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Differences What are the advantages of each

Front view of AMD Phenom X3 8750

Reasons to consider the
AMD Phenom X3 8750

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Much more l3 cache 2 MB vs None Compared to all cpus, 2 MB l3 cache is just OK
Much 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 cores 3 vs 2 1 more cores; run more applications at once
More threads 3 vs 2 1 more threads
Much more l2 cache per core 0.67 MB/core vs 0.5 MB/core Around 35% more l2 cache per core
Higher Maximum operating temperature 71 °C vs 70 °C Almost the same
Front view of AMD A6 6400K

Reasons to consider the
AMD A6 6400K

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Much higher clock speed 3.9 GHz vs 2.4 GHz Around 65% higher clock speed
Much newer manufacturing process 32 nm vs 65 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
Much better overclocked clock speed (Air) 4.76 GHz vs 2.98 GHz Around 60% better overclocked clock speed (Air)
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Much better overclocked clock speed (Water) 5.16 GHz vs 2.4 GHz Around 2.2x better overclocked clock speed (Water)
Newer Jun, 2013 vs Apr, 2008 Release date over 5 years later
Significantly lower annual home energy cost 15.66 $/year vs 22.89 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 83.22 $/year More than 30% lower annual commercial energy cost

Benchmarks Real world tests of Phenom X3 8750 vs A6 6400K

GeekBench 3 (Multi-core) Data courtesy Primate Labs

A6 6400K
3,328

GeekBench 3 (Single core) Data courtesy Primate Labs

A6 6400K
2,108

GeekBench 3 (AES single core) Data courtesy Primate Labs

Phenom X3 8750
89,050 MB/s
A6 6400K
2,380,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

A6 6400K
4,094

GeekBench

A6 6400K
4,094

PassMark Data courtesy Passmark

A6 6400K
2,291

PassMark (Single Core)

A6 6400K
1,404

Specifications Full list of technical specs

summary

Phenom X3 8750  vs
A6 6400K 
Clock speed 2.4 GHz 3.9 GHz
Cores Tri core Dual core
Is unlocked Yes Yes

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
BMI1
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
ABM
CVT16
AMD-V
3DNow!
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 65W
Annual home energy cost 22.89 $/year 15.66 $/year
Annual commercial energy cost 83.22 $/year 56.94 $/year
Performance per watt 1.26 pt/W 7.25 pt/W
Typical power consumption 77.19W 52.81W

details

Phenom X3 8750  vs
A6 6400K 
Architecture x86-64 x86-64
Threads 3 2
L2 cache 2 MB 1 MB
L2 cache per core 0.67 MB/core 0.5 MB/core
L3 cache 2 MB None
Manufacture process 65 nm 32 nm
Max CPUs 1 1
Operating temperature Unknown - 71°C Unknown - 70°C

overclocking

Overclocked clock speed 2.98 GHz 4.76 GHz
Overclocked clock speed (Water) 2.4 GHz 5.16 GHz
Overclocked clock speed (Air) 2.98 GHz 4.76 GHz

integrated graphics

GPU None GPU
Label N/A Radeon™ HD 8470D
Latest DirectX N/A 11.0
GPU clock speed N/A 800 MHz
AMD Phenom X3 8750
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AMD A6 6400K
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