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Differences What are the advantages of each

Front view of Intel Xeon L5640

Reasons to consider the
Intel Xeon L5640

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Much higher turbo clock speed 2.8 GHz vs 1.86 GHz More than 50% higher turbo clock speed
Much higher clock speed 2.26 GHz vs 1.86 GHz More than 20% higher clock speed
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
More cores 6 vs 4 2 more cores; run more applications at once
Much better performance per watt 10.46 pt/W vs 3.43 pt/W More than 3x better performance per watt
More threads 12 vs 4 Three times as many threads
Much better overclocked clock speed (Air) 3.9 GHz vs 2.83 GHz Around 40% better overclocked clock speed (Air)
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Much better overclocked clock speed (Water) 2.27 GHz vs 1.87 GHz More than 20% better overclocked clock speed (Water)
Front view of Intel Xeon L5609

Reasons to consider the
Intel Xeon L5609

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Much more l3 cache per core 3 MB/core vs 2 MB/core 50% more l3 cache per core
Lower typical power consumption 32.5W vs 48.75W Around 35% lower typical power consumption
Lower annual commercial energy cost 35.04 $/year vs 52.56 $/year Around 35% lower annual commercial energy cost
Lower annual home energy cost 9.64 $/year vs 14.45 $/year Around 35% lower annual home energy cost

Benchmarks Real world tests of Xeon L5640 vs L5609

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon L5640
16,852
Xeon L5609
7,865

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon L5640
1,918
Xeon L5609
2,423

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon L5640
1,250,000 MB/s
Xeon L5609
1,510 MB/s

Specifications Full list of technical specs

summary

Xeon L5640  vs
L5609 
Clock speed 2.26 GHz 1.86 GHz
Turbo clock speed 2.8 GHz 1.86 GHz
Cores Hexa core Quad core
Socket type
LGA 1366

features

Has a NX bit Yes Yes
Supports trusted computing Yes 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 60W 40W
Annual home energy cost 14.45 $/year 9.64 $/year
Annual commercial energy cost 52.56 $/year 35.04 $/year
Performance per watt 10.46 pt/W 3.43 pt/W
Typical power consumption 48.75W 32.5W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC Yes Yes
Maximum bandwidth 31,999.98 MB/s 25,599.99 MB/s
Maximum memory size 294,912 MB 294,912 MB

details

Xeon L5640  vs
L5609 
Architecture x86-64 x86-64
Threads 12 4
L2 cache 2 MB 1 MB
L2 cache per core 0.33 MB/core 0.25 MB/core
L3 cache 12 MB 12 MB
L3 cache per core 2 MB/core 3 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2
Clock multiplier 17 14
Voltage range 0.75 - 1.35V 0.75 - 1.35V
Operating temperature Unknown - 69.4°C Unknown - 63.1°C

overclocking

Overclocked clock speed 3.9 GHz 2.83 GHz
Overclocked clock speed (Water) 2.27 GHz 1.87 GHz
Overclocked clock speed (Air) 3.9 GHz 2.83 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

Architecture QPI QPI
Number of links 2 2
Data rate 46,928 MB/s 38,400 MB/s
Transfer rate 5,860 MT/s 4,800 MT/s
Clock speed 2,930 MHz 2,400 MHz
Intel Xeon L5640
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Intel Xeon L5609
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