Ryzen 9 7940HS vs EPYC 7351

Primary details

Comparing EPYC 7351 and Ryzen 9 7940HS processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	483	299
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.21	no data
Market segment	Server	Laptop
Series	AMD EPYC	no data
Power efficiency	8.14	51.72
Architecture codename	Naples (2017−2018)	Phoenix-HS (Zen 4) (2023)
Release date	20 June 2017 (7 years ago)	January 2023 (1 year ago)
Launch price (MSRP)	$1,100	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7351 and Ryzen 9 7940HS 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)	8 (Octa-Core)
Threads	32	16
Base clock speed	2.4 GHz	4 GHz
Boost clock speed	2.4 GHz	5.2 GHz
Multiplier	24	no data
L1 cache	1.5 MB	64K (per core)
L2 cache	8 MB	1 MB (per core)
L3 cache	64 MB (shared)	16 MB (shared)
Chip lithography	14 nm	4 nm
Die size	213 mm2	178 mm2
Maximum core temperature	no data	100 °C
Number of transistors	19200 Million	25,000 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	+	-

Compatibility

Information on EPYC 7351 and Ryzen 9 7940HS 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 (Multiprocessor)	1
Socket	TR4	FP8
Power consumption (TDP)	155 W, 170 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7351 and Ryzen 9 7940HS. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Ryzen AI, MMX, SSE, SSE2, SSE3, SSSE3, SSE4A, SSE4.1, SSE4.2, AVX, AVX2, AVX-512, BMI2, ABM, FMA, ADX, SMEP, SMAP, SMT, CPB, AES-NI, RDRAND, RDSEED, SHA, SME
AES-NI	+	+
FMA	-	+
AVX	+	+
Precision Boost 2	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7351 and Ryzen 9 7940HS are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7351 and Ryzen 9 7940HS. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR5
Maximum memory size	2 TiB	no data
Max memory channels	8	no data
Maximum memory bandwidth	170.671 GB/s	no data
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

AMD Radeon 780M

Peripherals

Specifications and connection of peripherals supported by EPYC 7351 and Ryzen 9 7940HS.

PCIe version	3.0	4.0
PCI Express lanes	128	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.

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Pros & cons summary

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Performance score	15.18	19.85
Physical cores	16	8
Threads	32	16
Chip lithography	14 nm	4 nm
Power consumption (TDP)	155 Watt	35 Watt

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Should you still have questions on choice between EPYC 7351 and Ryzen 9 7940HS, ask them in Comments section, and we shall answer.

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