CPUBoss Review Our evaluation of 640 vs 2800+ among desktop CPUs (over 75W)

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

2.1

CPUBoss Score

Combination of all six facets

Winner
AMD Athlon II X4 640 

CPUBoss recommends the AMD Athlon II X4 640  based on its .

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VS

Differences What are the advantages of each

Front view of AMD Athlon II X4 640

Reasons to consider the
AMD Athlon II X4 640

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Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Front view of AMD Athlon 2800+

Reasons to consider the
AMD Athlon 2800+

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CPUBoss is not aware of any important advantages of the Athlon 2800+ vs the Athlon II X4 640.

Benchmarks Real world tests of Athlon II X4 640 vs 2800+

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Athlon II X4 640  vs
2800+ 
Clock speed 3 GHz 1.8 GHz
Cores Quad core Single core
Socket type
AM3
754
462
Is unlocked No No

features

Has a NX bit Yes Yes
Has virtualization support Yes No
Instruction set extensions
SSE4a
SSE2
MMX
SSE3
SSE
3DNow!
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 95W 89W
Annual home energy cost 22.89 $/year 21.44 $/year
Annual commercial energy cost 83.22 $/year 77.96 $/year
Performance per watt 1.54 pt/W 0.42 pt/W
Typical power consumption 77.19W 72.31W

bus

Clock speed 2,000 MHz 266 MHz

details

Athlon II X4 640  vs
2800+ 
Architecture x86-64 x86-64
Threads 4 1
L2 cache 2 MB 1 MB
L2 cache per core 0.5 MB/core 1 MB/core
L3 cache 0 MB 0 MB
L3 cache per core 0 MB/core 0 MB/core
Manufacture process 45 nm 130 nm
Max CPUs 1 1
Operating temperature Unknown - 71°C Unknown - 70°C

overclocking

Overclock popularity 36 1
Overclock review score 4.5 0
Overclocked clock speed 3.57 GHz 2.57 GHz
Overclocked clock speed (Water) 3.89 GHz 2.13 GHz
Overclocked clock speed (Air) 3.57 GHz 2.57 GHz

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
AMD Athlon II X4 640
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AMD Athlon 2800+
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