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Differences What are the advantages of each

Front view of Intel Xeon L5520

Reasons to consider the
Intel Xeon L5520

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Significantly higher clock speed 2.26 GHz vs 2 GHz Around 15% higher clock speed
Much better overclocked clock speed (Air) 3.42 GHz vs 2.5 GHz More than 35% better overclocked clock speed (Air)
Significantly lower typical power consumption 48.75W vs 80.44W Around 40% lower typical power consumption
Much more l3 cache per core 2 MB/core vs 1 MB/core 2x more l3 cache per core
Much better overclocked clock speed (Water) 4.08 GHz vs 2.5 GHz Around 65% better overclocked clock speed (Water)
Significantly lower annual commercial energy cost 52.56 $/year vs 86.72 $/year Around 40% lower annual commercial energy cost
Significantly lower annual home energy cost 14.45 $/year vs 23.85 $/year Around 40% lower annual home energy cost
Front view of AMD Opteron 6370P

Reasons to consider the
AMD Opteron 6370P

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Much more l2 cache 16 MB vs 1 MB 16x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l3 cache 16 MB vs 8 MB 2x more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 16 vs 4 12 more cores; run more applications at once
More threads 16 vs 8 Twice as many threads
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Supports more CPUs in SMP configuration 4 vs 2 Twice as many CPUs in SMP configuration
Newer Jan, 2014 vs Mar, 2009 Release date over 4 years later

Features Key features of the Xeon L5520  vs Opteron 6370P 

clock speed

Xeon L5520
2.26 GHz

turbo clock speed

Xeon L5520
2.48 GHz
Opteron 6370P
2.5 GHz

L2 cache

L3 cache

overclocked clock speed (air)

Xeon L5520
3.42 GHz
Opteron 6370P
2.5 GHz

overclocked clock speed (water)

Xeon L5520
4.08 GHz
Opteron 6370P
2.5 GHz

Specifications Full list of technical specs

summary

Xeon L5520  vs
Opteron 6370P 
Clock speed 2.26 GHz 2 GHz
Turbo clock speed 2.48 GHz 2.5 GHz
Cores Quad core 16 core
Socket type
LGA 1366
G34

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
AVX
SSE3
SSE
ABM
BMI1
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 60W 99W
Annual home energy cost 14.45 $/year 23.85 $/year
Annual commercial energy cost 52.56 $/year 86.72 $/year
Typical power consumption 48.75W 80.44W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Quad Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 51,200 MB/s

details

Xeon L5520  vs
Opteron 6370P 
Architecture x86-64 x86-64
Threads 8 16
L2 cache 1 MB 16 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 8 MB 16 MB
L3 cache per core 2 MB/core 1 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 2 4
Clock multiplier 17 12
Operating temperature Unknown - 70°C Unknown - 69°C

overclocking

Overclocked clock speed 3.42 GHz 2.5 GHz
Overclocked clock speed (Water) 4.08 GHz 2.5 GHz
Overclocked clock speed (Air) 3.42 GHz 2.5 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

bus

Transfer rate 5,860 MT/s 6,400 MT/s
Clock speed 2,930 MHz 3,200 MHz
Intel Xeon L5520
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AMD Opteron 6370P
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