CPUBoss Review Our evaluation of T9300 vs P8400 among laptop CPUs (over 15W)

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

2.2

CPUBoss Score

Combination of all six facets

Winner
Intel Core2 Duo P8400 

CPUBoss recommends the Intel Core2 Duo P8400  based on its power consumption and value.

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VS

Differences What are the advantages of each

Front view of Intel Core2 Duo T9300

Reasons to consider the
Intel Core2 Duo T9300

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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 2.5 GHz vs 2.26 GHz More than 10% higher clock speed
Better geekbench 2 (64-bit) score 2,640 vs 2,328 Around 15% better geekbench 2 (64-bit) score
Slightly better overclocked clock speed (Air) 2.69 GHz vs 2.54 GHz More than 5% better overclocked clock speed (Air)
Better overclocked clock speed (Water) 2.5 GHz vs 2.26 GHz More than 10% better overclocked clock speed (Water)
Front view of Intel Core2 Duo P8400

Reasons to consider the
Intel Core2 Duo P8400

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Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Lower typical power consumption 20.31W vs 28.44W Around 30% lower typical power consumption
Newer Jul, 2008 vs Jan, 2008 Release date 6 months later
Slightly better performance per dollar 1.1 pt/$ vs 0.75 pt/$ More than 45% better performance per dollar
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 T9300 vs P8400

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 T9300
102,200 MB/s
Core2 Duo P8400
95,500 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

GeekBench (64-bit) Data courtesy Primate Labs

GeekBench

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core2 Duo T9300  vs
P8400 
Clock speed 2.5 GHz 2.26 GHz
Cores Dual core Dual core
Socket type
479
P

features

Has a NX bit Yes Yes
Supports trusted computing No Yes
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 35W 25W
Annual home energy cost 8.43 $/year 6.02 $/year
Performance per watt 3.44 pt/W 4.4 pt/W
Typical power consumption 28.44W 20.31W

bus

Architecture FSB FSB
Number of links 1 1
Clock speed 800 MHz 1,066 MHz

details

Core2 Duo T9300  vs
P8400 
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 12 8
Voltage range 1 - 1.25V 1.05 - 1.15V

overclocking

Overclocked clock speed 2.69 GHz 2.54 GHz
Overclocked clock speed (Water) 2.5 GHz 2.26 GHz
PassMark (Overclocked) 1,272.8 887.7
Overclocked clock speed (Air) 2.69 GHz 2.54 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 Core2 Duo T9300
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Intel Core2 Duo P8400
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