Core 2 Quad Q8400 vs Core 2 Extreme QX9650

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Primary details

Comparing Core 2 Extreme QX9650 and Core 2 Quad Q8400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the rankingnot rated2281
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorDesktop processor
Power efficiencyno data1.29
Architecture codenameYorkfield (2007−2009)Yorkfield (2007−2009)
Release dateNovember 2007 (17 years ago)19 April 2009 (15 years ago)

Detailed specifications

Core 2 Extreme QX9650 and Core 2 Quad Q8400 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 cores4 (Quad-Core)4 (Quad-Core)
Threads44
Base clock speed3 GHz2.66 GHz
Boost clock speed3 GHz0.67 GHz
Bus rate1333 MHz1333 MHz
L1 cache64K (per core)64 KB (per core)
L2 cache12 MB (shared)4 MB (shared)
L3 cache0 KB0 KB
Chip lithography45 nm45 nm
Die size2x 107 mm22x 82 mm2
Maximum case temperature (TCase)64 °C71 °C
Number of transistors820 million456 million
64 bit support++
Windows 11 compatibility--
Unlocked multiplier+-
VID voltage range0.85V-1.3625V0.85V-1.3625V

Compatibility

Information on Core 2 Extreme QX9650 and Core 2 Quad Q8400 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 configuration11
SocketLGA775FCLGA775,LGA775
Power consumption (TDP)130 Watt95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Extreme QX9650 and Core 2 Quad Q8400. 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

Core 2 Extreme QX9650 and Core 2 Quad Q8400 technologies aimed at improving security, for example, by protecting against hacks.

TXT--
EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Extreme QX9650 and Core 2 Quad Q8400 are enumerated here.

VT-x++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme QX9650 and Core 2 Quad Q8400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR1, DDR2, DDR3DDR1, 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 Extreme QX9650 and Core 2 Quad Q8400.

PCIe versionno data2.0

Pros & cons summary


Power consumption (TDP) 130 Watt 95 Watt

Core 2 Quad Q8400 has 36.8% lower power consumption.

We couldn't decide between Core 2 Extreme QX9650 and Core 2 Quad Q8400. We've got no test results to judge.


Should you still have questions on choice between Core 2 Extreme QX9650 and Core 2 Quad Q8400, ask them in Comments section, and we shall answer.

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Intel Core 2 Extreme QX9650
Core 2 Extreme QX9650
Intel Core 2 Quad Q8400
Core 2 Quad Q8400

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Community ratings

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4.1 124 votes

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Questions & comments

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