Core i5-8400B vs Core i7-740QM

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 ranking	2266	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core i7	Intel Core i5
Architecture codename	Clarksfield (2009−2010)	Coffee Lake (2017−2019)
Release date	22 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 cores	4 (Quad-Core)	6 (Hexa-Core)
Threads	8	6
Base clock speed	1.73 GHz	2.8 GHz
Boost clock speed	2.93 GHz	4 GHz
Bus support	2.5 GT/s	4 × 8 GT/s
L1 cache	256 KB	384 KB
L2 cache	1 MB	1.5 MB
L3 cache	6 MB (shared)	9 MB
Chip lithography	45 nm	14 nm
Die size	296 mm2	126 mm2
Maximum core temperature	100 °C	100 °C
Number of transistors	774 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	No	No

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 configuration	1	1
Socket	FCPGA988,PGA988	FCBGA1440
Power consumption (TDP)	45 Watt	65 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 extensions	Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	-	+
AVX	no data	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	+	2.0
Hyper-Threading Technology	+	-
TSX	no data	-
Idle States	+	+
Thermal Monitoring	+	+
SIPP	no data	-
PAE	36 Bit	no data
Status	Discontinued	Discontinued

Security technologies

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

TXT	+	-
EDB	+	+
Secure Key	no data	+
MPX	no data	+
Identity Protection	no data	+
SGX	no data	Yes with Intel® ME
OS Guard	no 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 types	DDR3-1066, DDR3-1333	DDR4-2666
Maximum memory size	8 GB	64 GB
Max memory channels	2	2
Maximum memory bandwidth	21 GB/s	42.671 GB/s
ECC memory support	-	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	None	Intel UHD Graphics 630
Max video memory	no data	64 GB
Quick Sync Video	no data	+
Clear Video	no data	+
Clear Video HD	no data	+
Graphics max frequency	no data	1.05 GHz
InTru 3D	no data	+

Graphics interfaces

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

Number of displays supported

no data

3

Graphics image quality

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

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096x2304@30Hz
Max resolution over eDP	no data	4096x2304@60Hz
Max resolution over DisplayPort	no data	4096x2304@60Hz

Graphics API support

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

DirectX	no data	12
OpenGL	no data	4.5

Peripherals

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

PCIe version	2	3.0
PCI Express lanes	16	16

Pros & cons summary

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Recency	22 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

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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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