Core 2 Quad Q9505S vs Core 2 Quad Q9550

Primary details

Comparing Core 2 Quad (Desktop) Q9550 and Core 2 Quad Q9505S processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking2155not rated
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorDesktop processor
SeriesCore 2 Quad (Desktop)no data
Power efficiency1.47no data
Architecture codenameYorkfield (2007−2009)no data
Release dateno data (2024 years ago)1 July 2009 (15 years ago)

Detailed specifications

Core 2 Quad (Desktop) Q9550 and Core 2 Quad Q9505S 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)
Threads4no data
Base clock speedno data2.83 GHz
Boost clock speed2.83 GHzno data
Bus rate1333 MHz1333 MHz
L2 cache12288 KBno data
L3 cacheno data6 MB L2 Cache
Chip lithography45 nm45 nm
Maximum core temperatureno data76 °C
64 bit support++
Windows 11 compatibility--
VID voltage rangeno data0.85V-1.3625V

Compatibility

Information on Core 2 Quad (Desktop) Q9550 and Core 2 Quad Q9505S 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.

SocketLGA775LGA775
Power consumption (TDP)95 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad (Desktop) Q9550 and Core 2 Quad Q9505S. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)no data+
Turbo Boost Technologyno data-
Hyper-Threading Technologyno data-
Idle Statesno data+
Thermal Monitoring-+
Demand Based Switchingno data-

Security technologies

Core 2 Quad (Desktop) Q9550 and Core 2 Quad Q9505S technologies aimed at improving security, for example, by protecting against hacks.

TXTno data+
EDBno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad (Desktop) Q9550 and Core 2 Quad Q9505S are enumerated here.

VT-dno data+
VT-xno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad (Desktop) Q9550 and Core 2 Quad Q9505S. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR1,DDR2,DDR3no data

Pros & cons summary


Power consumption (TDP) 95 Watt 65 Watt

Core 2 Quad Q9505S has 46.2% lower power consumption.

We couldn't decide between Core 2 Quad Q9550 and Core 2 Quad Q9505S. We've got no test results to judge.


Should you still have questions on choice between Core 2 Quad Q9550 and Core 2 Quad Q9505S, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


Intel Core 2 Quad Q9550
Core 2 Quad Q9550
Intel Core 2 Quad Q9505S
Core 2 Quad Q9505S

Similar processor comparisons

We picked several similar comparisons of processors in the same market segment and performance relatively close to those reviewed on this page.

Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


4.1 1863 votes

Rate Core 2 Quad Q9550 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
4 8 votes

Rate Core 2 Quad Q9505S on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Core 2 Quad Q9550 or Core 2 Quad Q9505S, agree or disagree with our judgements, or report an error or mismatch.