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Differences What are the advantages of each

Front view of Intel Atom Z515

Reasons to consider the
Intel Atom Z515

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Much lower typical power consumption 1.14W vs 152.93W 134.4x lower typical power consumption
Much lower annual home energy cost 0.34 $/year vs 54.06 $/year 160.3x lower annual home energy cost
Much better performance per watt 6.36 pt/W vs 1.08 pt/W Around 6x better performance per watt
Much lower annual commercial energy cost 1.23 $/year vs 152.42 $/year 124.3x lower annual commercial energy cost
Front view of AMD Phenom II X4 965

Reasons to consider the
AMD Phenom II X4 965

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Much higher clock speed 3.4 GHz vs 1.2 GHz More than 2.8x higher clock speed
Much more l2 cache 2 MB vs 0.5 MB 4x more l2 cache; more data can be stored in the l2 cache for quick access later
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Significantly better PassMark score 5,916 vs 218 Around 27.2x better PassMark score
More cores 4 vs 1 3 more cores; run more applications at once
More threads 4 vs 2 Twice as many threads
Newer Nov, 2009 vs Apr, 2009 Release date 7 months later

Benchmarks Real world tests of Atom Z515 vs Phenom II X4 965

PassMark Data courtesy Passmark

Specifications Full list of technical specs


Atom Z515  vs
Phenom II X4 965 
Clock speed 1.2 GHz 3.4 GHz
Cores Single core Quad core
Socket type


Has a NX bit Yes Yes
Has virtualization support No Yes
Instruction set extensions
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 1.4W 140W
Annual home energy cost 0.34 $/year 54.06 $/year
Annual commercial energy cost 1.23 $/year 152.42 $/year
Performance per watt 6.36 pt/W 1.08 pt/W
Typical power consumption 1.14W 152.93W


Atom Z515  vs
Phenom II X4 965 
Architecture x86 x86-64
Threads 2 4
L2 cache 0.5 MB 2 MB
L2 cache per core 0.5 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Transistor count 47,000,000 758,000,000
Max CPUs 1 1
Clock multiplier 12 17

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


Clock speed 400 MHz 2,000 MHz
Intel Atom Z515
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AMD Phenom II X4 965
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