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Differences What are the advantages of each

Front view of AMD Phenom II X4 965

Reasons to consider the
AMD Phenom II X4 965

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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
Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Much more l3 cache 6 MB vs 0.5 MB 12x more l3 cache; more data can be stored in the l3 cache for quick access later
Much higher clock speed 3.4 GHz vs 2.7 GHz More than 25% higher clock speed
More cores 4 vs 2 Twice as many cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Much more l3 cache per core 1.5 MB/core vs 0.25 MB/core 6x more l3 cache per core
Much better overclocked clock speed (Air) 4.05 GHz vs 3.5 GHz More than 15% better overclocked clock speed (Air)
Much better overclocked clock speed (Water) 4.22 GHz vs 2.7 GHz More than 55% better overclocked clock speed (Water)
Front view of AMD A4 3400

Reasons to consider the
AMD A4 3400

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required
Much lower typical power consumption 52.81W vs 152.93W 2.9x lower typical power consumption
Much newer manufacturing process 32 nm vs 45 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better performance per watt 1.57 pt/W vs 1.08 pt/W More than 45% better performance per watt
Much higher Maximum operating temperature 71.5 °C vs 62 °C More than 15% higher Maximum operating temperature
Much lower annual home energy cost 15.66 $/year vs 54.06 $/year 3.5x lower annual home energy cost
Much lower annual commercial energy cost 56.94 $/year vs 152.42 $/year 2.7x lower annual commercial energy cost
Newer Sep, 2011 vs Nov, 2009 Release date over 1 years later

Benchmarks Real world tests of Phenom II X4 965 vs A4 3400

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

Phenom II X4 965
137,800 MB/s
A4 3400
112,400 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

3D Mark 11 (Physics)

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Phenom II X4 965  vs
A4 3400 
Clock speed 3.4 GHz 2.7 GHz
Turbo clock speed 0 GHz None
Cores Quad core Dual core
Socket type
AM3
FM1
Is unlocked Yes No

features

Has a NX bit Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
AMD64
AMD-V
3DNow!
Supports dynamic frequency scaling Yes Yes

integrated graphics

GPU None GPU
Label N/A Radeon™ HD 6410D
Latest DirectX N/A 11.0
GPU clock speed N/A 600 MHz

details

Phenom II X4 965  vs
A4 3400 
Architecture x86-64 x86-64
Threads 4 2
L2 cache 2 MB 1 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
L3 cache 6 MB 0.5 MB
L3 cache per core 1.5 MB/core 0.25 MB/core
Manufacture process 45 nm 32 nm
Transistor count 758,000,000 1,178,000,000
Max CPUs 1 1
Voltage range 0.85 - 1.43V 0.91 - 1.41V
Operating temperature Unknown - 62°C Unknown - 71.5°C

overclocking

Overclock popularity 22 10
Overclocked clock speed 4.05 GHz 3.5 GHz
Overclocked clock speed (Water) 4.22 GHz 2.7 GHz
PassMark (Overclocked) 3,136.7 1,356.5
Overclocked clock speed (Air) 4.05 GHz 3.5 GHz

power consumption

TDP 140W 65W
Annual home energy cost 54.06 $/year 15.66 $/year
Annual commercial energy cost 152.42 $/year 56.94 $/year
Performance per watt 1.08 pt/W 1.57 pt/W
Typical power consumption 152.93W 52.81W
AMD Phenom II X4 965
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AMD A4 3400
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