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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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Is unlocked Yes vs No Somewhat common; An unlocked multiplier allows for easier overclocking
Front view of AMD Phenom II P840

Reasons to consider the
AMD Phenom II P840

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CPUBoss is not aware of any important advantages of the P840 vs the X620 Black Edition.

Benchmarks Real world tests of Phenom II X620 vs P840

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Phenom II X620  vs
P840 
Clock speed 3.1 GHz 1.9 GHz
Cores Dual core Tri core
Socket type
S1
Is unlocked Yes No

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 35W
Annual home energy cost 10.84 $/year 8.43 $/year
Performance per watt 2.46 pt/W 2.3 pt/W
Typical power consumption 36.56W 28.44W

details

Phenom II X620  vs
P840 
Architecture x86-64 x86-64
Threads 2 3
L2 cache 2 MB 2 MB
L2 cache per core 1 MB/core 0.67 MB/core
Manufacture process 45 nm 45 nm
Max CPUs 1 1

overclocking

Overclocked clock speed 3.1 GHz 1.9 GHz
Overclocked clock speed (Water) 3.1 GHz 1.9 GHz
Overclocked clock speed (Air) 3.1 GHz 1.9 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 P840
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