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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 newer manufacturing process 22 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Higher clock speed 3 GHz vs 2.3 GHz More than 30% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much higher Maximum operating temperature 105 °C vs 55 °C More than 90% higher Maximum operating temperature
Much better overclocked clock speed (Air) 4.45 GHz vs 2.3 GHz Around 95% better overclocked clock speed (Air)
Slightly 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
More threads 8 vs 4 Twice as many threads
Newer Sep, 2012 vs Apr, 2009 Release date over 3 years later
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Better overclocked clock speed (Water) 3 GHz vs 2.3 GHz More than 30% better overclocked clock speed (Water)
Front view of AMD Opteron 2377 EE

Reasons to consider the
AMD Opteron 2377 EE

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Significantly more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Supports more CPUs in SMP configuration 2 vs 1 Twice as many CPUs in SMP configuration
Lower typical power consumption 32.5W vs 44.69W More than 25% lower typical power consumption
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Lower annual home energy cost 9.64 $/year vs 13.25 $/year More than 25% lower annual home energy cost
Lower annual commercial energy cost 35.04 $/year vs 48.18 $/year More than 25% lower annual commercial energy cost

Features Key features of the Core i7 3940XM  vs Opteron 2377 EE 

clock speed

L2 cache

L3 cache

overclocked clock speed (air)

Core i7 3940XM
4.45 GHz
Opteron 2377 EE
2.3 GHz

overclocked clock speed (water)

Specifications Full list of technical specs

summary

Core i7 3940XM  vs
Opteron 2377 EE 
Clock speed 3 GHz 2.3 GHz
Cores Quad core Quad core
Socket type
rPGA 988B
F
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE4
AVX
SSE3
SSE
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 55W 40W
Annual home energy cost 13.25 $/year 9.64 $/year
Annual commercial energy cost 48.18 $/year 35.04 $/year
Typical power consumption 44.69W 32.5W

details

Core i7 3940XM  vs
Opteron 2377 EE 
Threads 8 4
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 1 2
Clock multiplier 30 11
Operating temperature Unknown - 105°C 0 - 55°C

overclocking

Overclocked clock speed 4.45 GHz 2.3 GHz
Overclocked clock speed (Water) 3 GHz 2.3 GHz
Overclocked clock speed (Air) 4.45 GHz 2.3 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 4000 N/A
Number of displays supported 3 N/A
GPU clock speed 650 MHz N/A
Turbo clock speed 1,350 MHz N/A

bus

Architecture DMI HyperTransport 3.0
Intel Core i7 3940XM
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AMD Opteron 2377 EE
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