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Differences What are the advantages of each

Front view of Intel Core i7 840QM

Reasons to consider the
Intel Core i7 840QM

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Significantly lower typical power consumption 36.56W vs 62.56W More than 40% lower typical power consumption
Significantly lower annual home energy cost 10.84 $/year vs 18.55 $/year More than 40% lower annual home energy cost
Significantly lower annual commercial energy cost 39.42 $/year vs 67.45 $/year More than 40% lower annual commercial energy cost
Front view of Intel Core i7 3770

Reasons to consider the
Intel Core i7 3770

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Much higher clock speed 3.4 GHz vs 1.86 GHz Around 85% higher clock speed
Much newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher turbo clock speed 3.9 GHz vs 3.2 GHz More than 20% higher turbo clock speed
Much better performance per dollar 2.33 pt/$ vs 0.27 pt/$ Around 8.8x better performance per dollar
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much better PassMark (Single core) score 2,072 vs 1,007 More than 2x better PassMark (Single core) score
Significantly better PassMark score 9,449 vs 3,419 More than 2.8x better PassMark score
Significantly better performance per watt 7.25 pt/W vs 3.37 pt/W Around 2.2x better performance per watt
Significantly better overclocked clock speed (Air) 4.03 GHz vs 3.06 GHz More than 30% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.32 GHz vs 1.87 GHz More than 2.2x better overclocked clock speed (Water)
Newer Apr, 2012 vs Jun, 2010 Release date over 1 years later

Benchmarks Real world tests of Core i7 840QM vs 3770

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 840QM
129,300 MB/s
Core i7 3770
2,660,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 840QM  vs
3770 
Clock speed 1.86 GHz 3.4 GHz
Turbo clock speed 3.2 GHz 3.9 GHz
Cores Quad core Quad core
Socket type
rPGA 988A
LGA 1155
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 45W 77W
Annual home energy cost 10.84 $/year 18.55 $/year
Annual commercial energy cost 39.42 $/year 67.45 $/year
Performance per watt 3.37 pt/W 7.25 pt/W
Typical power consumption 36.56W 62.56W

bus

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

details

Core i7 840QM  vs
3770 
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 22 nm
Transistor count 774,000,000 1,300,000,000
Max CPUs 1 1
Clock multiplier 14 34

overclocking

Overclocked clock speed 3.06 GHz 4.03 GHz
Overclocked clock speed (Water) 1.87 GHz 4.32 GHz
Overclocked clock speed (Air) 3.06 GHz 4.03 GHz

integrated graphics

GPU None GPU
Label N/A Intel® HD Graphics 4000
Latest DirectX N/A 11.x
Number of displays supported N/A 3
GPU clock speed N/A 650 MHz
Turbo clock speed N/A 1,150 MHz
3DMark06 N/A 5,339.9

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 21,333.32 MB/s 25,600 MB/s
Maximum memory size 8,192 MB 32,768 MB
Intel Core i7 840QM
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Intel Core i7 3770
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