CPUBoss Review Our evaluation of 820 vs E3400 among desktop 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

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

3.5

CPUBoss Score

Combination of all six facets

Winner
Intel Celeron E3400 

CPUBoss recommends the Intel Celeron E3400  based on its performance.

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VS

Differences What are the advantages of each

Front view of Intel Pentium D 820

Reasons to consider the
Intel Pentium D 820

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Much more l2 cache 2 MB vs 1 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Higher clock speed 2.8 GHz vs 2.6 GHz Around 10% higher clock speed
Much more l2 cache per core 1 MB/core vs 0.5 MB/core 2x more l2 cache per core
Much better overclocked clock speed (Water) 4.25 GHz vs 2.6 GHz Around 65% better overclocked clock speed (Water)
Front view of Intel Celeron E3400

Reasons to consider the
Intel Celeron E3400

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Much newer manufacturing process 45 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better geekbench 2 (32-bit) score 2,275 vs 1,268 Around 80% better geekbench 2 (32-bit) score
Supports dynamic frequency scaling Yes vs No Somewhat common; Allows for maximum performance when needed, while conserving power and minimizing heat production when not needed
Much better performance per watt 1.64 pt/W vs 0.94 pt/W More than 75% better performance per watt
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Much higher Maximum operating temperature 74.1 °C vs 64.1 °C More than 15% higher Maximum operating temperature
Much better overclocked clock speed (Air) 3.85 GHz vs 3.52 GHz Around 10% better overclocked clock speed (Air)
Newer Jan, 2010 vs Apr, 2005 Release date over 4 years later
Significantly lower annual home energy cost 15.66 $/year vs 22.89 $/year More than 30% lower annual home energy cost
Significantly lower annual commercial energy cost 56.94 $/year vs 83.22 $/year More than 30% lower annual commercial energy cost

Benchmarks Real world tests of Pentium D 820 vs Celeron E3400

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

Pentium D 820
100,200 MB/s
Celeron E3400
110,600 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

Specifications Full list of technical specs

summary

Pentium D 820  vs
Celeron E3400 
Clock speed 2.8 GHz 2.6 GHz
Cores Dual core Dual core
Socket type
LGA 775

features

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

power consumption

TDP 95W 65W
Annual home energy cost 22.89 $/year 15.66 $/year
Annual commercial energy cost 83.22 $/year 56.94 $/year
Performance per watt 0.94 pt/W 1.64 pt/W
Typical power consumption 77.19W 52.81W

details

Pentium D 820  vs
Celeron E3400 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 2 MB 1 MB
L2 cache per core 1 MB/core 0.5 MB/core
Manufacture process 90 nm 45 nm
Max CPUs 1 1
Clock multiplier 14 13
Voltage range 1.2 - 1.4V 0.85 - 1.36V
Operating temperature Unknown - 64.1°C Unknown - 74.1°C

overclocking

Overclocked clock speed 3.52 GHz 3.85 GHz
Overclocked clock speed (Water) 4.25 GHz 2.6 GHz
Overclocked clock speed (Air) 3.52 GHz 3.85 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 800 MHz 800 MHz
Intel Pentium D 820
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Intel Celeron E3400
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