CPUBoss Review Our evaluation of Q9400 vs 7850K among desktop CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Fire Strike

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

10

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Quad Q9400 

CPUBoss recommends the Intel Core2 Quad Q9400  based on its .

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Differences What are the advantages of each

Front view of Intel Core2 Quad Q9400

Reasons to consider the
Intel Core2 Quad Q9400

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CPUBoss is not aware of any important advantages of the Intel Core2 Quad Q9400 vs the AMD A10 7850K.

Front view of AMD A10 7850K

Reasons to consider the
AMD A10 7850K

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Much higher clock speed 3.7 GHz vs 2.66 GHz Around 40% higher clock speed
Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much newer manufacturing process 28 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Newer Jan, 2014 vs Jul, 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
Higher Maximum operating temperature 72.4 °C vs 71.4 °C Almost the same

Benchmarks Real world tests of Core2 Quad Q9400 vs A10 7850K

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

Core2 Quad Q9400
114,000 MB/s
A10 7850K
2,370,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Quad Q9400  vs
A10 7850K 
Clock speed 2.66 GHz 3.7 GHz
Cores Quad core Quad core
Socket type
LGA 775
FM2+

features

Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
F16C
MMX
AVX
SSE3
SSE
BMI1
AMD64
SSE4.1
FMA4
FMA3
SSE4.2
AMD-V
Supplemental SSE3
AES
TBM
Supports dynamic frequency scaling Yes Yes

details

Core2 Quad Q9400  vs
A10 7850K 
Architecture x86-64 x86-64
Threads 4 4
L2 cache 6 MB 4 MB
L2 cache per core 1.5 MB/core 1 MB/core
Manufacture process 45 nm 28 nm
Max CPUs 1 1
Operating temperature Unknown - 71.4°C Unknown - 72.4°C

integrated graphics

GPU None GPU
Label N/A Radeon™ R7 Series
Latest DirectX N/A 11.0

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 1.51 pt/W 9.84 pt/W
Typical power consumption 77.19W 52.81W
Intel Core2 Quad Q9400
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AMD A10 7850K
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