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Intel Core i5 2500K

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Front view of Intel Core i5 2500K

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
Much higher clock speed 3.3 GHz vs 1.7 GHz Around 95% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
More l2 cache 1 MB vs 0.5 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much better overclocked clock speed (Air) 4.98 GHz vs 1.7 GHz Around 3x better overclocked clock speed (Air)
Much better PassMark (Single core) score 1,863 vs 501 Around 3.8x better PassMark (Single core) score
Much better performance per watt 6.79 pt/W vs 1.86 pt/W Around 3.8x better performance per watt
Significantly better PassMark score 6,383 vs 1,808 More than 3.5x better PassMark score
Much better overclocked clock speed (Water) 4.88 GHz vs 1.7 GHz More than 2.8x better overclocked clock speed (Water)
More l2 cache per core 0.25 MB/core vs 0.13 MB/core 2x more l2 cache per core
Newer Jan, 2011 vs Oct, 2010 Release date 2 months later
Front view of AMD Phenom II P940

Reasons to consider the
AMD Phenom II P940

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Much lower typical power consumption 28.44W vs 112.55W 4x lower typical power consumption
Much lower annual home energy cost 8.43 $/year vs 41.29 $/year 4.9x lower annual home energy cost
Much lower annual commercial energy cost 30.66 $/year vs 110.03 $/year 3.6x lower annual commercial energy cost

Benchmarks Real world tests of Core i5 2500K vs Phenom II P940

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i5 2500K  vs
Phenom II P940 
Clock speed 3.3 GHz 1.7 GHz
Cores Quad core Quad core
Socket type
LGA 1155
S1
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
SSE4.1
SSE4.2
3DNow!
Supplemental SSE3
AES
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 35W
Annual home energy cost 41.29 $/year 8.43 $/year
Annual commercial energy cost 110.03 $/year 30.66 $/year
Performance per watt 6.79 pt/W 1.86 pt/W
Typical power consumption 112.55W 28.44W

details

Core i5 2500K  vs
Phenom II P940 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 0.5 MB
L2 cache per core 0.25 MB/core 0.13 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 4.98 GHz 1.7 GHz
Overclocked clock speed (Water) 4.88 GHz 1.7 GHz
Overclocked clock speed (Air) 4.98 GHz 1.7 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 Phenom II P940
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