Celeron 2955U vs Core 2 Quad Q9400

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Aggregate performance score

Core 2 Quad Q9400
2008
4 cores / 4 threads, 95 Watt
1.39
+144%

Core 2 Quad Q9400 outperforms Celeron 2955U by a whopping 144% based on our aggregate benchmark results.

Contents

Core 2 Quad Q9400 Core 2 Quad Q9400
Celeron 2955U Celeron 2955U

Primary details

Comparing Core 2 Quad Q9400 and Celeron 2955U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking22382825
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorLaptop
Seriesno dataIntel Celeron
Power efficiency1.333.47
Architecture codenameYorkfield (2007−2009)Haswell (2013−2015)
Release dateAugust 2008 (16 years ago)1 September 2013 (11 years ago)

Detailed specifications

Core 2 Quad Q9400 and Celeron 2955U 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)2 (Dual-core)
Threads42
Base clock speed2.66 GHz1.4 GHz
Boost clock speed2.67 GHz1.4 GHz
Bus rate1333 MHz5 GT/s
L1 cache64K (per core)64K (per core)
L2 cache6 MB (shared)256K (per core)
L3 cache0 KB2 MB (shared)
Chip lithography45 nm22 nm
Die size2x 81 mm2118 mm2
Maximum core temperatureno data100 °C
Maximum case temperature (TCase)71 °C105 °C
Number of transistors456 million1,400 million
64 bit support++
Windows 11 compatibility--
VID voltage range0.85V-1.3625Vno data

Compatibility

Information on Core 2 Quad Q9400 and Celeron 2955U 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
SocketLGA775FCBGA1168
Power consumption (TDP)95 Watt15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q9400 and Celeron 2955U. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataIntel® SSE4.1, Intel® SSE4.2
Enhanced SpeedStep (EIST)++
Turbo Boost Technology--
Hyper-Threading Technology--
Idle States++
Thermal Monitoring++
Smart Responseno data-
Demand Based Switching-no data
GPIOno data+
Smart Connectno data+
FDIno data-
AMTno data9.5
Matrix Storageno data-
FSB parity-no data
HD Audiono data+
RSTno data+

Security technologies

Core 2 Quad Q9400 and Celeron 2955U technologies aimed at improving security, for example, by protecting against hacks.

TXT+-
EDB++
Secure Keyno data+
OS Guardno data-
Anti-Theftno data-

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q9400 and Celeron 2955U are enumerated here.

AMD-V-+
VT-d+-
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9400 and Celeron 2955U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR1, DDR2, DDR3DDR3
Maximum memory sizeno data16 GB
Max memory channelsno data2
Maximum memory bandwidthno data25.6 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataIntel® HD Graphics for 4th Generation Intel® Processors
Clear Videono data+
Graphics max frequencyno data1 GHz

Graphics interfaces

Available interfaces and connections of Core 2 Quad Q9400 and Celeron 2955U integrated GPUs.

Number of displays supportedno data3
eDPno data+
DisplayPort-+
HDMI-+

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q9400 and Celeron 2955U.

PCIe versionno data2.0
PCI Express lanesno data10
PCI supportno data-
USB revisionno data3.0
Total number of SATA portsno data2
Max number of SATA 6 Gb/s Portsno data2
Integrated IDEno data-
Number of USB portsno data4
Integrated LANno data-
UARTno data+

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Core 2 Quad Q9400 1.39
+144%
Celeron 2955U 0.57

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Core 2 Quad Q9400 2132
+143%
Celeron 2955U 877

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Core 2 Quad Q9400 335
+25.9%
Celeron 2955U 266

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Core 2 Quad Q9400 923
+103%
Celeron 2955U 455

Gaming performance

Pros & cons summary

Performance score 1.39 0.57
Physical cores 4 2
Threads 4 2
Chip lithography 45 nm 22 nm
Power consumption (TDP) 95 Watt 15 Watt

Core 2 Quad Q9400 has a 143.9% higher aggregate performance score, and 100% more physical cores and 100% more threads.

Celeron 2955U, on the other hand, has a 104.5% more advanced lithography process, and 533.3% lower power consumption.

The Core 2 Quad Q9400 is our recommended choice as it beats the Celeron 2955U in performance tests.

Note that Core 2 Quad Q9400 is a desktop processor while Celeron 2955U is a notebook one.

Should you still have questions on choice between Core 2 Quad Q9400 and Celeron 2955U, 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 Q9400
Core 2 Quad Q9400
Intel Celeron 2955U
Celeron 2955U
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Community ratings

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

4.3 1546 votes

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2.6 65 votes

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Questions & comments

Here you can ask a question about Core 2 Quad Q9400 or Celeron 2955U, agree or disagree with our judgements, or report an error or mismatch.