EPYC 9645 vs Ryzen 9 3950X

Primary details

Comparing Ryzen 9 3950X and EPYC 9645 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	205	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	18.01	no data
Market segment	Desktop processor	Server
Series	AMD Ryzen 9	no data
Power efficiency	21.98	no data
Architecture codename	Matisse (Zen 2) (2019−2020)	Turin (2024)
Release date	14 November 2019 (5 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$799	$11,048

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen 9 3950X and EPYC 9645 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)	96
Threads	32	192
Base clock speed	3.5 GHz	2.3 GHz
Boost clock speed	4.7 GHz	3.7 GHz
L1 cache	96K (per core)	80 KB (per core)
L2 cache	512K (per core)	1 MB (per core)
L3 cache	64 MB	256 MB (shared)
Chip lithography	7 nm, 12 nm	3 nm
Die size	2 x 72 mm + 125 mm (IO-Die) mm2	no data
Number of transistors	19,200 million	no data
64 bit support	+	+
Windows 11 compatibility	+	no data
Unlocked multiplier	+	-

Compatibility

Information on Ryzen 9 3950X and EPYC 9645 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)	2
Socket	AM4	SP5
Power consumption (TDP)	105 Watt	320 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3950X and EPYC 9645. You'll probably need this information if you require some particular technology.

Instruction set extensions	86x MMX(+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A,-64, AMD-V, AES, AVX, AVX2, FMA3, SHA, Precision Boost 2	no data
AES-NI	+	+
AVX	+	+
Precision Boost 2	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 3950X and EPYC 9645 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3950X and EPYC 9645. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Dual-channel	DDR5
Maximum memory size	128 GB	no data
Maximum memory bandwidth	51.196 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

-

N/A

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 3950X and EPYC 9645.

PCIe version	no data	5.0
PCI Express lanes	no data	128

Pros & cons summary

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Recency	14 November 2019	10 October 2024
Physical cores	16	96
Threads	32	192
Chip lithography	7 nm	3 nm
Power consumption (TDP)	105 Watt	320 Watt

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