Core 2 Quad Q9400s vs Core 2 Duo T6400

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Primary details

Comparing Core 2 Duo T6400 and Core 2 Quad Q9400s processor market type (desktop or notebook), architecture, sales start time and price.

Place in the rankingnot ratednot rated
Place by popularitynot in top-100not in top-100
Market segmentLaptopDesktop processor
SeriesIntel Core 2 Duono data
Architecture codenamePenryn (2008−2011)Yorkfield (2007−2009)
Release date1 January 2009 (15 years ago)18 January 2009 (15 years ago)

Detailed specifications

Core 2 Duo T6400 and Core 2 Quad Q9400s basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores2 (Dual-core)4 (Quad-Core)
Threads24
Base clock speed2 GHz2.66 GHz
Boost clock speed2 GHz0.67 GHz
Bus rate800 MHz1333 MHz
L1 cacheno data64 KB (per core)
L2 cache2 MB6 MB (shared)
L3 cache2 MB L2 Cache0 KB
Chip lithography45 nm45 nm
Die sizeno data2x 82 mm2
Maximum core temperature105 °Cno data
Maximum case temperature (TCase)no data76 °C
Number of transistorsno data456 million
64 bit support++
Windows 11 compatibility--
VID voltage range1V-1.25V0.85V-1.3625V

Compatibility

Information on Core 2 Duo T6400 and Core 2 Quad Q9400s compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configurationno data1
SocketPGA478LGA775
Power consumption (TDP)35 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo T6400 and Core 2 Quad Q9400s. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)++
Turbo Boost Technology--
Hyper-Threading Technology--
Idle Statesno data+
Thermal Monitoring-+
Demand Based Switching--
FSB parityno data-

Security technologies

Core 2 Duo T6400 and Core 2 Quad Q9400s technologies aimed at improving security, for example, by protecting against hacks.

TXT-+
EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo T6400 and Core 2 Quad Q9400s are enumerated here.

VT-dno data+
VT-x-+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo T6400 and Core 2 Quad Q9400s. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesno dataDDR1, DDR2, DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataOn certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo T6400 and Core 2 Quad Q9400s.

PCIe versionno data2.0

Pros & cons summary


Physical cores 2 4
Threads 2 4
Power consumption (TDP) 35 Watt 65 Watt

Core 2 Duo T6400 has 85.7% lower power consumption.

Core 2 Quad Q9400s, on the other hand, has 100% more physical cores and 100% more threads.

We couldn't decide between Core 2 Duo T6400 and Core 2 Quad Q9400s. We've got no test results to judge.

Be aware that Core 2 Duo T6400 is a notebook processor while Core 2 Quad Q9400s is a desktop one.


Should you still have questions on choice between Core 2 Duo T6400 and Core 2 Quad Q9400s, ask them in Comments section, and we shall answer.

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Intel Core 2 Duo T6400
Core 2 Duo T6400
Intel Core 2 Quad Q9400s
Core 2 Quad Q9400s

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Community ratings

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3 88 votes

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3.5 23 votes

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Questions & comments

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