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Intel Core i5 2500K

CPUBoss Winner
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
Higher clock speed 3.3 GHz vs 2.6 GHz More than 25% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Higher turbo clock speed 3.7 GHz vs 3.2 GHz More than 15% higher turbo clock speed
Significantly better PassMark (Single core) score 1,863 vs 891 More than 2x better PassMark (Single core) score
Much better performance per watt 6.79 pt/W vs 1.11 pt/W More than 6x better performance per watt
Significantly better overclocked clock speed (Air) 4.98 GHz vs 3.88 GHz Around 30% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.88 GHz vs 2.9 GHz Around 70% better overclocked clock speed (Water)
More l3 cache per core 1.5 MB/core vs 1.33 MB/core Around 15% more l3 cache per core
Front view of AMD Opteron 6238

Reasons to consider the
AMD Opteron 6238

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Much more l2 cache 12 MB vs 1 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Significantly more l3 cache 16 MB vs 6 MB Around 2.8x more l3 cache; more data can be stored in the l3 cache for quick access later
Supports more CPUs in SMP configuration 4 vs 1 3 supports more CPUs in SMP configuration
More cores 12 vs 4 Three times as many cores; run more applications at once
Much more l2 cache per core 1 MB/core vs 0.25 MB/core 4x more l2 cache per core
Significantly lower typical power consumption 93.44W vs 112.55W More than 15% lower typical power consumption
More threads 12 vs 4 Three times as many threads
Much lower annual home energy cost 27.7 $/year vs 41.29 $/year Around 35% lower annual home energy cost
Slightly better PassMark score 7,316 vs 6,383 Around 15% better PassMark score
Newer Nov, 2011 vs Jan, 2011 Release date 10 months later
Lower annual commercial energy cost 100.74 $/year vs 110.03 $/year Around 10% lower annual commercial energy cost

Benchmarks Real world tests of Core i5 2500K vs Opteron 6238

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
Opteron 6238
1,470 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i5 2500K  vs
Opteron 6238 
Clock speed 3.3 GHz 2.6 GHz
Turbo clock speed 3.7 GHz 3.2 GHz
Cores Quad core Duodeca core
Socket type
LGA 1155
G34
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
Supplemental SSE3
AES

power consumption

TDP 95W 115W
Annual home energy cost 41.29 $/year 27.7 $/year
Annual commercial energy cost 110.03 $/year 100.74 $/year
Performance per watt 6.79 pt/W 1.11 pt/W
Typical power consumption 112.55W 93.44W

memory controller

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

details

Core i5 2500K  vs
Opteron 6238 
Threads 4 12
L2 cache 1 MB 12 MB
L2 cache per core 0.25 MB/core 1 MB/core
L3 cache 6 MB 16 MB
L3 cache per core 1.5 MB/core 1.33 MB/core
Manufacture process 32 nm 32 nm
Max CPUs 1 4
Clock multiplier 33 16
Operating temperature 5 - 72.6°C Unknown - 70.4°C

overclocking

Overclock popularity 3,179 0
Overclocked clock speed 4.98 GHz 3.88 GHz
Overclocked clock speed (Water) 4.88 GHz 2.9 GHz
Overclocked clock speed (Air) 4.98 GHz 3.88 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

bus

Architecture DMI HyperTransport 3.0
Number of links 1 4
Transfer rate 5,000 MT/s 6,400 MT/s
Intel Core i5 2500K
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AMD Opteron 6238
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