CPUBoss Review Our evaluation of X620 vs 940 among all 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

Sky Diver and Cloud Gate

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?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

4.5

CPUBoss Score

Combination of all six facets

Winner
AMD Phenom II X4 940 

CPUBoss recommends the AMD Phenom II X4 940  based on its performance.

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Front view of AMD Phenom II X4 940

AMD Phenom II X4 940

CPUBoss Winner

Differences What are the advantages of each

Front view of AMD Phenom II X620

Reasons to consider the
AMD Phenom II X620

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Much lower typical power consumption 36.56W vs 101.56W 2.8x lower typical power consumption
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Much lower annual home energy cost 10.84 $/year vs 30.11 $/year 2.8x lower annual home energy cost
Much lower annual commercial energy cost 39.42 $/year vs 109.5 $/year 2.8x lower annual commercial energy cost
Better performance per watt 2.46 pt/W vs 1.19 pt/W More than 2x better performance per watt
Slightly better PassMark (Single core) score 1,174 vs 1,026 Around 15% better PassMark (Single core) score
Newer May, 2010 vs Jan, 2009 Release date over 1 years later
Front view of AMD Phenom II X4 940

Reasons to consider the
AMD Phenom II X4 940

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More cores 4 vs 2 Twice as many cores; run more applications at once
Better overclocked clock speed (Air) 3.72 GHz vs 3.1 GHz More than 20% better overclocked clock speed (Air)
Better PassMark score 3,614 vs 2,189 More than 65% better PassMark score
More threads 4 vs 2 Twice as many threads
Better overclocked clock speed (Water) 3.83 GHz vs 3.1 GHz Around 25% better overclocked clock speed (Water)

Benchmarks Real world tests of Phenom II X620 vs X4 940

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Phenom II X620  vs
X4 940 
Clock speed 3.1 GHz 3 GHz
Cores Dual core Quad core
Socket type
S1
AM2+
Is unlocked Yes Yes

features

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

power consumption

TDP 45W 125W
Annual home energy cost 10.84 $/year 30.11 $/year
Annual commercial energy cost 39.42 $/year 109.5 $/year
Performance per watt 2.46 pt/W 1.19 pt/W
Typical power consumption 36.56W 101.56W

details

Phenom II X620  vs
X4 940 
Architecture x86-64 x86-64
Threads 2 4
L2 cache 2 MB 2 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.1 GHz 3.72 GHz
Overclocked clock speed (Water) 3.1 GHz 3.83 GHz
Overclocked clock speed (Air) 3.1 GHz 3.72 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

bus

Clock speed 1,800 MHz 1,800 MHz
AMD Phenom II X620
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AMD Phenom II X4 940
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