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Differences What are the advantages of each

Front view of Intel Xeon X5650

Reasons to consider the
Intel Xeon X5650

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Much higher clock speed 2.66 GHz vs 2 GHz Around 35% higher clock speed
Much higher turbo clock speed 3.06 GHz vs 2.1 GHz More than 45% higher turbo 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
Much better PassMark score 7,510 vs 5,202 Around 45% better PassMark score
More cores 6 vs 4 2 more cores; run more applications at once
Much better performance per watt 7.89 pt/W vs 3.35 pt/W More than 2.2x better performance per watt
Much better performance per dollar 1.44 pt/$ vs 0.38 pt/$ More than 3.8x better performance per dollar
More l3 cache 12 MB vs 10 MB 20% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 12 vs 8 4 more threads
More l2 cache per core 0.33 MB/core vs 0.25 MB/core Around 35% more l2 cache per core
Front view of Intel Xeon E5-2418L

Reasons to consider the
Intel Xeon E5-2418L

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Much lower typical power consumption 40.63W vs 77.19W More than 45% lower typical power consumption
Supports more RAM 393,216 MB vs 294,912 MB Supports around 35% more RAM
More l3 cache per core 2.5 MB/core vs 2 MB/core 25% more l3 cache per core
Much lower annual commercial energy cost 43.8 $/year vs 83.22 $/year More than 45% lower annual commercial energy cost
Much lower annual home energy cost 12.04 $/year vs 22.89 $/year More than 45% lower annual home energy cost
Newer May, 2012 vs Mar, 2010 Release date over 2 years later

Benchmarks Real world tests of Xeon X5650 vs E5-2418L

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Xeon X5650  vs
E5-2418L 
Clock speed 2.66 GHz 2 GHz
Turbo clock speed 3.06 GHz 2.1 GHz
Cores Hexa core Quad core

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 95W 50W
Annual home energy cost 22.89 $/year 12.04 $/year
Annual commercial energy cost 83.22 $/year 43.8 $/year
Performance per watt 7.89 pt/W 3.35 pt/W
Typical power consumption 77.19W 40.63W

bus

Architecture QPI QPI
Number of links 2 1
Data rate 51,200 MB/s 25,600 MB/s
Transfer rate 6,400 MT/s 6,400 MT/s
Clock speed 3,200 MHz 3,200 MHz

details

Xeon X5650  vs
E5-2418L 
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 10 MB
L3 cache per core 2 MB/core 2.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 2 2
Operating temperature Unknown - 81.3°C Unknown - 91°C

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

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 31,999.98 MB/s
Maximum memory size 294,912 MB 393,216 MB
Intel Xeon X5650
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Intel Xeon E5-2418L
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