Core i7-14700K vs Core i5-8400B

Primary details

Comparing Core i5-8400B and Core i7-14700K processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	not rated	95
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	64.11
Market segment	Laptop	Desktop processor
Series	Intel Core i5	no data
Architecture codename	Coffee Lake (2017−2019)	Raptor Lake-R
Release date	2 April 2018 (6 years ago)	17 October 2023 (less than a year ago)
Launch price (MSRP)	$182	$319
Current price	$54 (0.3x MSRP)	$577 (1.8x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i5-8400B and Core i7-14700K 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	6 (Hexa-Core)	20 (Icosa-Core)
Threads	6	28
Base clock speed	2.8 GHz	3.4 GHz
Boost clock speed	4 GHz	5.6 GHz
Bus support	4 × 8 GT/s	no data
L1 cache	384 KB	80 KB (per core)
L2 cache	1.5 MB	2 MB (per core)
L3 cache	9 MB	33 MB (shared)
Chip lithography	14 nm	Intel 7 nm
Die size	126 mm2	257 mm2
Maximum core temperature	100 °C	100 °C
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	No	Yes

Compatibility

Information on Core i5-8400B and Core i7-14700K 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	FCBGA1440	FCLGA1700
Power consumption (TDP)	65 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8400B and Core i7-14700K. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	-	+
TSX	-	+
Idle States	+	+
Thermal Monitoring	+	+
SIPP	-	+
Turbo Boost Max 3.0	no data	+
Status	Discontinued	Launched

Security technologies

Core i5-8400B and Core i7-14700K technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+
Secure Key	+	+
MPX	+	no data
Identity Protection	+	no data
SGX	Yes with Intel® ME	no data
OS Guard	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-8400B and Core i7-14700K are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-8400B and Core i7-14700K. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR4, DDR5
Maximum memory size	64 GB	192 GB
Max memory channels	2	2
Maximum memory bandwidth	42.671 GB/s	89.6 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel UHD Graphics 630	Intel UHD Graphics 770
Max video memory	64 GB	no data
Quick Sync Video	+	+
Clear Video	+	no data
Clear Video HD	+	+
Graphics max frequency	1.05 GHz	1.6 GHz
Execution Units	no data	32
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i5-8400B and Core i7-14700K integrated GPUs.

Number of displays supported

3

4

Graphics image quality

Maximum display resolutions supported by Core i5-8400B and Core i7-14700K integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096x2304@30Hz	4096 x 2160 @ 60Hz
Max resolution over eDP	4096x2304@60Hz	5120 x 3200 @ 120Hz
Max resolution over DisplayPort	4096x2304@60Hz	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i5-8400B and Core i7-14700K integrated GPUs, sometimes API versions are included.

DirectX	12	12
OpenGL	4.5	4.5

Peripherals

Specifications and connection of peripherals supported by Core i5-8400B and Core i7-14700K.

PCIe version	3.0	5.0 and 4.0
PCI Express lanes	16	20

Pros & cons summary

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Integrated graphics card	3.09	6.14
Recency	2 April 2018	17 October 2023
Physical cores	6	20
Threads	6	28
Cost	$182	$319
Power consumption (TDP)	65 Watt	125 Watt

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Should you still have questions on choice between Core i5-8400B and Core i7-14700K, ask them in Comments section, and we shall answer.

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