Core 2 Quad Q9400s: specs and benchmarks

Summary

Intel started Core 2 Quad Q9400s sales 18 January 2009. Based on an Yorkfield architecture, this desktop processor is primarily aimed at home systems. It has 4 cores and 4 threads, and is based on 45 nm manufacturing technology, with a maximum frequency of 666 MHz and a locked multiplier.

Compatibility-wise, this is LGA775 processor with a TDP of 65 Watt and a maximum temperature of 76 °C. It supports DDR1, DDR2, DDR3 memory.

Primary details

Core 2 Quad Q9400s processor market type (desktop or notebook), architecture, sales start time and pricing.

Place in the ranking	not rated
Place by popularity	not in top-100
Market segment	Desktop processor
Architecture codename	Yorkfield (2007−2009)
Release date	18 January 2009 (15 years ago)

Detailed specifications

Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.

Physical cores	4 (Quad-Core)
Threads	4
Base clock speed	2.66 GHz	of 4.7 GHz (FX-9590)
Boost clock speed	0.67 GHz	of 6.2 GHz (Core i9-14900KS)
Bus rate	1333 MHz
L1 cache	64 KB (per core)	of 80 KB (EPYC 9965)
L2 cache	6 MB (shared)	of 2 MB (Xeon 6980P)
L3 cache	0 KB	of 1152 MB (EPYC 9684X)
Chip lithography	45 nm	of 3 nm (Apple M3 Max 16-Core)
Die size	2x 82 mm2
Maximum case temperature (TCase)	76 °C	of 105 °C (Core i7-5950HQ)
Number of transistors	456 million	of 135,240 million (EPYC 9684X)
64 bit support	+
Windows 11 compatibility	-
VID voltage range	0.85V-1.3625V

Compatibility

Information on Core 2 Quad Q9400s compatibility with other computer components and devices: 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	1	of 8 (Opteron 842)
Socket	LGA775
Power consumption (TDP)	65 Watt	of 500 Watt (Xeon 6960P)

Technologies and extensions

Technological capabilities and additional instructions supported by 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	+
Thermal Monitoring	+
Demand Based Switching	-
FSB parity	-

Security technologies

Processor technologies aimed at improving security, for example, by protecting against hacks.

TXT	+
EDB	+

Virtualization technologies

Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.

VT-d	+
VT-x	+

Memory specs

Types, maximum amount and channel number of RAM supported by Core 2 Quad Q9400s's memory controller. Depending on the motherboard, higher memory frequency may be supported.

Supported memory types

DDR1, DDR2, DDR3

Graphics specifications

General parameters of a GPU integrated into Core 2 Quad Q9400s.

Integrated graphics card

On certain motherboards (Chipset feature)

Peripherals

Specifications and connection types of supported peripherals.

PCIe version

2.0

of 5.0 (Core i9-12900K)

Benchmark performance

Single-core and multi-core benchmark results of Core 2 Quad Q9400s. Overall benchmark performance is measured in points in 0-100 range, higher is better.

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