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Differences What are the advantages of each

Front view of Intel Core2 QX6800

Reasons to consider the
Intel Core2 QX6800

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Much more l2 cache 8 MB vs 1 MB 8x more l2 cache; more data can be stored in the l2 cache for quick access later
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Higher clock speed 2.93 GHz vs 2.4 GHz More than 20% higher clock speed
Much more l2 cache per core 2 MB/core vs 0.25 MB/core 8x more l2 cache per core
Better overclocked clock speed (Water) 2.93 GHz vs 2.4 GHz More than 20% better overclocked clock speed (Water)
Front view of Intel Core i7 4950HQ

Reasons to consider the
Intel Core i7 4950HQ

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Much newer manufacturing process 22 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 38.19W vs 105.63W 2.8x lower typical power consumption
Much higher Maximum operating temperature 100 °C vs 64.5 °C More than 55% higher Maximum operating temperature
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Newer Jul, 2013 vs Apr, 2007 Release date over 6 years later
More threads 8 vs 4 Twice as many threads
Better overclocked clock speed (Air) 4.4 GHz vs 3.82 GHz More than 15% better overclocked clock speed (Air)
Much lower annual home energy cost 11.32 $/year vs 31.32 $/year 2.8x lower annual home energy cost
Much lower annual commercial energy cost 41.17 $/year vs 113.88 $/year 2.8x lower annual commercial energy cost

Features Key features of the Core2 QX6800  vs Core i7 4950HQ 

clock speed

Core2 QX6800
2.93 GHz
Core i7 4950HQ
2.4 GHz

L2 cache

overclocked clock speed (air)

Core2 QX6800
3.82 GHz
Core i7 4950HQ
4.4 GHz

overclocked clock speed (water)

Core2 QX6800
2.93 GHz
Core i7 4950HQ
2.4 GHz

Specifications Full list of technical specs

summary

Core2 QX6800  vs
Core i7 4950HQ 
Clock speed 2.93 GHz 2.4 GHz
Cores Quad core Quad core
Is unlocked Yes No

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
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 130W 47W
Annual home energy cost 31.32 $/year 11.32 $/year
Annual commercial energy cost 113.88 $/year 41.17 $/year
Typical power consumption 105.63W 38.19W

details

Core2 QX6800  vs
Core i7 4950HQ 
Architecture x86-64 x86-64
Threads 4 8
L2 cache 8 MB 1 MB
L2 cache per core 2 MB/core 0.25 MB/core
Manufacture process 65 nm 22 nm
Max CPUs 1 1
Operating temperature Unknown - 64.5°C Unknown - 100°C

overclocking

Overclocked clock speed 3.82 GHz 4.4 GHz
Overclocked clock speed (Water) 2.93 GHz 2.4 GHz
Overclocked clock speed (Air) 3.82 GHz 4.4 GHz

integrated graphics

GPU None GPU
Label N/A Intel® Iris™ Pro Graphics 5200
Number of displays supported N/A 3
GPU clock speed N/A 200 MHz
Turbo clock speed N/A 1,300 MHz

bus

Architecture FSB DMI 2.0
Number of links 1 1
Intel Core2 QX6800
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Intel Core i7 4950HQ
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