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Differences What are the advantages of each

Front view of Intel Core i7 2600K

Reasons to consider the
Intel Core i7 2600K

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Much higher clock speed 3.4 GHz vs 1.3 GHz More than 2.5x higher clock speed
Significantly more l2 cache 1 MB vs 0.25 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher GPU clock speed 850 MHz vs 350 MHz Around 2.5x higher GPU clock speed
Much better turbo clock speed 1,350 MHz vs 950 MHz More than 40% better turbo clock speed
Much better overclocked clock speed (Air) 5.05 GHz vs 1.3 GHz Around 4x better overclocked clock speed (Air)
More l3 cache 8 MB vs 1.5 MB More than 5.2x more l3 cache; more data can be stored in the l3 cache for quick access later
More threads 8 vs 1 7 more threads
More cores 4 vs 1 3 more cores; run more applications at once
Much better overclocked clock speed (Water) 4.76 GHz vs 1.3 GHz Around 3.8x better overclocked clock speed (Water)
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Front view of Intel Celeron 787

Reasons to consider the
Intel Celeron 787

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Much lower typical power consumption 13.81W vs 114.2W 8.3x lower typical power consumption
Much higher Maximum operating temperature 100 °C vs 72.6 °C Around 40% higher Maximum operating temperature
Much lower annual home energy cost 4.1 $/year vs 41.8 $/year 10.2x lower annual home energy cost
Much lower annual commercial energy cost 14.89 $/year vs 111.78 $/year 7.5x lower annual commercial energy cost
Newer Jul, 2011 vs Jan, 2011 Release date 6 months later

Features Key features of the Core i7 2600K  vs Celeron 787 

clock speed

Core i7 2600K
3.4 GHz
Celeron 787
1.3 GHz

L2 cache

Celeron 787
0.25 MB

L3 cache

gpu clock speed

Core i7 2600K
850 MHz
Celeron 787
350 MHz

overclocked clock speed (air)

Core i7 2600K
5.05 GHz
Celeron 787
1.3 GHz

overclocked clock speed (water)

Core i7 2600K
4.76 GHz
Celeron 787
1.3 GHz

Specifications Full list of technical specs

summary

Core i7 2600K  vs
Celeron 787 
Clock speed 3.4 GHz 1.3 GHz
Cores Quad core Single core
Socket type
LGA 1155
BGA 1023

features

Has a NX bit Yes Yes
Supports trusted computing No 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 95W 17W
Annual home energy cost 41.8 $/year 4.1 $/year
Annual commercial energy cost 111.78 $/year 14.89 $/year
Typical power consumption 114.2W 13.81W

bus

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

details

Core i7 2600K  vs
Celeron 787 
Architecture x86-64 x86-64
Threads 8 1
L2 cache 1 MB 0.25 MB
L2 cache per core 0.25 MB/core 0.25 MB/core
L3 cache 8 MB 1.5 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 1
Clock multiplier 34 13
Operating temperature Unknown - 72.6°C Unknown - 100°C

overclocking

Overclocked clock speed 5.05 GHz 1.3 GHz
Overclocked clock speed (Water) 4.76 GHz 1.3 GHz
Overclocked clock speed (Air) 5.05 GHz 1.3 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 3000 Intel® HD Graphics
Number of displays supported 2 2
GPU clock speed 850 MHz 350 MHz
Turbo clock speed 1,350 MHz 950 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 21,333.32 MB/s 21,333.32 MB/s
Maximum memory size 32,768 MB 16,384 MB
Intel Core i7 2600K
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Intel Celeron 787
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