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Differences What are the advantages of each

Front view of Intel Core i7 3840QM

Reasons to consider the
Intel Core i7 3840QM

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CPUBoss is not aware of any important advantages of the 3840QM vs the 3720QM.

Front view of Intel Core i7 3720QM

Reasons to consider the
Intel Core i7 3720QM

Report a correction

CPUBoss is not aware of any important advantages of the 3720QM vs the 3840QM.

Benchmarks Real world tests of Core i7 3840QM vs 3720QM

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core i7 3840QM
13.55 mHash/s
Core i7 3720QM
12.82 mHash/s

CompuBench 1.5 (Face detection)

Core i7 3840QM
3.41 mPixels/s
Core i7 3720QM
8.84 mPixels/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

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 3840QM
2,550,000 MB/s
Core i7 3720QM
2,410,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 3840QM  vs
3720QM 
Clock speed 2.8 GHz 2.6 GHz
Turbo clock speed 3.8 GHz 3.6 GHz
Cores Quad core Quad core
Socket type
rPGA 988B
BGA 1224
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 45W
Annual home energy cost 10.84 $/year 10.84 $/year
Performance per watt 17.05 pt/W 11.87 pt/W
Typical power consumption 36.56W 36.56W

bus

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

details

Core i7 3840QM  vs
3720QM 
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 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 1 1
Clock multiplier 28 26
Operating temperature Unknown - 105°C Unknown - 105°C

overclocking

Overclocked clock speed 3.88 GHz 3.47 GHz
Overclocked clock speed (Water) 2.8 GHz 2.6 GHz
Overclocked clock speed (Air) 3.88 GHz 3.47 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 4000 Intel® HD Graphics 4000
Number of displays supported 3 3
GPU clock speed 650 MHz 650 MHz
Turbo clock speed 1,300 MHz 1,250 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3L-1600
DDR3L-1333
DDR3RS-1600
DDR3RS-1333
DDR3
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 12,800 MB/s 25,600 MB/s
Maximum memory size 32,768 MB 32,768 MB
Intel Core i7 3840QM
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Intel Core i7 3720QM
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