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Intel Core 2 Quad Q9550 CPU

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Intel Core 2 Quad Q9550 chipset compatibility

A list of compatible chipsets was compiled from CPU support lists, published on our website.

ATI RS600Intel X48 Express
Intel 945GC ExpressNVIDIA GeForce 7050
Intel 975X ExpressNVIDIA GeForce 9300
Intel B43 ExpressNVIDIA GeForce 9400
Intel G31 ExpressNVIDIA nForce 430i
Intel G33 ExpressNVIDIA nForce 570i SLI
Intel G35 ExpressNVIDIA nForce 6 MCP
Intel G41 ExpressNVIDIA nForce 610i
Intel G43 ExpressNVIDIA nForce 630i
Intel G45 ExpressNVIDIA nForce 680i SLI
Intel G965 ExpressNVIDIA nForce 740i SLI
Intel P31 ExpressNVIDIA nForce 750i SLI
Intel P35 ExpressNVIDIA nForce 750i SLI
Intel P43 ExpressNVIDIA nForce 780i
Intel P45 ExpressNVIDIA nForce 780i SLI
Intel P965 ExpressNVIDIA nForce 790i SLI
Intel Q33 ExpressNVIDIA nForce 790i SLI
Intel Q35 ExpressNVIDIA nForce 790i Ultra
Intel Q43 ExpressNVIDIA nForce 790i Ultra
Intel Q45 ExpressNVIDIA nForce 790i Ultra SLI
Intel X38 ExpressSiS 672

Intel Core 2 Quad Q9550 motherboard support

There are 877 motherboards, compatible with this processor. Complete list of these motherboards is available on the Intel Core 2 Quad Q9550 motherboards page.

Intel Core 2 Quad Q9550 specifications

The microprocessor specs below were provided by CPU-World, and they are published with their permission. Please see CPU-World website for complete specifications.

General specs

Core Name:Yorkfield
Manufacturing Process:0.045 micron
Socket Type:Socket 775
The Number of Cores:4
The Number of Threads:4
Multiprocessing:Not supported
Frequency:2.833 GHz
Bus speed:1.333 GHz
L1 Cache:128 KB (code)
128 KB (data)
L2 Cache:12 MB
Thermal Design Power:95 Watt

Instructions and Technologies

Execute Disable Bit?Yes
64-bit Support?Yes
Hyper-Threading technology?No
Enhanced SpeedStep?Yes
Instruction Set Extensions:MMX
Supplemental SSE3

Tray Core 2 Quad Q9550 microprocessors have EU80569PJ073N part number. Boxed CPUs have BX80569Q9550 part number. Boxed microprocessors for Chinese market have BXC80569Q9550 part number. Please check Intel Core 2 Quad page for details on other CPUs from the family.

Core 2 Quad Q9550 S-Spec numbers

Production versions of this Core 2 Quad CPU had the following S-spec numbers:

S-Spec numberSteppingCPU ID

CPUs, similar to Intel Core 2 Quad Q9550

The Intel Core 2 Quad Q9550 is a Socket 775 microprocessor, based on Yorkfield core. There were also 26 Yorkfield processors, that work in the same socket. Partial characteristics of these parts, together with stepping information is provided below:

Model / PartCoresThreadsFrequencyFSBL2
Xeon L3360442.833 GHz1333 MHz12MB65W  +    1%
Core 2 Quad Q8200442.333 GHz1333 MHz4MB95W    ++ 91%
Core 2 Quad Q8200S442.333 GHz1333 MHz4MB65W     + 66%
Core 2 Quad Q8300442.5 GHz1333 MHz4MB95W     + 85%
Core 2 Quad Q8400442.667 GHz1333 MHz4MB95W     + 72%
Core 2 Quad Q8400S442.667 GHz1333 MHz4MB65W     + 68%
Core 2 Quad Q9300442.5 GHz1333 MHz6MB95W   ++  96%
Core 2 Quad Q9400442.667 GHz1333 MHz6MB95W     + 88%
Core 2 Quad Q9400S442.667 GHz1333 MHz6MB65W     + 55%
Core 2 Quad Q9450442.667 GHz1333 MHz12MB95W++     92%
Core 2 Quad Q9450S442.667 GHz1333 MHz12MB65W +     0%
Core 2 Quad Q9500442.833 GHz1333 MHz6MB95W     + 45%
Core 2 Quad Q9505442.833 GHz1333 MHz6MB95W     + 66%
Core 2 Quad Q9505S442.833 GHz1333 MHz6MB65W     + 45%
Core 2 Quad Q9550442.833 GHz1333 MHz12MB95W+++    N/A
Core 2 Quad Q9550S442.833 GHz1333 MHz12MB65W  +    59%
Core 2 Quad Q9650443 GHz1333 MHz12MB95W  +    84%
Core 2 Quad Q9700443.167 GHz1333 MHz6MB95W       0%
Core 2 Quad Q9705443.167 GHz1333 MHz6MB95W       0%
Core 2 Extreme QX9650443 GHz1333 MHz12MB130W++     70%
Core 2 Extreme QX9770443.2 GHz1600 MHz12MB136W +     47%
Xeon X3320442.5 GHz1333 MHz6MB95W +   + 5%
Xeon X3330442.667 GHz1333 MHz6MB95W     + 1%
Xeon X3350442.667 GHz1333 MHz12MB95W+++    12%
Xeon X3360442.833 GHz1333 MHz12MB95W+++    11%
Xeon X3370443 GHz1333 MHz12MB95W  +    1%
Xeon X3380443.167 GHz1333 MHz12MB95W  +    1%

"Upgrade Chance" is a probability of a successful processor upgrade/downgrade from the Core 2 Quad Q9550 (original CPU) to a specific model. This number is calculated as a percentage of all motherboards, compatible with both original and upgrade CPUs, compared to the number of motherboards, that support the original Intel Q9550. The number "100%" means that all motherboards, that work with the original model, also work with the upgrade CPU. The number "0%" means that none of the boards, that support the original CPU, will support the upgrade processor. The manufacturers do not always test or publish results for obscure and unreleased models, and in some cases for OEM only processors, as a result they tend to have much lower scores than more common desktop/mobile counterparts.

Intel Core 2 Quad Q9550 performance

The table below shows average multi-threaded performance of the processor compared to other Socket 775 chips with the same type of architecture. The performance value for many CPUs was determined from more than 10 different real-world tests and synthetic benchmarks. For each benchmarked application, we calculated performance ratio between current CPU and the Core 2 Quad Q9550, and then averaged the results. Overall performance of microprocessors, marked with (1), was estimated using their specifications, and tests of similar Intel Socket 775 products with Yorkfield core.

Model / PartRelative performance Note
Core 2 Quad Q9550
Core 2 Quad Q9550S
Core 2 Quad Q9500
Core 2 Quad Q9505
Core 2 Quad Q9505S
Core 2 Quad Q9400
Core 2 Quad Q9400S
Core 2 Quad Q8400
Core 2 Quad Q8400S
Core 2 Quad Q9300
Core 2 Quad Q8300
Core 2 Quad Q8200
Core 2 Quad Q8200S