Ryzen 9 7950X vs EPYC 7643

Primary details

Comparing EPYC 7643 and Ryzen 9 7950X processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	38	67
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	6.71	no data
Market segment	Server	Desktop processor
Series	AMD EPYC	no data
Power efficiency	20.14	21.97
Architecture codename	Milan (2021−2023)	Raphael (Zen 4) (2022)
Release date	12 January 2021 (3 years ago)	27 September 2022 (2 years ago)
Launch price (MSRP)	$4,995	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7643 and Ryzen 9 7950X 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	48 (Octatetraconta-Core)	16 (Hexadeca-Core)
Threads	96	32
Base clock speed	2.3 GHz	4.5 GHz
Boost clock speed	3.6 GHz	5.7 GHz
Multiplier	23	no data
L1 cache	3 MB	64K (per core)
L2 cache	24 MB	1 MB (per core)
L3 cache	256 MB (shared)	64 MB (shared)
Chip lithography	7 nm+	5 nm
Die size	8x 81 mm2	CCD = 2x 70 sq. mm, I/O = 122 mm2
Maximum core temperature	no data	95 °C
Maximum case temperature (TCase)	no data	47 °C
Number of transistors	33,200 million	13140 Million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	-	+

Compatibility

Information on EPYC 7643 and Ryzen 9 7950X 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	2	1
Socket	SP3	AM5
Power consumption (TDP)	225 Watt	170 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7643 and Ryzen 9 7950X. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	CCD = 5 nm, I/O = 6 nm, 0.650 - 1.475 V
AES-NI	+	+
AVX	+	+
Precision Boost 2	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7643 and Ryzen 9 7950X are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7643 and Ryzen 9 7950X. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5-5200
Maximum memory size	4 TiB	no data
Maximum memory bandwidth	204.795 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

AMD Radeon Graphics (Ryzen 7000) (400 - 2200 MHz)

Peripherals

Specifications and connection of peripherals supported by EPYC 7643 and Ryzen 9 7950X.

PCIe version	4.0	5.0
PCI Express lanes	128	24

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	47.88	39.46
Recency	12 January 2021	27 September 2022
Physical cores	48	16
Threads	96	32
Chip lithography	7 nm	5 nm
Power consumption (TDP)	225 Watt	170 Watt

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Should you still have questions on choice between EPYC 7643 and Ryzen 9 7950X, ask them in Comments section, and we shall answer.

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