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Differences What are the advantages of each

Front view of AMD FX 6300

Reasons to consider the
AMD FX 6300

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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
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 Athlon II X4 645 vs the FX 6300.

Benchmarks Real world tests of FX 6300 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

FX 6300
2,290,000 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

FX 6300  vs
Athlon II X4 645 
Clock speed 3.5 GHz 3.1 GHz
Cores Hexa core Quad core
Socket type
AM3+
AM3
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
AVX 1.1
SSE2
F16C
MMX
XOP
AVX
SSE3
SSE
ABM
BMI1
CLMUL
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
CVT16
AMD-V
3DNow!
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

integrated graphics

GPU None None
Label N/A N/A
Latest DirectX N/A N/A
Number of displays supported N/A N/A
GPU clock speed N/A N/A
Turbo clock speed N/A N/A
3DMark06 N/A N/A

details

FX 6300  vs
Athlon II X4 645 
Architecture x86-64 x86-64
Threads 6 4
L2 cache 6 MB 2 MB
L2 cache per core 1 MB/core 0.5 MB/core
L3 cache 8 MB 0.5 MB
L3 cache per core 1.33 MB/core 0.13 MB/core
Manufacture process 32 nm 45 nm
Max CPUs 1 1
Voltage range 0.8 - 1.43V 1.05 - 1.4V
Operating temperature Unknown - 62.5°C Unknown - 71°C

overclocking

Overclock popularity 82 15
Overclocked clock speed 4.75 GHz 3.67 GHz
Overclocked clock speed (Water) 4.82 GHz 3.1 GHz
PassMark (Overclocked) 7,541 2,068.5
Overclocked clock speed (Air) 4.75 GHz 3.67 GHz

power consumption

TDP 95W 95W
Annual home energy cost 22.89 $/year 44.01 $/year
Annual commercial energy cost 83.22 $/year 121.5 $/year
Performance per watt 9.84 pt/W 1.08 pt/W
Typical power consumption 77.19W 122.78W

bus

Clock speed 2,600 MHz 2,000 MHz
AMD FX 6300
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AMD Athlon II X4 645
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