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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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Much higher clock speed 2.66 GHz vs 1 GHz Around 2.8x higher clock speed
Much better overclocked clock speed (Air) 4.38 GHz vs 1 GHz Around 4.5x better overclocked clock speed (Air)
Significantly better PassMark score 5,061 vs 516 More than 9.8x better PassMark score
More threads 8 vs 2 6 more threads
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 4.46 GHz vs 1 GHz Around 4.5x better overclocked clock speed (Water)
Front view of AMD G G-T40N

Reasons to consider the
AMD G G-T40N

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Much lower typical power consumption 7.31W vs 105.63W 14.4x lower typical power consumption
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Newer manufacturing process 40 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher Maximum operating temperature 90 °C vs 67.9 °C Around 35% higher Maximum operating temperature
Much lower annual home energy cost 2.17 $/year vs 31.32 $/year 14.4x lower annual home energy cost
Much lower annual commercial energy cost 7.88 $/year vs 113.88 $/year 14.4x lower annual commercial energy cost
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Newer Jan, 2011 vs Mar, 2009 Release date over 1 years later
Better performance per watt 2.34 pt/W vs 1.38 pt/W More than 70% better performance per watt

Benchmarks Real world tests of Xeon W3520 vs G G-T40N

PassMark Data courtesy Passmark

Xeon W3520
5,061
G G-T40N
516

Specifications Full list of technical specs

summary

Xeon W3520  vs
G G-T40N 
Clock speed 2.66 GHz 1 GHz
Cores Quad core Dual core

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
SSE3
SSE
AMD64
SSE4.1
SSE4.2
AMD-V
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 130W 9W
Annual home energy cost 31.32 $/year 2.17 $/year
Annual commercial energy cost 113.88 $/year 7.88 $/year
Performance per watt 1.38 pt/W 2.34 pt/W
Typical power consumption 105.63W 7.31W

details

Xeon W3520  vs
G G-T40N 
Threads 8 2
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 45 nm 40 nm
Max CPUs 1 1
Clock multiplier 20 5
Operating temperature Unknown - 67.9°C Unknown - 90°C

overclocking

Overclocked clock speed 4.38 GHz 1 GHz
Overclocked clock speed (Water) 4.46 GHz 1 GHz
Overclocked clock speed (Air) 4.38 GHz 1 GHz

integrated graphics

GPU None GPU
Label N/A AMD Radeon HD 6250HD 6290
GPU clock speed N/A 280 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Single Channel
Maximum bandwidth 25,599.99 MB/s 8,533.33 MB/s
Intel Xeon W3520
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AMD G G-T40N
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