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Differences What are the advantages of each

Front view of Intel Core i7 3555LE

Reasons to consider the
Intel Core i7 3555LE

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Much lower typical power consumption 20.31W vs 112.55W 5.5x lower typical power consumption
Significantly newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher Maximum operating temperature 105 °C vs 72.6 °C Around 45% higher Maximum operating temperature
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
More number of displays supported 3 vs 2 1 more number of displays supported
Much lower annual home energy cost 6.02 $/year vs 41.29 $/year 6.9x lower annual home energy cost
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Much lower annual commercial energy cost 21.9 $/year vs 110.03 $/year 5x lower annual commercial energy cost
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Newer Jun, 2012 vs Jan, 2011 Release date over 1 years later
Front view of Intel Core i5 2500K

Reasons to consider the
Intel Core i5 2500K

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much better performance per dollar 4.1 pt/$ vs 0.36 pt/$ More than 11.5x better performance per dollar
Significantly higher clock speed 3.3 GHz vs 2.5 GHz More than 30% higher clock speed
Higher turbo clock speed 3.7 GHz vs 3.2 GHz More than 15% higher turbo clock speed
Much higher GPU clock speed 850 MHz vs 550 MHz Around 55% higher GPU clock speed
Much better overclocked clock speed (Air) 4.98 GHz vs 2.99 GHz More than 65% better overclocked clock speed (Air)
Better turbo clock speed 1,100 MHz vs 1,000 MHz 10% better turbo clock speed
Slightly more l3 cache 6 MB vs 4 MB 50% more l3 cache; more data can be stored in the l3 cache for quick access later
More cores 4 vs 2 Twice as many cores; run more applications at once
Better PassMark score 6,383 vs 4,130 Around 55% better PassMark score
Better performance per watt 6.79 pt/W vs 4.96 pt/W More than 35% better performance per watt
Much better overclocked clock speed (Water) 4.88 GHz vs 2.5 GHz More than 95% better overclocked clock speed (Water)
Better PassMark (Single core) score 1,863 vs 1,643 Around 15% better PassMark (Single core) score

Benchmarks Real world tests of Core i7 3555LE vs i5 2500K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 3555LE
2,090 MB/s
Core i5 2500K
2,530,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 3555LE  vs
i5 2500K 
Clock speed 2.5 GHz 3.3 GHz
Turbo clock speed 3.2 GHz 3.7 GHz
Cores Dual core Quad core
Socket type
BGA 1023
LGA 1155
Is unlocked No Yes

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 25W 95W
Annual home energy cost 6.02 $/year 41.29 $/year
Annual commercial energy cost 21.9 $/year 110.03 $/year
Performance per watt 4.96 pt/W 6.79 pt/W
Typical power consumption 20.31W 112.55W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 5,000 MT/s 5,000 MT/s

details

Core i7 3555LE  vs
i5 2500K 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.25 MB/core
L3 cache 4 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 22 nm 32 nm
Max CPUs 1 1
Clock multiplier 25 33
Operating temperature Unknown - 105°C 5 - 72.6°C

overclocking

Overclocked clock speed 2.99 GHz 4.98 GHz
Overclocked clock speed (Water) 2.5 GHz 4.88 GHz
Overclocked clock speed (Air) 2.99 GHz 4.98 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 4000 Intel® HD Graphics 3000
Latest DirectX 10.x 10.1
Number of displays supported 3 2
GPU clock speed 550 MHz 850 MHz
Turbo clock speed 1,000 MHz 1,100 MHz
3DMark06 5,344.5 5,275

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 12,800 MB/s 21,333.32 MB/s
Maximum memory size 16,384 MB 32,768 MB
Intel Core i7 3555LE
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Intel Core i5 2500K
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