Core i7-740QM vs Core 2 Quad Q9400

VS

Aggregate performance score

Core 2 Quad Q9400
2008
4 cores / 4 threads, 95 Watt
1.35
+17.4%
Core i7-740QM
2010
4 cores / 8 threads, 45 Watt
1.15

Core 2 Quad Q9400 outperforms Core i7-740QM by a moderate 17% based on our aggregate benchmark results.

Primary details

Comparing Core 2 Quad Q9400 and Core i7-740QM processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking22562385
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorLaptop
Seriesno dataIntel Core i7
Power efficiency1.342.42
Architecture codenameYorkfield (2007−2009)Clarksfield (2009−2010)
Release dateAugust 2008 (16 years ago)20 June 2010 (14 years ago)
Launch price (MSRP)no data$546

Detailed specifications

Core 2 Quad Q9400 and Core i7-740QM 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)
Threads48
Base clock speed2.66 GHz1.73 GHz
Boost clock speed2.67 GHz2.93 GHz
Bus typeno dataDMI 1.0
Bus rate1333 MHz2.5 GT/s
Multiplierno data13
L1 cache64K (per core)64 KB (per core)
L2 cache6 MB (shared)256 KB (per core)
L3 cache0 KB6 MB (shared)
Chip lithography45 nm45 nm
Die size2x 81 mm2296 mm2
Maximum core temperatureno data100 °C
Maximum case temperature (TCase)71 °Cno data
Number of transistors456 million774 million
64 bit support++
Windows 11 compatibility--
VID voltage range0.85V-1.3625Vno data

Compatibility

Information on Core 2 Quad Q9400 and Core i7-740QM 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 (Uniprocessor)
SocketLGA775FCPGA988,PGA988
Power consumption (TDP)95 Watt45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q9400 and Core i7-740QM. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataIntel® SSE4.2
vProno data+
Enhanced SpeedStep (EIST)++
Turbo Boost Technology-+
Hyper-Threading Technology-+
Idle States++
Thermal Monitoring++
Demand Based Switching-no data
PAEno data36 Bit
FSB parity-no data

Security technologies

Core 2 Quad Q9400 and Core i7-740QM technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q9400 and Core i7-740QM are enumerated here.

VT-d++
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9400 and Core i7-740QM. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR1, DDR2, DDR3DDR3-1066, DDR3-1333
Maximum memory sizeno data8 GB
Max memory channelsno data2
Maximum memory bandwidthno data21.335 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataNone

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q9400 and Core i7-740QM.

PCIe versionno data2
PCI Express lanesno data16

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 1.35
+17.4%
i7-740QM 1.15

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 2138
+16.8%
i7-740QM 1831

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 334
i7-740QM 348
+4.2%

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 925
i7-740QM 971
+5%

Gaming performance

Pros & cons summary


Performance score 1.35 1.15
Threads 4 8
Power consumption (TDP) 95 Watt 45 Watt

Core 2 Quad Q9400 has a 17.4% higher aggregate performance score.

i7-740QM, on the other hand, has 100% more threads, and 111.1% lower power consumption.

The Core 2 Quad Q9400 is our recommended choice as it beats the Core i7-740QM in performance tests.

Note that Core 2 Quad Q9400 is a desktop processor while Core i7-740QM is a notebook one.


Should you still have questions on choice between Core 2 Quad Q9400 and Core i7-740QM, 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 Core i7-740QM
Core i7-740QM

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.


4.3 1573 votes

Rate Core 2 Quad Q9400 on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
4.2 158 votes

Rate Core i7-740QM on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about Core 2 Quad Q9400 or Core i7-740QM, agree or disagree with our judgements, or report an error or mismatch.