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Differences What are the advantages of each

Front view of Intel Core i7 620LE

Reasons to consider the
Intel Core i7 620LE

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Lower typical power consumption 20.31W vs 28.44W Around 30% lower typical power consumption
Lower annual commercial energy cost 21.9 $/year vs 30.66 $/year Around 30% lower annual commercial energy cost
Lower annual home energy cost 6.02 $/year vs 8.43 $/year Around 30% lower annual home energy cost
Front view of Intel Core i7 3520M

Reasons to consider the
Intel Core i7 3520M

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Significantly higher clock speed 2.9 GHz vs 2 GHz Around 45% higher clock speed
Much better turbo clock speed 1,250 MHz vs 566 MHz Around 2.2x better turbo clock speed
Higher turbo clock speed 3.6 GHz vs 2.8 GHz Around 30% higher turbo clock speed
Significantly newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much higher GPU clock speed 650 MHz vs 266 MHz Around 2.5x higher GPU clock speed
Significantly better overclocked clock speed (Air) 3.31 GHz vs 2 GHz More than 65% better overclocked clock speed (Air)
More number of displays supported 3 vs 2 1 more number of displays supported
Newer Jun, 2012 vs Jan, 2010 Release date over 2 years later
Significantly better overclocked clock speed (Water) 2.9 GHz vs 2 GHz Around 45% better overclocked clock speed (Water)

Features Key features of the Core i7 620LE  vs 3520M 

clock speed

turbo clock speed

Core i7 620LE
2.8 GHz
Core i7 3520M
3.6 GHz

L2 cache

gpu clock speed

Core i7 620LE
266 MHz
Core i7 3520M
650 MHz

overclocked clock speed (air)

Core i7 3520M
3.31 GHz

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Core i7 620LE  vs
3520M 
Clock speed 2 GHz 2.9 GHz
Turbo clock speed 2.8 GHz 3.6 GHz
Cores Dual core Dual core
Socket type
BGA 1288
rPGA 988B
Is unlocked No No

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 25W 35W
Annual home energy cost 6.02 $/year 8.43 $/year
Annual commercial energy cost 21.9 $/year 30.66 $/year
Typical power consumption 20.31W 28.44W

bus

Architecture DMI DMI
Number of links 1 1
Transfer rate 2,500 MT/s 5,000 MT/s

details

Core i7 620LE  vs
3520M 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 4 MB 4 MB
L3 cache per core 2 MB/core 2 MB/core
Manufacture process 32 nm 22 nm
Max CPUs 1 1
Clock multiplier 15 29

overclocking

Overclocked clock speed 2 GHz 3.31 GHz
Overclocked clock speed (Water) 2 GHz 2.9 GHz
Overclocked clock speed (Air) 2 GHz 3.31 GHz

integrated graphics

GPU GPU GPU
Label Integrated Intel® HD Graphics 4000
Number of displays supported 2 3
GPU clock speed 266 MHz 650 MHz
Turbo clock speed 566 MHz 1,250 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3L-1600
DDR3-1333
DDR3-1066
DDR3L-1333
DDR3
DDR3-800
Channels Dual Channel Dual Channel
Supports ECC Yes No
Maximum bandwidth 17,066.66 MB/s 25,600 MB/s
Maximum memory size 9,000.96 MB 32,768 MB
Intel Core i7 620LE
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Intel Core i7 3520M
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