Core 2 Quad Q9400s vs Core 2 Duo T6400

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 ranking	not rated	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Desktop processor
Series	Intel Core 2 Duo	no data
Architecture codename	Penryn (2008−2011)	Yorkfield (2007−2009)
Release date	1 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 cores	2 (Dual-core)	4 (Quad-Core)
Threads	2	4
Base clock speed	2 GHz	2.66 GHz
Boost clock speed	2 GHz	0.67 GHz
Bus rate	800 MHz	1333 MHz
L1 cache	no data	64 KB (per core)
L2 cache	2 MB	6 MB (shared)
L3 cache	2 MB L2 Cache	0 KB
Chip lithography	45 nm	45 nm
Die size	no data	2x 82 mm2
Maximum core temperature	105 °C	no data
Maximum case temperature (TCase)	no data	76 °C
Number of transistors	no data	456 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	1V-1.25V	0.85V-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 configuration	no data	1
Socket	PGA478	LGA775
Power consumption (TDP)	35 Watt	65 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 States	no data	+
Thermal Monitoring	-	+
Demand Based Switching	-	-
FSB parity	no 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-d	no 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 types

no data

DDR1, DDR2, DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

On certain motherboards (Chipset feature)

Peripherals

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

PCIe version

no data

2.0

Pros & cons summary

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

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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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