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Differences What are the advantages of each

Front view of Intel Core i7 680UM

Reasons to consider the
Intel Core i7 680UM

Report a correction

CPUBoss is not aware of any important advantages of the 680UM vs the 640M.

Front view of Intel Core i7 640M

Reasons to consider the
Intel Core i7 640M

Report a correction

CPUBoss is not aware of any important advantages of the 640M vs the 680UM.

Benchmarks Real world tests of Core i7 680UM vs 640M

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 680UM
2,254.5
Core i7 640M
4,385

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i7 680UM
1,335.5
Core i7 640M
2,187

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 680UM
1,150 MB/s
Core i7 640M
1,570,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

Specifications Full list of technical specs

summary

Core i7 680UM  vs
640M 
Clock speed 1.46 GHz 2.8 GHz
Turbo clock speed 2.53 GHz 3.46 GHz
Cores Dual core Dual core
Socket type
BGA 1288
rPGA 988A
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
SSE3
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 18W 35W
Annual home energy cost 4.34 $/year 8.43 $/year
Performance per watt 3.06 pt/W 18.3 pt/W
Typical power consumption 14.63W 28.44W

bus

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

details

Core i7 680UM  vs
640M 
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 32 nm
Transistor count 382,000,000 382,000,000
Max CPUs 1 1
Clock multiplier 11 21

overclocking

Overclocked clock speed 1.47 GHz 3.37 GHz
Overclocked clock speed (Water) 1.47 GHz 2.8 GHz
Overclocked clock speed (Air) 1.47 GHz 3.37 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics Intel® HD Graphics
Number of displays supported 2 2
GPU clock speed 166 MHz 500 MHz
Turbo clock speed 500 MHz 766 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1066
DDR3-800
DDR3
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 12,800 MB/s 17,066.66 MB/s
Maximum memory size 8,192 MB 8,192 MB
Intel Core i7 680UM
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Intel Core i7 640M
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