i9-10900X vs Ultra 7 255H

Primary details

Comparing Core Ultra 7 255H and Core i9-10900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	343	528
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Desktop processor
Power efficiency	14.93	8.10
Architecture codename	no data	Cascade Lake-X (2019)
Release date	1 January 2025 (less than a year ago)	19 October 2019 (5 years ago)

Detailed specifications

Core Ultra 7 255H and Core i9-10900X 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)	10 (Deca-Core)
Performance-cores	6	no data
Efficient-cores	8	no data
Low Power Efficient-cores	2	no data
Threads	16	20
Base clock speed	no data	3.7 GHz
Boost clock speed	5.1 GHz	4.7 GHz
Bus rate	no data	8 GT/s DMI3 MHz
L1 cache	no data	64K (per core)
L2 cache	no data	1 MB (per core)
L3 cache	24 MB	19.25 MB (shared)
Chip lithography	no data	14 nm
Maximum core temperature	no data	94 °C
64 bit support	+	+
Windows 11 compatibility	no data	+
Unlocked multiplier	-	+

Compatibility

Information on Core Ultra 7 255H and Core i9-10900X 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	FCBGA2049	FCLGA2066
Power consumption (TDP)	115 Watt	165 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core Ultra 7 255H and Core i9-10900X. 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, Intel® AVX-512
AES-NI	+	+
AVX	-	+
Enhanced SpeedStep (EIST)	no data	+
Speed Shift	+	no data
Turbo Boost Technology	no data	2.0
Hyper-Threading Technology	-	+
TSX	-	+
Thermal Monitoring	+	-
Turbo Boost Max 3.0	+	+
Deep Learning Boost	+	+
Supported AI Software Frameworks	OpenVINO™, WindowsML, DirectML, ONNX RT, WebNN	-

Security technologies

Core Ultra 7 255H and Core i9-10900X technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	+	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core Ultra 7 255H and Core i9-10900X are enumerated here.

VT-d	+	+
VT-x	+	+
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core Ultra 7 255H and Core i9-10900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR5-6400	DDR4-2933
Maximum memory size	128 GB	256 GB
Max memory channels	2	4
Maximum memory bandwidth	no data	94 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® Arc™ 140T GPU	no data
Quick Sync Video	+	-
Graphics max frequency	2.25 GHz	no data

Graphics interfaces

Available interfaces and connections of Core Ultra 7 255H and Core i9-10900X integrated GPUs.

Number of displays supported

4

no data

Graphics image quality

Maximum display resolutions supported by Core Ultra 7 255H and Core i9-10900X integrated GPUs, including resolutions over different interfaces.

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

Graphics API support

APIs supported by Core Ultra 7 255H and Core i9-10900X integrated GPUs, sometimes API versions are included.

DirectX	12.2	no data
OpenGL	4.6	no data

Peripherals

Specifications and connection of peripherals supported by Core Ultra 7 255H and Core i9-10900X.

PCIe version	no data	3.0
PCI Express lanes	28	48
PCI support	5.0 and 4.0	no data

Synthetic benchmark performance

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. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	18.02	14.03
Recency	1 January 2025	19 October 2019
Physical cores	16	10
Threads	16	20
Power consumption (TDP)	115 Watt	165 Watt

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Should you still have questions on choice between Core Ultra 7 255H and Core i9-10900X, ask them in Comments section, and we shall answer.

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