Ultra 7 155H vs i9-7940X

Primary details

Comparing Core i9-7940X and Core Ultra 7 155H processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	402	424
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.21	no data
Market segment	Desktop processor	Laptop
Series	Intel Core i9	Intel Meteor Lake-H
Power efficiency	9.37	53.44
Architecture codename	Skylake (server) (2017−2018)	Meteor Lake-H (2023)
Release date	1 September 2017 (7 years ago)	14 December 2023 (less than a year ago)
Launch price (MSRP)	$1,399	$503

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i9-7940X and Core Ultra 7 155H 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	14 (Tetradeca-Core)	16 (Hexadeca-Core)
Threads	28	22
Base clock speed	3.1 GHz	3.8 GHz
Boost clock speed	4.4 GHz	4.8 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
L1 cache	64 KB (per core)	112 KB (per core)
L2 cache	1 MB (per core)	2 MB (per core)
L3 cache	19.25 MB (shared)	24 MB (shared)
Chip lithography	14 nm	Intel 4 nm
Die size	484 mm2	no data
Maximum core temperature	102 °C	110 °C
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	+	-

Compatibility

Information on Core i9-7940X and Core Ultra 7 155H 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	FCLGA2066	FCBGA2049
Power consumption (TDP)	165 Watt	28 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i9-7940X and Core Ultra 7 155H. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512	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	+	+
Thermal Monitoring	-	+
Flex Memory Access	no data	+
Turbo Boost Max 3.0	+	+
Deep Learning Boost	-	+
Supported AI Software Frameworks	-	OpenVINO™, WindowsML, ONNX RT

Security technologies

Core i9-7940X and Core Ultra 7 155H technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i9-7940X and Core Ultra 7 155H are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i9-7940X and Core Ultra 7 155H. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-2666	DDR5
Maximum memory size	128 GB	96 GB
Max memory channels	4	2
Maximum memory bandwidth	85.33 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	N/A	Intel® Arc™ graphics
Quick Sync Video	-	+
Graphics max frequency	no data	2.25 GHz

Graphics interfaces

Available interfaces and connections of Core i9-7940X and Core Ultra 7 155H integrated GPUs.

Number of displays supported

no data

4

Graphics image quality

Maximum display resolutions supported by Core i9-7940X and Core Ultra 7 155H integrated GPUs, including resolutions over different interfaces.

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

Graphics API support

APIs supported by Core i9-7940X and Core Ultra 7 155H integrated GPUs, sometimes API versions are included.

DirectX	no data	12.2
OpenGL	no data	4.6

Peripherals

Specifications and connection of peripherals supported by Core i9-7940X and Core Ultra 7 155H.

PCIe version	3.0	5.0
PCI Express lanes	44	8
PCI support	no data	5.0 and 4.0

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	16.34	15.81
Recency	1 September 2017	14 December 2023
Physical cores	14	16
Threads	28	22
Power consumption (TDP)	165 Watt	28 Watt

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Should you still have questions on choice between Core i9-7940X and Core Ultra 7 155H, ask them in Comments section, and we shall answer.

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