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Differences What are the advantages of each

Front view of Intel Core i5 2500K

Reasons to consider the
Intel Core i5 2500K

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Significantly higher turbo clock speed 3.7 GHz vs 2.6 GHz More than 40% higher turbo clock speed
Significantly higher clock speed 3.3 GHz vs 2.4 GHz Around 40% higher clock speed
Much better performance per dollar 4.1 pt/$ vs 1.38 pt/$ Around 3x better performance per dollar
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed
Much better PassMark (Single core) score 1,863 vs 579 Around 3.2x better PassMark (Single core) score
Much better overclocked clock speed (Air) 4.98 GHz vs 2.4 GHz More than 2x better overclocked clock speed (Air)
Better PassMark score 6,383 vs 3,344 More than 90% better PassMark score
Much better overclocked clock speed (Water) 4.88 GHz vs 2.4 GHz More than 2x better overclocked clock speed (Water)
Front view of Intel Atom C2750

Reasons to consider the
Intel Atom C2750

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Much lower typical power consumption 16.25W vs 112.55W 6.9x lower typical power consumption
Significantly newer manufacturing process 22 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More cores 8 vs 4 Twice as many cores; run more applications at once
Much better performance per watt 11.79 pt/W vs 6.79 pt/W Around 75% better performance per watt
Significantly higher Maximum operating temperature 97 °C vs 72.6 °C Around 35% higher Maximum operating temperature
Much lower annual home energy cost 4.82 $/year vs 41.29 $/year 8.6x lower annual home energy cost
More threads 8 vs 4 Twice as many threads
Much lower annual commercial energy cost 17.52 $/year vs 110.03 $/year 6.3x lower annual commercial energy cost
Newer Jul, 2013 vs Jan, 2011 Release date over 2 years later

Benchmarks Real world tests of Core i5 2500K vs Atom C2750

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 i5 2500K
2,530,000 MB/s
Atom C2750
412,200 MB/s

Cinebench R10 32-Bit

Core i5 2500K
20,381
Atom C2750
11,258

Cinebench R10 32-Bit (Single Core)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i5 2500K  vs
Atom C2750 
Clock speed 3.3 GHz 2.4 GHz
Turbo clock speed 3.7 GHz 2.6 GHz
Cores Quad core Octa core

features

Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
SSE4.2
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes No

power consumption

TDP 95W 20W
Annual home energy cost 41.29 $/year 4.82 $/year
Annual commercial energy cost 110.03 $/year 17.52 $/year
Performance per watt 6.79 pt/W 11.79 pt/W
Typical power consumption 112.55W 16.25W

bus

Architecture DMI FSB
Number of links 1 1

details

Core i5 2500K  vs
Atom C2750 
Architecture x86-64 x86-64
Threads 4 8
Manufacture process 32 nm 22 nm
Max CPUs 1 1
Operating temperature 5 - 72.6°C Unknown - 97°C

overclocking

Overclocked clock speed 4.98 GHz 2.4 GHz
Overclocked clock speed (Water) 4.88 GHz 2.4 GHz
Overclocked clock speed (Air) 4.98 GHz 2.4 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 3000 N/A
Latest DirectX 10.1 N/A
Number of displays supported 2 N/A
GPU clock speed 850 MHz N/A
Turbo clock speed 1,100 MHz N/A
3DMark06 5,275 N/A

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
Channels Dual Channel Dual Channel
Supports ECC No Yes
Maximum bandwidth 21,333.32 MB/s 12,800 MB/s
Intel Core i5 2500K
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Intel Atom C2750
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