i5-8400H vs Ultra 9 285H

Primary details

Comparing processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	348	1498
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	27.28	1.90
Market segment	Laptop	Laptop
Series	no data	Intel Core i5
Power efficiency	18.27	3.99
Designer	Intel	Intel
Manufacturer	TSMC	Intel
Architecture codename	Arrow Lake-H (2025)	Coffee Lake-H (2018−2019)
Release date	13 January 2025 (less than a year ago)	2 April 2018 (7 years ago)
Launch price (MSRP)	$651	$250

Cost-effectiveness evaluation

Performance per price, higher is better.

Ultra 9 285H has 1336% better value for money than i5-8400H.

Performance to price scatter graph

Detailed specifications

Core Ultra 9 285H and Core i5-8400H 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	16 (Hexadeca-Core)	4 (Quad-Core)
Performance-cores	6	no data
Efficient-cores	8	no data
Low Power Efficient-cores	2	no data
Threads	16	8
Base clock speed	2.9 GHz	2.5 GHz
Boost clock speed	5.4 GHz	4.2 GHz
Bus type	no data	DMI 3.0
Bus rate	no data	4 × 8 GT/s
Multiplier	no data	25
L1 cache	192 KB (per core)	64K (per core)
L2 cache	3 MB (per core)	256K (per core)
L3 cache	24 MB (shared)	12 MB (shared)
Chip lithography	3 nm	14 nm
Die size	no data	126 mm2
Maximum core temperature	110 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
64 bit support	+	+
Windows 11 compatibility	no data	+

Compatibility

Information on Core Ultra 9 285H and Core i5-8400H 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 (Uniprocessor)
Socket	FCBGA2049	FCBGA1440
Power consumption (TDP)	45 Watt	45 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core Ultra 9 285H and Core i5-8400H. 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	+	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	+	+
My WiFi	no data	+
Turbo Boost Technology	no data	2.0
Hyper-Threading Technology	-	+
TSX	-	+
Idle States	no data	+
Thermal Monitoring	+	+
Flex Memory Access	no data	+
SIPP	+	+
Turbo Boost Max 3.0	+	no data
Deep Learning Boost	+	-
Supported AI Software Frameworks	OpenVINO™, WindowsML, ONNX RT, DirectML, WebNN	-

Security technologies

Core Ultra 9 285H and Core i5-8400H technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core Ultra 9 285H and Core i5-8400H are enumerated here.

AMD-V	-	+
VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core Ultra 9 285H and Core i5-8400H. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR5-6400	DDR4
Maximum memory size	128 GB	64 GB
Max memory channels	2	2
Maximum memory bandwidth	no data	42.671 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® Arc™ 140T GPU	Intel UHD Graphics 630
Max video memory	no data	64 GB
Quick Sync Video	+	+
Clear Video	no data	+
Clear Video HD	no data	+
Graphics max frequency	2.35 GHz	1.1 GHz
InTru 3D	no data	+

Graphics interfaces

Available interfaces and connections of Core Ultra 9 285H and Core i5-8400H integrated GPUs.

Number of displays supported	4	3
eDP	no data	+
DisplayPort	-	+
HDMI	-	+
DVI	no data	+

Graphics image quality

Maximum display resolutions supported by Core Ultra 9 285H and Core i5-8400H integrated GPUs, including resolutions over different interfaces.

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

Graphics API support

APIs supported by Core Ultra 9 285H and Core i5-8400H integrated GPUs, sometimes API versions are included.

DirectX	12.2	12
OpenGL	4.6	4.5

Peripherals

Specifications and connection of peripherals supported by Core Ultra 9 285H and Core i5-8400H.

PCIe version	5.0	3.0
PCI Express lanes	24	16
PCI support	5.0 and 4.0	no data

Synthetic benchmarks

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating.

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Pros & cons summary

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Performance score	19.32	4.22
Recency	13 January 2025	2 April 2018
Physical cores	16	4
Threads	16	8
Chip lithography	3 nm	14 nm

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