Ryzen 9 3900X vs Ryzen 7 3800X

Primary details

Comparing Ryzen 7 3800X and Ryzen 9 3900X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	496	275
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	16.44	21.73
Market segment	Desktop processor	Desktop processor
Series	AMD Ryzen 7	AMD Ryzen 9
Power efficiency	13.12	15.54
Architecture codename	Matisse (2019−2020)	Matisse (Zen 2) (2019−2020)
Release date	27 May 2019 (5 years ago)	7 July 2019 (5 years ago)
Launch price (MSRP)	$399	$499

Cost-effectiveness evaluation

Performance per price, higher is better.

Ryzen 9 3900X has 32% better value for money than Ryzen 7 3800X.

Detailed specifications

Ryzen 7 3800X and Ryzen 9 3900X 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	8 (Octa-Core)	12 (Dodeca-Core)
Threads	16	24
Base clock speed	3.9 GHz	3.8 GHz
Boost clock speed	4.5 GHz	4.6 GHz
L1 cache	512 KB	768 KB
L2 cache	4 MB	6 MB
L3 cache	32 MB	64 MB
Chip lithography	7 nm, 12 nm	7 nm, 12 nm
Maximum core temperature	no data	95 °C
Number of transistors	19,200 million	19,200 million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	+	+

Compatibility

Information on Ryzen 7 3800X and Ryzen 9 3900X 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 (Uniprocessor)
Socket	AM4	AM4
Power consumption (TDP)	105 Watt	105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 7 3800X and Ryzen 9 3900X. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+
Precision Boost 2	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 7 3800X and Ryzen 9 3900X are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 7 3800X and Ryzen 9 3900X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Dual-channel	DDR4 Dual-channel
Maximum memory size	128 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	51.196 GB/s	51.196 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

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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	14.56	20.53
Physical cores	8	12
Threads	16	24

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Should you still have questions on choice between Ryzen 7 3800X and Ryzen 9 3900X, ask them in Comments section, and we shall answer.

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