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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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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Front view of AMD Athlon II X4 641

Reasons to consider the
AMD Athlon II X4 641

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CPUBoss is not aware of any important advantages of the AMD Athlon II X4 641 vs the Intel Core i5 2500K.

Benchmarks Real world tests of Core i5 2500K vs Athlon II X4 641

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
Athlon II X4 641
116,900 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

3D Mark 11 (Physics)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i5 2500K  vs
Athlon II X4 641 
Clock speed 3.3 GHz 2.8 GHz
Turbo clock speed 3.7 GHz 0 GHz
Cores Quad core Quad core
Socket type
LGA 1155
FM1
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
EM64T
SSE
AMD64
SSE4.1
SSE4.2
AMD-V
3DNow!
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 100W
Annual home energy cost 41.29 $/year 24.09 $/year
Annual commercial energy cost 110.03 $/year 87.6 $/year
Performance per watt 6.79 pt/W 1.4 pt/W
Typical power consumption 112.55W 81.25W

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1866
DDR3-1333
DDR3-1066
DDR3

details

Core i5 2500K  vs
Athlon II X4 641 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 4 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 6 MB 0 MB
L3 cache per core 1.5 MB/core 0 MB/core
Manufacture process 32 nm 32 nm
Transistor count 1,160,000,000 1,178,000,000
Max CPUs 1 1
Voltage range 1.2 - 1.5V 0.45 - 1.41V
Operating temperature 5 - 72.6°C Unknown - 70.1°C

overclocking

Overclocked clock speed 4.98 GHz 3.37 GHz
Overclocked clock speed (Water) 4.88 GHz 2.8 GHz
Overclocked clock speed (Air) 4.98 GHz 3.37 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
Intel Core i5 2500K
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AMD Athlon II X4 641
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