CPUBoss Review Our evaluation of 3940XM vs 3630QM among laptop CPUs (over 15W)

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

7.7

CPUBoss Score

Combination of all six facets

Winner
Intel Core i7 3940XM 

CPUBoss recommends the Intel Core i7 3940XM  based on its single-core performance.

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VS

Intel Core i7 3940XM

CPUBoss Winner
Front view of Intel Core i7 3940XM

Differences What are the advantages of each

Front view of Intel Core i7 3940XM

Reasons to consider the
Intel Core i7 3940XM

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much higher turbo clock speed 3.9 GHz vs 3.4 GHz Around 15% higher turbo clock speed
Significantly higher clock speed 3 GHz vs 2.4 GHz More than 25% higher clock speed
Much better fire strike score 598 vs 580 Around 5% better fire strike score
Much better geekbench 2 (32-bit) score 12,746 vs 10,190 More than 25% better geekbench 2 (32-bit) score
Significantly 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
Significantly better turbo clock speed 1,350 MHz vs 1,150 MHz More than 15% better turbo clock speed
Much better overclocked clock speed (Air) 4.47 GHz vs 3.15 GHz More than 40% better overclocked clock speed (Air)
Significantly better PassMark score 9,820 vs 7,766 More than 25% better PassMark score
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Significantly better geekbench 3 single core score 3,370 vs 2,775 More than 20% better geekbench 3 single core score
Significantly more l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Significantly better overclocked clock speed (Water) 3 GHz vs 2.4 GHz More than 25% better overclocked clock speed (Water)
Front view of Intel Core i7 3630QM

Reasons to consider the
Intel Core i7 3630QM

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Significantly lower typical power consumption 36.56W vs 44.69W Around 20% lower typical power consumption
Better performance per dollar 1.27 pt/$ vs 0.38 pt/$ More than 3.2x better performance per dollar
Significantly lower annual home energy cost 10.84 $/year vs 13.25 $/year Around 20% lower annual home energy cost

Benchmarks Real world tests of Core i7 3940XM vs 3630QM

Sky Diver Data courtesy FutureMark

Cloud Gate Data courtesy FutureMark

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 3940XM
2,680,000 MB/s
Core i7 3630QM
2,270,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 3940XM  vs
3630QM 
Clock speed 3 GHz 2.4 GHz
Turbo clock speed 3.9 GHz 3.4 GHz
Cores Quad core Quad core
Socket type
rPGA 988B
Is unlocked Yes No

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
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 55W 45W
Annual home energy cost 13.25 $/year 10.84 $/year
Performance per watt 15.13 pt/W 12.1 pt/W
Typical power consumption 44.69W 36.56W

bus

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

details

Core i7 3940XM  vs
3630QM 
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 30 24
Operating temperature Unknown - 105°C Unknown - 105°C

overclocking

Overclocked clock speed 4.47 GHz 3.15 GHz
Overclocked clock speed (Water) 3 GHz 2.4 GHz
PassMark (Overclocked) 6,125.4 3,563.1
Overclocked clock speed (Air) 4.47 GHz 3.15 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 1,350 MHz 1,150 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3L-1600
DDR3-1333
DDR3L-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 3940XM
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Intel Core i7 3630QM
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