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Differences What are the advantages of each

Front view of Intel Core i5 3570K

Reasons to consider the
Intel Core i5 3570K

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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 645

Reasons to consider the
AMD Athlon II X4 645

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CPUBoss is not aware of any important advantages of the AMD Athlon II X4 645 vs the Intel Core i5 3570K.

Benchmarks Real world tests of Core i5 3570K vs Athlon II X4 645

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 3570K
2,650,000 MB/s
Athlon II X4 645
124,500 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Reviews Word on the street

Specifications Full list of technical specs

summary

Core i5 3570K  vs
Athlon II X4 645 
Clock speed 3.4 GHz 3.1 GHz
Cores Quad core Quad core
Socket type
LGA 1155
AM3
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 77W 95W
Annual home energy cost 38.81 $/year 44.01 $/year
Annual commercial energy cost 106 $/year 121.5 $/year
Performance per watt 4.69 pt/W 1.08 pt/W
Idle power consumption 67W 75W
Peak power consumption 121W 138.7W
Typical power consumption 107.5W 122.78W

details

Core i5 3570K  vs
Athlon II X4 645 
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 0.5 MB
L3 cache per core 1.5 MB/core 0.13 MB/core
Manufacture process 22 nm 45 nm
Max CPUs 1 1
Operating temperature Unknown - 67.4°C Unknown - 71°C

overclocking

Overclock popularity 470 15
Overclocked clock speed 4.59 GHz 3.67 GHz
Overclocked clock speed (Water) 4.71 GHz 3.1 GHz
PassMark (Overclocked) 5,406.6 2,068.5
Overclocked clock speed (Air) 4.59 GHz 3.67 GHz

integrated graphics

GPU GPU None
Label Intel® HD Graphics 4000 N/A
Latest DirectX 10.x N/A
Number of displays supported 3 N/A
GPU clock speed 650 MHz N/A
Turbo clock speed 1,150 MHz N/A
3DMark06 5,339.9 N/A
Intel Core i5 3570K
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AMD Athlon II X4 645
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