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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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Much higher turbo clock speed 3.7 GHz vs None Compared to all cpus, 3.7 GHz turbo clock speed is just OK
Much higher clock speed 3.3 GHz vs 1.4 GHz More than 2.2x higher clock speed
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much better geekbench 2 (32-bit) score 10,319 vs 1,162 Around 9x better geekbench 2 (32-bit) score
Much higher GPU clock speed 850 MHz vs 400 MHz Around 2.2x higher GPU clock speed
Much better overclocked clock speed (Air) 4.98 GHz vs 1.4 GHz More than 3.5x better overclocked clock speed (Air)
Much better PassMark (Single core) score 1,863 vs 516 More than 3.5x better PassMark (Single core) score
Significantly better PassMark score 6,383 vs 886 Around 7.2x better PassMark score
More cores 4 vs 2 Twice as many cores; run more applications at once
Much better overclocked clock speed (Water) 4.88 GHz vs 1.4 GHz Around 3.5x better overclocked clock speed (Water)
More threads 4 vs 2 Twice as many threads
Front view of AMD E1 2500

Reasons to consider the
AMD E1 2500

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Much lower typical power consumption 12.19W vs 112.55W 9.2x lower typical power consumption
Much better performance per watt 12.98 pt/W vs 6.79 pt/W More than 90% better performance per watt
Newer manufacturing process 28 nm vs 32 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower annual home energy cost 3.61 $/year vs 41.29 $/year 11.4x lower annual home energy cost
Significantly higher Maximum operating temperature 90 °C vs 72.6 °C Around 25% higher Maximum operating temperature
Much lower annual commercial energy cost 13.14 $/year vs 110.03 $/year 8.4x lower annual commercial energy cost
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Newer Apr, 2013 vs Jan, 2011 Release date over 2 years later

Benchmarks Real world tests of Core i5 2500K vs E1 2500

GeekBench 3 (Multi-core) Data courtesy Primate Labs

E1 2500
1,221

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
E1 2500
677,550 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Core i5 2500K
10,319
E1 2500
1,162

GeekBench

Core i5 2500K
13,624
E1 2500
1,162

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i5 2500K  vs
E1 2500 
Clock speed 3.3 GHz 1.4 GHz
Turbo clock speed 3.7 GHz None
Cores Quad core Dual core
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
F16C
MMX
SSE4
AVX
SSE3
EM64T
SSE
BMI1
AMD64
SSE4.1
SSE4.2
AMD-V
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 15W
Annual home energy cost 41.29 $/year 3.61 $/year
Annual commercial energy cost 110.03 $/year 13.14 $/year
Performance per watt 6.79 pt/W 12.98 pt/W
Typical power consumption 112.55W 12.19W

details

Core i5 2500K  vs
E1 2500 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 1 MB 1 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
Manufacture process 32 nm 28 nm
Max CPUs 1 1
Operating temperature 5 - 72.6°C Unknown - 90°C

overclocking

Overclocked clock speed 4.98 GHz 1.4 GHz
Overclocked clock speed (Water) 4.88 GHz 1.4 GHz
PassMark (Overclocked) 5,433.6 717.1
Overclocked clock speed (Air) 4.98 GHz 1.4 GHz

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 3000 Radeon™ HD 8240
Latest DirectX 10.1 11.0
GPU clock speed 850 MHz 400 MHz

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1333
DDR3-1066
DDR3
DDR3L-1333
Intel Core i5 2500K
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AMD E1 2500
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