CPUBoss Review Our evaluation of 945 vs E8400 among desktop CPUs

Performance

Benchmark performance using all cores
Pentium D 945
4.1
Core2 Duo E8400
5.1
Core2 Quad Q6600
5.8
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance
Pentium D 945
2.6
Core2 Duo E8400
4.5
Core2 Quad Q6600
3.5
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics
Pentium D 945
0.0
Core2 Duo E8400
0.0
Core2 Quad Q6600
0.0
Fire Strike

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing
Pentium D 945
0.0
Core2 Duo E8400
0.0
Core2 Quad Q6600
0.0
CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?
Pentium D 945
4.6
Core2 Duo E8400
5.2
Core2 Quad Q6600
4.7
Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?
Pentium D 945
n.d.
Core2 Duo E8400
n.d.
Core2 Quad Q6600
n.d.
Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more
3.8

CPUBoss Score

Combination of all six facets
Pentium D 945
2.9
Core2 Duo E8400
3.8
Core2 Quad Q6600
3.5

Winner
Intel Core2 Duo E8400 

CPUBoss recommends the Intel Core2 Duo E8400  based on its performance.

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VS

Intel Pentium D 945

Front view of Intel Pentium D 945
Front view of Intel Core2 Duo E8400

Intel Core2 Duo E8400

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Differences What are the advantages of each

Front view of Intel Pentium D 945

Reasons to consider the
Intel Pentium D 945

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Significantly higher clock speed 3.4 GHz vs 3 GHz Around 15% higher clock speed
Better overclocked clock speed (Water) 4.59 GHz vs 4.23 GHz Around 10% better overclocked clock speed (Water)
Front view of Intel Core2 Duo E8400

Reasons to consider the
Intel Core2 Duo E8400

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Much better geekbench 2 (32-bit) score 2,826 vs 1,571 Around 80% better geekbench 2 (32-bit) score
Much newer manufacturing process 45 nm vs 65 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Much better performance per watt 1.83 pt/W vs 1.14 pt/W More than 60% better performance per watt
Has virtualization support Yes vs No Somewhat common; Boosts performance of virtual machines
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Much lower typical power consumption 52.81W vs 77.19W More than 30% lower typical power consumption
Much higher Maximum operating temperature 72.4 °C vs 63.4 °C Around 15% higher Maximum operating temperature
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
Newer Jan, 2008 vs Jul, 2006 Release date over 1 years later

Benchmarks Real world tests of Pentium D 945 vs Core2 Duo E8400

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Pentium D 945
1,678
Core2 Duo E8400
2,982

GeekBench 3 (Single core) Data courtesy Primate Labs

Pentium D 945
932
Core2 Duo E8400
1,625

GeekBench 3 (AES single core) Data courtesy Primate Labs

Pentium D 945
122,800 MB/s
Core2 Duo E8400
128,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

Pentium D 945
1,571
Core2 Duo E8400
2,826

GeekBench (64-bit) Data courtesy Primate Labs

Pentium D 945
2,830
Core2 Duo E8400
3,092

GeekBench

Pentium D 945
2,830
Core2 Duo E8400
4,794

Specifications Full list of technical specs

summary

 Pentium D 945  vs
Core2 Duo E8400 
Clock speed 3.4 GHz 3 GHz
Cores Dual core Dual core
Socket type
LGA 775

features
Has a NX bit Yes Yes
Supports trusted computing No Yes
Has virtualization support No Yes
Instruction set extensions
SSE2
MMX
SSE3
SSE
SSE4.1
Supplemental SSE3
Supports dynamic frequency scaling Yes 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 1.14 pt/W 1.83 pt/W
Typical power consumption 77.19W 52.81W

bus
Architecture FSB FSB
Number of links 1 1
Clock speed 800 MHz 1,333 MHz

details

 Pentium D 945  vs
Core2 Duo E8400 
Architecture x86-64 x86-64
Threads 2 2
L2 cache 4 MB 6 MB
L2 cache per core 2 MB/core 3 MB/core
Manufacture process 65 nm 45 nm
Transistor count 376,000,000 410,000,000
Max CPUs 1 1
Clock multiplier 17 9
Voltage range 1.2 - 1.34V 0.85 - 1.36V
Operating temperature Unknown - 63.4°C Unknown - 72.4°C

overclocking
Overclock popularity 9 125
Overclocked clock speed 4.22 GHz 4.22 GHz
Overclocked clock speed (Water) 4.59 GHz 4.23 GHz
Overclocked clock speed (Air) 4.22 GHz 4.22 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
Intel Pentium D 945
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Intel Core2 Duo E8400
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