 2.13 GHz More than 75% better overclocked clock speed (Air)
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More threads 8 vs 4 Twice as many threads
Much better overclocked clock speed (Water) 4.33 GHz vs 2.13 GHz More than 2x better overclocked clock speed (Water)
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Newer Mar, 2010 vs Sep, 2008 Release date over 1 years later

Features Key features of the Xeon L7445  vs E5620 

clock speed

Xeon L7445
2.13 GHz
Xeon E5620
2.4 GHz

L2 cache

Xeon L7445
12 MB
Xeon E5620
1 MB

L3 cache

Xeon L7445
12 MB
Xeon E5620
12 MB

overclocked clock speed (air)

Xeon L7445
2.13 GHz
Xeon E5620
3.75 GHz

overclocked clock speed (water)

Xeon L7445
2.13 GHz
Xeon E5620
4.33 GHz

TDP

Specifications Full list of technical specs

summary

Xeon L7445  vs
E5620 
Clock speed 2.13 GHz 2.4 GHz
Cores Quad core Quad core
Socket type
604
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
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 50W 80W
Annual home energy cost 12.04 $/year 19.27 $/year
Annual commercial energy cost 43.8 $/year 70.08 $/year
Typical power consumption 40.63W 65W

bus

Architecture FSB QPI
Number of links 1 2
Clock speed 1,066 MHz 2,930 MHz

details

Xeon L7445  vs
E5620 
Architecture x86-64 x86-64
Threads 4 8
L2 cache 12 MB 1 MB
L2 cache per core 3 MB/core 0.25 MB/core
L3 cache 12 MB 12 MB
L3 cache per core 3 MB/core 3 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 32 2
Clock multiplier 8 18
Voltage range 0.9 - 1.45V 0.75 - 1.35V
Operating temperature Unknown - 65°C Unknown - 77.6°C

overclocking

Overclocked clock speed 2.13 GHz 3.75 GHz
Overclocked clock speed (Water) 2.13 GHz 4.33 GHz
Overclocked clock speed (Air) 2.13 GHz 3.75 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
Intel Xeon L7445
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Intel Xeon E5620
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