Ryzen 7 7800X vs Ryzen 9 3900XT

Primary details

Comparing Ryzen 9 3900XT and Ryzen 7 7800X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	274	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	26.06	no data
Market segment	Desktop processor	Desktop processor
Series	AMD Ryzen 9	AMD Ryzen 7
Power efficiency	18.53	no data
Architecture codename	Matisse 2 (2020)	Zen 4
Release date	16 June 2020 (4 years ago)	no data
Launch price (MSRP)	$499	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen 9 3900XT and Ryzen 7 7800X 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	3.8 GHz	4.2 GHz
Boost clock speed	4.7 GHz	5 GHz
L1 cache	768 KB	512 KB
L2 cache	6 MB	8 MB
L3 cache	64 MB	96 MB
Chip lithography	7 nm, 12 nm	5 nm, 6 nm
Die size	74 mm2	71+122 mm
Maximum case temperature (TCase)	95 °C	no data
Number of transistors	3,800 million	no data
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	+	+

Compatibility

Information on Ryzen 9 3900XT and Ryzen 7 7800X 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	AM4	no data
Power consumption (TDP)	105 Watt	120 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3900XT and Ryzen 7 7800X. You'll probably need this information if you require some particular technology.

AES-NI	+	-
AVX	+	-
Precision Boost 2	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 3900XT and Ryzen 7 7800X are enumerated here.

AMD-V

+

-

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3900XT and Ryzen 7 7800X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	no data
Maximum memory size	128 GB	128 GB
Max memory channels	2	no data
Maximum memory bandwidth	51.196 GB/s	no data
ECC memory support	+	-

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 3900XT and Ryzen 7 7800X.

PCIe version

4.0

no data

Pros & cons summary

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Physical cores	12	8
Threads	24	16
Chip lithography	7 nm	5 nm
Power consumption (TDP)	105 Watt	120 Watt

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Should you still have questions on choice between Ryzen 9 3900XT and Ryzen 7 7800X, ask them in Comments section, and we shall answer.

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