CPUBoss Review Our evaluation of 4650U vs 4250U among laptop CPUs (up to 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

8.3

CPUBoss Score

Combination of all six facets

Winner
Intel Core i7 4650U 

CPUBoss recommends the Intel Core i7 4650U  based on its performance, single-core performance and value.

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VS

Intel Core i7 4650U

CPUBoss Winner
Front view of Intel Core i7 4650U

Differences What are the advantages of each

Front view of Intel Core i7 4650U

Reasons to consider the
Intel Core i7 4650U

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Much higher turbo clock speed 3.3 GHz vs 2.6 GHz More than 25% higher turbo clock speed
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Higher clock speed 1.7 GHz vs 1.3 GHz More than 30% higher clock speed
More l3 cache 4 MB vs 3 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Better geekbench 3 single core score 2,933 vs 2,409 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
Better turbo clock speed 1,100 MHz vs 1,000 MHz 10% better turbo clock speed
Significantly better performance per dollar 2.59 pt/$ vs 0.01 pt/$ More than 214x better performance per dollar
Significantly better overclocked clock speed (Air) 3.17 GHz vs 2.54 GHz Around 25% better overclocked clock speed (Air)
Better geekbench 3 Multi-Core score 5,624 vs 4,561 Around 25% better geekbench 3 Multi-Core score
Better 3DMark06 CPU score 3,249 vs 3,024 More than 5% better 3DMark06 CPU score
Better performance per watt 70.66 pt/W vs 44.47 pt/W Around 60% better performance per watt
Better overclocked clock speed (Water) 1.7 GHz vs 1.3 GHz More than 30% better overclocked clock speed (Water)
Front view of Intel Core i5 4250U

Reasons to consider the
Intel Core i5 4250U

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More l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly more l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core

Benchmarks Real world tests of Core i7 4650U vs i5 4250U

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core i7 4650U
19.28 mHash/s
Core i5 4250U
23.6 mHash/s

CompuBench 1.5 (Face detection)

Core i7 4650U
12.77 mPixels/s
Core i5 4250U
12.69 mPixels/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Core i7 4650U
1.22 fps
Core i5 4250U
1.22 fps

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 4650U
4,100,000 MB/s
Core i5 4250U
3,300,000 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 4650U  vs
i5 4250U 
Clock speed 1.7 GHz 1.3 GHz
Turbo clock speed 3.3 GHz 2.6 GHz
Cores Dual core Dual core
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
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 15W 15W
Annual home energy cost 3.61 $/year 3.61 $/year
Performance per watt 70.66 pt/W 44.47 pt/W
Typical power consumption 12.19W 12.19W

bus

Architecture DMI 2.0 DMI 2.0
Number of links 1 1
Transfer rate 5,000 MT/s 5,000 MT/s

details

Core i7 4650U  vs
i5 4250U 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 0.5 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 4 MB 3 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 1 1
Operating temperature Unknown - 72.6°C Unknown - 100°C

overclocking

Overclocked clock speed 3.17 GHz 2.54 GHz
Overclocked clock speed (Water) 1.7 GHz 1.3 GHz
Overclocked clock speed (Air) 3.17 GHz 2.54 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 5000 Intel® HD Graphics 5000
Number of displays supported 3 3
GPU clock speed 200 MHz 200 MHz
Turbo clock speed 1,100 MHz 1,000 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3-1333
DDR3-1066
DDR2-1066
DDR3
DDR3-800
DDR2-800
DDR2-667
DDR2
DDR
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 16,384 MB 16,384 MB
Intel Core i7 4650U
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Intel Core i5 4250U
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