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Differences What are the advantages of each

Front view of Intel Xeon W3540

Reasons to consider the
Intel Xeon W3540

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Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 8 vs 4 Twice as many threads
Better overclocked clock speed (Air) 4.51 GHz vs 3.77 GHz Around 20% better overclocked clock speed (Air)
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Front view of Intel Core i5 6500

Reasons to consider the
Intel Core i5 6500

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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
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 52.81W vs 105.63W 2x lower typical power consumption
Higher turbo clock speed 3.6 GHz vs 3.2 GHz More than 10% higher turbo clock speed
Higher clock speed 3.2 GHz vs 2.93 GHz Around 10% higher clock speed
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Significantly better PassMark (Single core) score 1,951 vs 1,300 More than 50% better PassMark (Single core) score
Newer Jul, 2015 vs Mar, 2009 Release date over 6 years later
Significantly better performance per dollar 0.63 pt/$ vs 0.33 pt/$ Around 95% better performance per dollar
Better performance per watt 3.9 pt/W vs 1.5 pt/W More than 2.5x better performance per watt
Better PassMark score 7,217 vs 5,479 More than 30% better PassMark score
Much lower annual home energy cost 15.66 $/year vs 31.32 $/year 2x lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 113.88 $/year 2x lower annual commercial energy cost
Much better overclocked clock speed (Water) 4.29 GHz vs 2.93 GHz More than 45% better overclocked clock speed (Water)

Benchmarks Real world tests of Xeon W3540 vs Core i5 6500

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Xeon W3540
7,923
Core i5 6500
13,537

GeekBench 3 (Single core) Data courtesy Primate Labs

Xeon W3540
2,092
Core i5 6500
4,233

GeekBench 3 (AES single core) Data courtesy Primate Labs

Xeon W3540
128,600 MB/s
Core i5 6500
5,880 MB/s

PassMark Data courtesy Passmark

Xeon W3540
5,479
Core i5 6500
7,217

PassMark (Single Core)

Xeon W3540
1,300
Core i5 6500
1,951

Specifications Full list of technical specs

summary

Xeon W3540  vs
Core i5 6500 
Clock speed 2.93 GHz 3.2 GHz
Turbo clock speed 3.2 GHz 3.6 GHz
Cores Quad core Quad core

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
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 65W
Annual home energy cost 31.32 $/year 15.66 $/year
Annual commercial energy cost 113.88 $/year 56.94 $/year
Performance per watt 1.5 pt/W 3.9 pt/W
Typical power consumption 105.63W 52.81W

bus

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

details

Xeon W3540  vs
Core i5 6500 
Architecture x86-64 x86-64
Threads 8 4
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 45 nm 14 nm
Max CPUs 1 1
Operating temperature Unknown - 67.9°C Unknown - 71°C

overclocking

Overclocked clock speed 4.51 GHz 3.77 GHz
Overclocked clock speed (Water) 2.93 GHz 4.29 GHz
Overclocked clock speed (Air) 4.51 GHz 3.77 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 1,050 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 W3540
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Intel Core i5 6500
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