CPUBoss Review Our evaluation of E8400 vs Z520 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

5.8

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Duo E8400 

CPUBoss recommends the Intel Core2 Duo E8400  based on its performance, single-core performance and value.

See full details

Cast your vote Do you agree or disagree with CPUBoss?

Thanks for adding your opinion. Follow us on Facebook to stay up to date with the latest news!
VS

Differences What are the advantages of each

Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

Report a correction
Much more l2 cache 6 MB vs 0.5 MB 12x more l2 cache; more data can be stored in the l2 cache for quick access later
Much higher clock speed 3 GHz vs 1.33 GHz More than 2.2x higher clock speed
Much better geekbench 2 (32-bit) score 2,826 vs 415 More than 6.8x better geekbench 2 (32-bit) score
Much more l2 cache per core 3 MB/core vs 0.5 MB/core 6x more l2 cache per core
More advanced architecture x86-64 vs x86 A 64-bit architecture allows more RAM to be installed and accessed by the processor
Much better overclocked clock speed (Air) 4.22 GHz vs 1.6 GHz Around 2.8x better overclocked clock speed (Air)
Much better PassMark (Single core) score 1,251 vs 193 Around 6.5x better PassMark (Single core) score
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much better overclocked clock speed (Water) 4.23 GHz vs 1.33 GHz Around 3.2x better overclocked clock speed (Water)
Better PassMark score 2,160 vs 215 More than 10x better PassMark score
Better performance per dollar 0.67 pt/$ vs 0.5 pt/$ More than 30% better performance per dollar
More cores 2 vs 1 Twice as many cores; run more applications at once
Front view of Intel Atom Z520

Reasons to consider the
Intel Atom Z520

Report a correction
Much lower typical power consumption 1.63W vs 52.81W 32.5x lower typical power consumption
Much better performance per watt 10.05 pt/W vs 1.83 pt/W Around 5.5x better performance per watt
Much lower annual home energy cost 0.48 $/year vs 15.66 $/year 32.5x lower annual home energy cost
Much lower annual commercial energy cost 1.75 $/year vs 56.94 $/year 32.5x lower annual commercial energy cost
Newer Apr, 2008 vs Jan, 2008 Release date 3 months later

Benchmarks Real world tests of Core2 Duo E8400 vs Atom Z520

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

Core2 Duo E8400
128,000 MB/s
Atom Z520
20,550 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo E8400  vs
Atom Z520 
Clock speed 3 GHz 1.33 GHz
Cores Dual core Single core
Socket type
LGA 775
441

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 65W 2W
Annual home energy cost 15.66 $/year 0.48 $/year
Annual commercial energy cost 56.94 $/year 1.75 $/year
Performance per watt 1.83 pt/W 10.05 pt/W
Typical power consumption 52.81W 1.63W

details

Core2 Duo E8400  vs
Atom Z520 
Architecture x86-64 x86
Threads 2 2
L2 cache 6 MB 0.5 MB
L2 cache per core 3 MB/core 0.5 MB/core
Manufacture process 45 nm 45 nm
Transistor count 410,000,000 47,000,000
Max CPUs 1 1
Clock multiplier 9 10
Voltage range 0.85 - 1.36V 0.75 - 1.1V

overclocking

Overclocked clock speed 4.22 GHz 1.6 GHz
Overclocked clock speed (Water) 4.23 GHz 1.33 GHz
Overclocked clock speed (Air) 4.22 GHz 1.6 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

Architecture FSB FSB
Number of links 1 1
Clock speed 1,333 MHz 533 MHz
Intel Core2 Duo E8400
Report a correction
Intel Atom Z520
Report a correction

Read more

Comments

comments powered by Disqus