EPYC 7251 vs Ultra 7 155H

Primary details

Comparing Core Ultra 7 155H and EPYC 7251 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	424	803
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	3.04
Market segment	Laptop	Server
Series	Intel Meteor Lake-H	AMD EPYC
Power efficiency	53.12	7.42
Architecture codename	Meteor Lake-H (2023)	Naples (2017−2018)
Release date	14 December 2023 (less than a year ago)	29 June 2017 (7 years ago)
Launch price (MSRP)	$503	$574

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core Ultra 7 155H and EPYC 7251 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)	8 (Octa-Core)
Threads	22	16
Base clock speed	3.8 GHz	2.1 GHz
Boost clock speed	4.8 GHz	2.9 GHz
Multiplier	no data	21
L1 cache	112 KB (per core)	96K (per core)
L2 cache	2 MB (per core)	512K (per core)
L3 cache	24 MB (shared)	32 MB (shared)
Chip lithography	Intel 4 nm	14 nm
Die size	no data	192 mm2
Maximum core temperature	110 °C	no data
Number of transistors	no data	4,800 million
64 bit support	+	+
Windows 11 compatibility	no data	-
Unlocked multiplier	-	+

Compatibility

Information on Core Ultra 7 155H and EPYC 7251 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	2 (Multiprocessor)
Socket	FCBGA2049	TR4
Power consumption (TDP)	28 Watt	120 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core Ultra 7 155H and EPYC 7251. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	no data
AES-NI	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	no data
Speed Shift	+	no data
Hyper-Threading Technology	+	no data
TSX	+	-
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 Ultra 7 155H and EPYC 7251 technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core Ultra 7 155H and EPYC 7251 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core Ultra 7 155H and EPYC 7251. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR5	DDR4 Eight-channel
Maximum memory size	96 GB	2 TiB
Max memory channels	2	8
Maximum memory bandwidth	no data	153.652 GB/s
ECC memory support	-	+

Graphics specifications

General parameters of integrated GPUs, if any.

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

Graphics interfaces

Available interfaces and connections of Core Ultra 7 155H and EPYC 7251 integrated GPUs.

Number of displays supported

4

no data

Graphics image quality

Maximum display resolutions supported by Core Ultra 7 155H and EPYC 7251 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 155H and EPYC 7251 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 155H and EPYC 7251.

PCIe version	5.0	3.0
PCI Express lanes	8	128
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	16.31	9.76
Recency	14 December 2023	29 June 2017
Physical cores	16	8
Threads	22	16
Power consumption (TDP)	28 Watt	120 Watt

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Should you still have questions on choice between Core Ultra 7 155H and EPYC 7251, ask them in Comments section, and we shall answer.

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