CPUBoss Review Our evaluation of W3520 vs 6700K among all CPUs

Performance

Benchmark performance using all cores
Xeon W3520
5.7
Core i7 6700K
6.6
Core i7 4790K
7.7
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance
Xeon W3520
6.3
Core i7 6700K
8.0
Core i7 4790K
9.9
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics
Xeon W3520
0.0
Core i7 6700K
n.d.
Core i7 4790K
9.2
Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing
Xeon W3520
0.0
Core i7 6700K
8.1
Core i7 4790K
7.4
CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?
Xeon W3520
5.0
Core i7 6700K
5.1
Core i7 4790K
5.2
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?
Xeon W3520
5.2
Core i7 6700K
5.7
Core i7 4790K
5.8
Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more
8.1

CPUBoss Score

Combination of all six facets
Xeon W3520
5.2
Core i7 6700K
8.1
Core i7 4790K
8.5

Winner
Intel Core i7 6700K 

CPUBoss recommends the Intel Core i7 6700K  based on its performance and single-core performance.

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VS

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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Better performance per dollar 1.31 pt/$ vs 1.07 pt/$ Around 25% better performance per dollar
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 newer manufacturing process 14 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher clock speed 4 GHz vs 2.66 GHz More than 50% higher clock speed
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 better PassMark (Single core) score 2,349 vs 1,196 More than 95% better PassMark (Single core) score
Newer Jul, 2015 vs Mar, 2009 Release date over 6 years later
Better PassMark score 11,109 vs 5,061 Around 2.2x better PassMark score
Lower typical power consumption 73.94W vs 105.63W 30% lower typical power consumption
Better performance per watt 3.46 pt/W vs 1.38 pt/W More than 2.5x better performance per watt
Better overclocked clock speed (Air) 4.62 GHz vs 4.38 GHz More than 5% better overclocked clock speed (Air)
Lower annual commercial energy cost 79.72 $/year vs 113.88 $/year More than 30% lower annual commercial energy cost
Lower annual home energy cost 21.92 $/year vs 31.32 $/year 30% lower annual home energy cost
Slightly better overclocked clock speed (Water) 4.77 GHz vs 4.54 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 3.46 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 4.62 GHz
Overclocked clock speed (Water) 4.54 GHz 4.77 GHz
Overclocked clock speed (Air) 4.38 GHz 4.62 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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