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Intel Xeon W3520

Front view of Intel Xeon W3520
Front view of Intel Core i7 6700K

Intel Core i7 6700K

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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 Maximum operating temperature 67.9 °C vs 64 °C More than 5% higher Maximum operating temperature
Front view of Intel Core i7 6700K

Reasons to consider the
Intel Core i7 6700K

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Much higher clock speed 4 GHz vs 2.66 GHz More than 50% higher clock speed
Much newer manufacturing process 14 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Significantly higher turbo clock speed 4.2 GHz vs 2.93 GHz Around 45% higher turbo clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 73.94W vs 105.63W 30% lower typical power consumption
Much better PassMark (Single core) score 2,349 vs 1,196 More than 95% better PassMark (Single core) score
Significantly better PassMark score 11,109 vs 5,061 Around 2.2x better PassMark score
Newer Jul, 2015 vs Mar, 2009 Release date over 6 years later
Significantly better performance per dollar 0.91 pt/$ vs 0.59 pt/$ Around 55% better performance per dollar
Better performance per watt 3.49 pt/W vs 1.38 pt/W More than 2.5x better performance per watt
Much lower annual home energy cost 21.92 $/year vs 31.32 $/year 30% lower annual home energy cost
Much lower annual commercial energy cost 79.72 $/year vs 113.88 $/year More than 30% lower annual commercial energy cost
Better overclocked clock speed (Air) 4.61 GHz vs 4.38 GHz More than 5% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 4.77 GHz vs 4.46 GHz More than 5% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon W3520 vs Core i7 6700K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon W3520
7,257
Core i7 6700K
17,583

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon W3520
1,935
Core i7 6700K
4,510

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon W3520
117,600 MB/s
Core i7 6700K
6,010 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Xeon W3520
6,599
Core i7 6700K
17,169

GeekBench

Xeon W3520
9,166
Core i7 6700K
17,169

PassMark Data courtesy Passmark

Xeon W3520
5,061
Core i7 6700K
11,109

PassMark (Single Core)

Xeon W3520
1,196
Core i7 6700K
2,349

Specifications Full list of technical specs

summary

 Xeon W3520  vs
Core i7 6700K 
Clock speed 2.66 GHz 4 GHz
Turbo clock speed 2.93 GHz 4.2 GHz
Cores Quad core Quad core

features
Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption
TDP 130W 91W
Annual home energy cost 31.32 $/year 21.92 $/year
Annual commercial energy cost 113.88 $/year 79.72 $/year
Performance per watt 1.38 pt/W 3.49 pt/W
Typical power consumption 105.63W 73.94W

bus
Architecture QPI FSB
Number of links 1 0
Transfer rate 4,800 MT/s 8,000 MT/s

details

 Xeon W3520  vs
Core i7 6700K 
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 8 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 45 nm 14 nm
Max CPUs 1 1
Operating temperature Unknown - 67.9°C Unknown - 64°C

overclocking
Overclocked clock speed 4.38 GHz 4.61 GHz
Overclocked clock speed (Water) 4.46 GHz 4.77 GHz
Overclocked clock speed (Air) 4.38 GHz 4.61 GHz

integrated graphics
GPU None GPU
Label N/A Intel® HD Graphics 530
Number of displays supported N/A 3
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 1,150 MHz

memory controller
Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR3-1066
DDR3-800
DDR3
Channels Triple Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 25,599.99 MB/s 25,600 MB/s
Maximum memory size 24,576 MB 65,536 MB
Intel Xeon W3520
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Intel Core i7 6700K
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