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Intel Xeon L5639

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Front view of Intel Xeon L5639

Differences What are the advantages of each

Front view of Intel Xeon L5639

Reasons to consider the
Intel Xeon L5639

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Much more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better PassMark score 7,021 vs 4,387 More than 60% better PassMark score
Much more l3 cache 12 MB vs 8 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 6 vs 4 2 more cores; run more applications at once
Much better performance per watt 11.16 pt/W vs 2.66 pt/W Around 4.2x better performance per watt
Much better performance per dollar 2.23 pt/$ vs 0.29 pt/$ Around 7.8x better performance per dollar
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More threads 12 vs 8 4 more threads
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Slightly better overclocked clock speed (Air) 3.46 GHz vs 3.42 GHz Almost the same
Front view of Intel Xeon L5520

Reasons to consider the
Intel Xeon L5520

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Higher clock speed 2.26 GHz vs 2.13 GHz More than 5% higher clock speed
Much better overclocked clock speed (Water) 4.08 GHz vs 2.13 GHz More than 90% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon L5639 vs L5520

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L5639
14,645
Xeon L5520
6,798

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon L5639
2,085
Xeon L5520
1,624

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L5639
1,390,000 MB/s
Xeon L5520
108,400 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon L5639
9,881
Xeon L5520
6,516

GeekBench (64-bit) Data courtesy Primate Labs

Xeon L5639
13,956
Xeon L5520
7,962

GeekBench

Xeon L5639
13,956
Xeon L5520
7,962

PassMark Data courtesy Passmark

Xeon L5639
7,021
Xeon L5520
4,387

PassMark (Single Core)

Xeon L5639
1,125
Xeon L5520
1,034

Specifications Full list of technical specs

summary

Xeon L5639  vs
L5520 
Clock speed 2.13 GHz 2.26 GHz
Cores Hexa core Quad core
Socket type
LGA 1366

features

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

bus

Architecture QPI QPI
Number of links 2 2
Data rate 46,928 MB/s 46,928 MB/s
Transfer rate 5,860 MT/s 5,860 MT/s
Clock speed 2,933 MHz 2,930 MHz

details

Xeon L5639  vs
L5520 
Threads 12 8
L2 cache 2 MB 1 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 2 2

overclocking

Overclocked clock speed 3.46 GHz 3.42 GHz
Overclocked clock speed (Water) 2.13 GHz 4.08 GHz
Overclocked clock speed (Air) 3.46 GHz 3.42 GHz

power consumption

TDP 60W 60W
Annual home energy cost 14.45 $/year 14.45 $/year
Annual commercial energy cost 52.56 $/year 52.56 $/year
Performance per watt 11.16 pt/W 2.66 pt/W
Typical power consumption 48.75W 48.75W
Intel Xeon L5639
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Intel Xeon L5520
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