Core i5-8400B vs Core i7-740QM

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Primary details

Comparing Core i7-740QM and Core i5-8400B processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking2266not rated
Place by popularitynot in top-100not in top-100
Market segmentLaptopLaptop
SeriesIntel Core i7Intel Core i5
Architecture codenameClarksfield (2009−2010)Coffee Lake (2017−2019)
Release date20 June 2010 (13 years ago)2 April 2018 (6 years ago)
Launch price (MSRP)$546$182
Current price$595 (1.1x MSRP)$54 (0.3x MSRP)

Detailed specifications

Core i7-740QM and Core i5-8400B 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)6 (Hexa-Core)
Threads86
Base clock speed1.73 GHz2.8 GHz
Boost clock speed2.93 GHz4 GHz
Bus support2500 MHz4 × 8 GT/s
L1 cache64 KB (per core)384 KB
L2 cache256 KB (per core)1.5 MB
L3 cache6 MB (shared)9 MB
Chip lithography45 nm14 nm
Die size296 mm2126 mm2
Maximum core temperature100 °C100 °C
Number of transistors774 millionno data
64 bit support++
Windows 11 compatibility-+
Unlocked multiplierNoNo

Compatibility

Information on Core i7-740QM and Core i5-8400B 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
SocketFCPGA988,PGA988FCBGA1440
Power consumption (TDP)45 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-740QM and Core i5-8400B. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI-+
AVXno data+
vPro+no data
Enhanced SpeedStep (EIST)++
Turbo Boost Technology+2.0
Hyper-Threading Technology+-
TSXno data-
Idle States++
Thermal Monitoring++
SIPPno data-
PAE36 Bitno data
StatusDiscontinuedDiscontinued

Security technologies

Core i7-740QM and Core i5-8400B technologies aimed at improving security, for example, by protecting against hacks.

TXT+-
EDB++
Secure Keyno data+
MPXno data+
Identity Protectionno data+
SGXno dataYes with Intel® ME
OS Guardno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-740QM and Core i5-8400B are enumerated here.

VT-d++
VT-x++
EPT++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-740QM and Core i5-8400B. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3-1066, DDR3-1333DDR4-2666
Maximum memory size8 GB64 GB
Max memory channels22
Maximum memory bandwidth21 GB/s42.671 GB/s
ECC memory support--

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardNoneIntel UHD Graphics 630
Max video memoryno data64 GB
Quick Sync Videono data+
Clear Videono data+
Clear Video HDno data+
Graphics max frequencyno data1.05 GHz
InTru 3Dno data+

Graphics interfaces

Available interfaces and connections of Core i7-740QM and Core i5-8400B integrated GPUs.

Number of displays supportedno data3

Graphics image quality

Maximum display resolutions supported by Core i7-740QM and Core i5-8400B integrated GPUs, including resolutions over different interfaces.

4K resolution supportno data+
Max resolution over HDMI 1.4no data4096x2304@30Hz
Max resolution over eDPno data4096x2304@60Hz
Max resolution over DisplayPortno data4096x2304@60Hz

Graphics API support

APIs supported by Core i7-740QM and Core i5-8400B integrated GPUs, sometimes API versions are included.

DirectXno data12
OpenGLno data4.5

Peripherals

Specifications and connection of peripherals supported by Core i7-740QM and Core i5-8400B.

PCIe version23.0
PCI Express lanes1616

Pros & cons summary


Recency 20 June 2010 2 April 2018
Physical cores 4 6
Threads 8 6
Cost $546 $182
Chip lithography 45 nm 14 nm
Power consumption (TDP) 45 Watt 65 Watt

We couldn't decide between Core i7-740QM and Core i5-8400B. We've got no test results to judge.


Should you still have questions on choice between Core i7-740QM and Core i5-8400B, ask them in Comments section, and we shall answer.

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Intel Core i7-740QM
Core i7-740QM
Intel Core i5-8400B
Core i5-8400B

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Community ratings

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Questions & comments

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