Ultra 5 125U vs i5-8400B

Primary details

Comparing Core i5-8400B and Core Ultra 5 125U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	not rated	705
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core i5	Intel Meteor Lake-U
Power efficiency	no data	69.34
Architecture codename	Coffee Lake (2017−2019)	Meteor Lake-P (2023)
Release date	2 April 2018 (6 years ago)	14 December 2023 (less than a year ago)
Launch price (MSRP)	$182	$363

Detailed specifications

Core i5-8400B and Core Ultra 5 125U 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)	12 (Dodeca-Core)
Threads	6	14
Base clock speed	2.8 GHz	1.3 GHz
Boost clock speed	4 GHz	4.3 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	28	no data
L1 cache	384 KB	112 KB (per core)
L2 cache	1.5 MB	2 MB (per core)
L3 cache	9 MB	12 MB (shared)
Chip lithography	14 nm	Intel 4 nm
Die size	126 mm2	no data
Maximum core temperature	100 °C	110 °C
64 bit support	+	+
Windows 11 compatibility	+	no data

Compatibility

Information on Core i5-8400B and Core Ultra 5 125U 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 (Uniprocessor)	1
Socket	FCBGA1440	FCBGA2049
Power consumption (TDP)	65 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8400B and Core Ultra 5 125U. 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	+	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	-	+
TSX	-	+
Idle States	+	no data
Thermal Monitoring	+	+
Flex Memory Access	no data	+
Turbo Boost Max 3.0	no data	-
Deep Learning Boost	-	+
Supported AI Software Frameworks	-	OpenVINO™, WindowsML, ONNX RT

Security technologies

Core i5-8400B and Core Ultra 5 125U technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-8400B and Core Ultra 5 125U 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 Ultra 5 125U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR5
Maximum memory size	64 GB	96 GB
Max memory channels	2	2
Maximum memory bandwidth	42.671 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel UHD Graphics 630	Intel® Graphics
Max video memory	64 GB	no data
Quick Sync Video	+	+
Clear Video	+	no data
Clear Video HD	+	no data
Graphics max frequency	1.05 GHz	1.85 GHz
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i5-8400B and Core Ultra 5 125U integrated GPUs.

Number of displays supported

3

4

Graphics image quality

Maximum display resolutions supported by Core i5-8400B and Core Ultra 5 125U integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096x2304@30Hz	4096 x 2304 @ 60Hz (HDMI 2.1 TMDS) 7680 x 4320 @ 60Hz (HDMI2.1 FRL)
Max resolution over eDP	4096x2304@60Hz	3840x2400 @ 120Hz
Max resolution over DisplayPort	4096x2304@60Hz	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i5-8400B and Core Ultra 5 125U integrated GPUs, sometimes API versions are included.

DirectX	12	12.2
OpenGL	4.5	4.6

Peripherals

Specifications and connection of peripherals supported by Core i5-8400B and Core Ultra 5 125U.

PCIe version	3.0	4.0
PCI Express lanes	16	12
PCI support	no data	4.0

Pros & cons summary

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Recency	2 April 2018	14 December 2023
Physical cores	6	12
Threads	6	14
Power consumption (TDP)	65 Watt	15 Watt

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Should you still have questions on choice between Core i5-8400B and Core Ultra 5 125U, ask them in Comments section, and we shall answer.

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