CPUBoss Review Our evaluation of T9400 vs P8400


Benchmark performance using all cores

3DMark06 (CPU), Passmark, GeekBench (32-bit) and GeekBench (64-bit)

Single-core Performance

Individual core benchmark performance

Passmark (Single Core)

Power Consumption

How much power does the processor require?



How does CPUBoss rank the features of each product?

Features and specifications that differ between products

CPUBoss Score

Performance, Single-core Performance, Power Consumption and Features

Intel Core2 Duo T9400 

CPUBoss recommends the Intel Core2 Duo T9400  based on its .

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Differences What are the advantages of each

Front view of Intel Core2 Duo T9400

Reasons to consider the
Intel Core2 Duo T9400

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Much more l2 cache 6 MB vs 3 MB 2x more l2 cache; more data can be stored in the l2 cache for quick access later
Much more l2 cache per core 3 MB/core vs 1.5 MB/core 2x more l2 cache per core
Higher clock speed 2.53 GHz vs 2.26 GHz More than 10% higher clock speed
Much better performance per dollar 11.51 pt/$ vs 5.57 pt/$ More than 2x better performance per dollar
Front view of Intel Core2 Duo P8400

Reasons to consider the
Intel Core2 Duo P8400

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Lower typical power consumption 20.31W vs 28.44W Around 30% lower typical power consumption
Lower annual home energy cost 6.02 $/year vs 8.43 $/year Around 30% lower annual home energy cost

Benchmarks Real world tests of Core2 Duo T9400 vs P8400

Specifications Full list of technical specs


Core2 Duo T9400  vs
Clock speed 2.53 GHz 2.26 GHz
Cores Dual core Dual core
Socket type
Is hyperthreaded No No


Has a NX bit Yes Yes
Supports trusted computing Yes Yes
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 35W 25W
Annual home energy cost 8.43 $/year 6.02 $/year
Performance per watt 8.86 pt/W 10.9 pt/W
Typical power consumption 28.44W 20.31W


Core2 Duo T9400  vs
Architecture x86-64 x86-64
Threads 2 2
L2 cache 6 MB 3 MB
L2 cache per core 3 MB/core 1.5 MB/core
Manufacture process 45 nm 45 nm
Transistor count 410,000,000 410,000,000
Max CPUs 1 1
Clock multiplier 9 8
Voltage range 1.05 - 1.16V 1.05 - 1.15V

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


Architecture FSB FSB
Number of links 1 1
Clock speed 1,066 MHz 1,066 MHz
Intel Core2 Duo T9400
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Intel Core2 Duo P8400
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