Ryzen 7 7840U vs Ryzen 9 5900

Primary details

Comparing Ryzen 9 5900 and Ryzen 7 7840U processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	206	371
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	54.78	no data
Market segment	Desktop processor	Laptop
Series	AMD Ryzen 9	AMD Phoenix (Zen 4, Ryzen 7040)
Architecture codename	Vermeer (2020−2022)	Phoenix-U (Zen 4)
Release date	12 January 2021 (3 years ago)	May 2023 (1 year ago)
Current price	$351	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen 9 5900 and Ryzen 7 7840U 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	12 (Dodeca-Core)	8 (Octa-Core)
Threads	24	16
Base clock speed	3 GHz	3.3 GHz
Boost clock speed	4.7 GHz	5.1 GHz
L1 cache	64K (per core)	64K (per core)
L2 cache	512K (per core)	1 MB (per core)
L3 cache	64 MB	16 MB (shared)
Chip lithography	7 nm, 12 nm	4 nm
Die size	81 mm2	178 mm2
Maximum core temperature	no data	100 °C
Maximum case temperature (TCase)	95 °C	no data
Number of transistors	4,150 million	25,000 million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	Yes	No

Compatibility

Information on Ryzen 9 5900 and Ryzen 7 7840U 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	AM4	FP8
Power consumption (TDP)	65 Watt	28 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 5900 and Ryzen 7 7840U. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 5900 and Ryzen 7 7840U are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 5900 and Ryzen 7 7840U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5-5600
Maximum memory size	128 GB	no data
Maximum memory bandwidth	51.196 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

-

AMD Radeon 780M

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 5900 and Ryzen 7 7840U.

PCIe version	4.0	4.0
PCI Express lanes	no data	20

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.

Ryzen 9 5900 outperforms Ryzen 7 7840U by 38% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	22.24	16.16
Physical cores	12	8
Threads	24	16
Chip lithography	7 nm	4 nm
Power consumption (TDP)	65 Watt	28 Watt

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Should you still have questions on choice between Ryzen 9 5900 and Ryzen 7 7840U, ask them in Comments section, and we shall answer.

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