Ryzen 7 7840S vs Ultra 7 255H

Primary details

Comparing Core Ultra 7 255H and Ryzen 7 7840S processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	343	479
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	no data	Phoenix (Zen 4, Ryzen 7040)
Power efficiency	14.93	40.73
Architecture codename	no data	Phoenix-HS (Zen 4) (2023)
Release date	1 January 2025 (less than a year ago)	5 January 2023 (2 years ago)

Detailed specifications

Core Ultra 7 255H and Ryzen 7 7840S 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)
Performance-cores	6	no data
Efficient-cores	8	no data
Low Power Efficient-cores	2	no data
Threads	16	16
Base clock speed	no data	3.8 GHz
Boost clock speed	5.1 GHz	5.1 GHz
L1 cache	no data	512 KB
L2 cache	no data	8 MB
L3 cache	24 MB	16 MB
Chip lithography	no data	4 nm
Die size	no data	178 mm2
Maximum core temperature	no data	100 °C
64 bit support	+	+
Windows 11 compatibility	no data	+

Compatibility

Information on Core Ultra 7 255H and Ryzen 7 7840S 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	no data
Socket	FCBGA2049	FP7/FP7r2/FP8
Power consumption (TDP)	115 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core Ultra 7 255H and Ryzen 7 7840S. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Ryzen AI, MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME
AES-NI	+	+
FMA	-	+
AVX	-	+
Speed Shift	+	no data
Hyper-Threading Technology	-	no data
Thermal Monitoring	+	-
Turbo Boost Max 3.0	+	no data
Deep Learning Boost	+	-
Supported AI Software Frameworks	OpenVINO™, WindowsML, DirectML, ONNX RT, WebNN	-

Security technologies

Core Ultra 7 255H and Ryzen 7 7840S 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 255H and Ryzen 7 7840S are enumerated here.

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 255H and Ryzen 7 7840S. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR5-6400	DDR5
Maximum memory size	128 GB	no data
Max memory channels	2	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® Arc™ 140T GPU	AMD Radeon 780M ( - 2700 MHz)
Quick Sync Video	+	-
Graphics max frequency	2.25 GHz	no data

Graphics interfaces

Available interfaces and connections of Core Ultra 7 255H and Ryzen 7 7840S integrated GPUs.

Number of displays supported

4

no data

Graphics image quality

Maximum display resolutions supported by Core Ultra 7 255H and Ryzen 7 7840S 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 Ryzen 7 7840S 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 Ryzen 7 7840S.

PCI Express lanes	28	no data
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	14.96
Recency	1 January 2025	5 January 2023
Physical cores	16	8
Power consumption (TDP)	115 Watt	35 Watt

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Should you still have questions on choice between Core Ultra 7 255H and Ryzen 7 7840S, ask them in Comments section, and we shall answer.

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