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Differences What are the advantages of each

Front view of Intel Xeon W3520

Reasons to consider the
Intel Xeon W3520

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Higher clock speed 2.66 GHz vs 2.53 GHz More than 5% higher clock speed
Higher turbo clock speed 2.93 GHz vs 2.8 GHz Around 5% higher turbo clock speed
Much better overclocked clock speed (Air) 4.38 GHz vs 4.02 GHz Around 10% better overclocked clock speed (Air)
Front view of Intel Xeon E5630

Reasons to consider the
Intel Xeon E5630

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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
Much better performance per watt 7.2 pt/W vs 1.38 pt/W Around 5.2x better performance per watt
Much better performance per dollar 1.65 pt/$ vs 0.59 pt/$ More than 2.8x better performance per dollar
Supports more RAM 294,912 MB vs 24,576 MB Supports 12x more RAM
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much lower typical power consumption 65W vs 105.63W Around 40% lower typical power consumption
Newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much more l3 cache per core 3 MB/core vs 2 MB/core 50% more l3 cache per core
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Much lower annual commercial energy cost 70.08 $/year vs 113.88 $/year Around 40% lower annual commercial energy cost
Much lower annual home energy cost 19.27 $/year vs 31.32 $/year Around 40% lower annual home energy cost
Better overclocked clock speed (Water) 4.64 GHz vs 4.46 GHz Around 5% better overclocked clock speed (Water)
Newer Mar, 2010 vs Mar, 2009 Release date 11 months later

Benchmarks Real world tests of Xeon W3520 vs E5630

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon W3520
7,257
Xeon E5630
7,840

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon W3520
1,935
Xeon E5630
1,973

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon W3520
117,600 MB/s
Xeon E5630
1,285,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon W3520
6,599
Xeon E5630
7,896

GeekBench (64-bit) Data courtesy Primate Labs

Xeon W3520
7,836
Xeon E5630
10,546

GeekBench

Xeon W3520
9,166
Xeon E5630
10,887

PassMark Data courtesy Passmark

Xeon W3520
5,061
Xeon E5630
5,161

PassMark (Single Core)

Xeon W3520
1,196
Xeon E5630
1,114

Specifications Full list of technical specs

summary

Xeon W3520  vs
E5630 
Clock speed 2.66 GHz 2.53 GHz
Turbo clock speed 2.93 GHz 2.8 GHz
Cores Quad core Quad core
Socket type
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 130W 80W
Annual home energy cost 31.32 $/year 19.27 $/year
Annual commercial energy cost 113.88 $/year 70.08 $/year
Performance per watt 1.38 pt/W 7.2 pt/W
Typical power consumption 105.63W 65W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Triple Channel
Supports ECC Yes Yes
Maximum bandwidth 25,599.99 MB/s 25,599.99 MB/s
Maximum memory size 24,576 MB 294,912 MB

details

Xeon W3520  vs
E5630 
Architecture x86-64 x86-64
Threads 8 8
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 12 MB
L3 cache per core 2 MB/core 3 MB/core
Manufacture process 45 nm 32 nm
Max CPUs 1 2
Clock multiplier 20 19
Voltage range 0.8 - 1.38V 0.75 - 1.35V
Operating temperature Unknown - 67.9°C Unknown - 77.6°C

overclocking

Overclock popularity 6 1
Overclocked clock speed 4.38 GHz 4.02 GHz
Overclocked clock speed (Water) 4.46 GHz 4.64 GHz
Overclocked clock speed (Air) 4.38 GHz 4.02 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 1 2
Data rate 19,200 MB/s 46,928 MB/s
Transfer rate 4,800 MT/s 5,860 MT/s
Clock speed 2,400 MHz 2,930 MHz
Intel Xeon W3520
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Intel Xeon E5630
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