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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 0 GHz Compared to all cpus, 3.7 GHz turbo clock speed is just OK
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Significantly better geekbench 3 single core score 2,994 vs 1,884 Around 60% better geekbench 3 single core score
Much better overclocked clock speed (Air) 5.01 GHz vs 4.27 GHz More than 15% better overclocked clock speed (Air)
Significantly lower typical power consumption 112.55W vs 133.74W More than 15% lower typical power consumption
Significantly better performance per watt 5.92 pt/W vs 2.15 pt/W More than 2.8x better performance per watt
Better cinebench r10 32Bit 1-core score 5,860 vs 4,289 More than 35% better cinebench r10 32Bit 1-core score
Better geekbench 2 (32-bit) score 10,319 vs 6,291 Around 65% better geekbench 2 (32-bit) score
Better geekbench 3 Multi-Core score 9,382 vs 6,486 Around 45% better geekbench 3 Multi-Core score
Much better overclocked clock speed (Water) 4.74 GHz vs 3.7 GHz Around 30% better overclocked clock speed (Water)
Significantly lower annual commercial energy cost 110.03 $/year vs 144.19 $/year Around 25% lower annual commercial energy cost
Better cinebench r10 32Bit score 20,381 vs 15,622 More than 30% better cinebench r10 32Bit score
Front view of AMD Phenom II X4 Black 980

Reasons to consider the
AMD Phenom II X4 Black 980

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Significantly higher clock speed 3.7 GHz vs 3.3 GHz More than 10% higher clock speed
More l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
More l2 cache per core 0.5 MB/core vs 0.25 MB/core 2x more l2 cache per core
Newer May, 2011 vs Jan, 2011 Release date 4 months later
Lower annual home energy cost 39.65 $/year vs 41.29 $/year Around 5% lower annual home energy cost

Benchmarks Real world tests of Core i5 2500K vs Phenom II X4 Black 980

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench (32-bit) Data courtesy Primate Labs

3D Mark 11 (Physics)

Cinebench R11.5

Cinebench R11.5 (Single Core)

sysmark 2007 (overall)

sysmark 2007 (3d)

Reviews Word on the street

Core i5 2500K  vs Phenom II X4 Black 980 

9.0
8.0
In terms of 3D performance, the detail spec changes include an upgrade from DX10 to DX10.
Core i5 2500K

Specifications Full list of technical specs

summary

Core i5 2500K  vs
Phenom II X4 Black 980 
Clock speed 3.3 GHz 3.7 GHz
Turbo clock speed 3.7 GHz 0 GHz
Cores Quad core Quad core
Socket type
LGA 1155
AM3
Is unlocked Yes Yes

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 125W
Annual home energy cost 41.29 $/year 39.65 $/year
Annual commercial energy cost 110.03 $/year 144.19 $/year
Performance per watt 5.92 pt/W 2.15 pt/W
Peak power consumption 125.6W 164.6W
Typical power consumption 112.55W 133.74W

details

Core i5 2500K  vs
Phenom II X4 Black 980 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 1 MB 2 MB
L2 cache per core 0.25 MB/core 0.5 MB/core
L3 cache 6 MB 6 MB
L3 cache per core 1.5 MB/core 1.5 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1

overclocking

Overclock popularity 3,179 29
Overclocked clock speed 5.01 GHz 4.27 GHz
Overclocked clock speed (Water) 4.74 GHz 3.7 GHz
Overclocked clock speed (Air) 5.01 GHz 4.27 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
Intel Core i5 2500K
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AMD Phenom II X4 Black 980
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