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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
Much higher clock speed 2.8 GHz vs 2.2 GHz More than 25% higher clock speed
More cores 2 vs 1 Twice as many cores; run more applications at once
More threads 2 vs 1 Twice as many threads
Significantly higher Maximum operating temperature 64.1 °C vs 60.4 °C More than 5% higher Maximum operating temperature
Much better overclocked clock speed (Water) 4.25 GHz vs 3.12 GHz More than 35% better overclocked clock speed (Water)
Front view of Intel Celeron M 450

Reasons to consider the
Intel Celeron M 450

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Much newer manufacturing process 65 nm vs 90 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better performance per watt 2.63 pt/W vs 0.94 pt/W More than 2.8x better performance per watt
Much lower typical power consumption 28.44W vs 77.19W 2.7x lower typical power consumption
Much lower annual commercial energy cost 30.66 $/year vs 83.22 $/year 2.7x lower annual commercial energy cost
Much lower annual home energy cost 8.43 $/year vs 22.89 $/year 2.7x lower annual home energy cost
Better overclocked clock speed (Air) 3.57 GHz vs 3.52 GHz Almost the same
Newer Aug, 2008 vs Apr, 2005 Release date over 3 years later

Benchmarks Real world tests of Pentium D 820 vs Celeron M 450

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 M 450
92,100 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench

Specifications Full list of technical specs

summary

Pentium D 820  vs
Celeron M 450 
Clock speed 2.8 GHz 2.2 GHz
Cores Dual core Single core
Socket type
LGA 775
478
Slot 1
M

features

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

power consumption

TDP 95W 35W
Annual home energy cost 22.89 $/year 8.43 $/year
Annual commercial energy cost 83.22 $/year 30.66 $/year
Performance per watt 0.94 pt/W 2.63 pt/W
Typical power consumption 77.19W 28.44W

memory controller

Memory controller Built-in Built-in
Supports ECC No No

details

Pentium D 820  vs
Celeron M 450 
Architecture x86-64 x86-64
Threads 2 1
L2 cache 2 MB 1 MB
L2 cache per core 1 MB/core 1 MB/core
Manufacture process 90 nm 65 nm
Transistor count 230,000,000 105,000,000
Max CPUs 1 1
Clock multiplier 14 11
Voltage range 1.2 - 1.4V 1 - 1.34V
Operating temperature Unknown - 64.1°C Unknown - 60.4°C

overclocking

Overclocked clock speed 3.52 GHz 3.57 GHz
Overclocked clock speed (Water) 4.25 GHz 3.12 GHz
PassMark (Overclocked) 908.7 1,248.8
Overclocked clock speed (Air) 3.52 GHz 3.57 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 M 450
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