Ryzen 9 7900 vs EPYC 7662

Primary details

Comparing EPYC 7662 and Ryzen 9 7900 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	35	115
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	66.59
Market segment	Server	Desktop processor
Series	AMD EPYC	no data
Architecture codename	Zen 2 (2019−2020)	Raphael (Zen4)
Release date	19 February 2020 (4 years ago)	14 January 2023 (1 year ago)
Current price	no data	$487

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7662 and Ryzen 9 7900 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	64 (Tetrahexaconta-Core)	12 (Dodeca-Core)
Threads	128	24
Base clock speed	2 GHz	3.7 GHz
Boost clock speed	3.3 GHz	5.4 GHz
L1 cache	4 MB	64K (per core)
L2 cache	32 MB	1 MB (per core)
L3 cache	256 MB	64 MB (shared)
Chip lithography	7 nm, 14 nm	5 nm
Die size	no data	2x 71 mm2
Maximum core temperature	no data	95 °C
Maximum case temperature (TCase)	no data	47 °C
Number of transistors	no data	13,140 million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	No	Yes

Compatibility

Information on EPYC 7662 and Ryzen 9 7900 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	no data	1
Socket	Socket SP3	AM5
Power consumption (TDP)	225 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7662 and Ryzen 9 7900. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	5 nm, 0.650 - 1.475V
AES-NI	+	+
AVX	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7662 and Ryzen 9 7900 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7662 and Ryzen 9 7900. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5-5200
Maximum memory size	4 TiB	no data
Max memory channels	8	no data
Maximum memory bandwidth	204.763 GB/s	no data
ECC memory support	+	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

AMD Radeon Graphics (Ryzen 7000)

Peripherals

Specifications and connection of peripherals supported by EPYC 7662 and Ryzen 9 7900.

PCIe version	no data	5.0
PCI Express lanes	no data	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.

EPYC 7662 outperforms Ryzen 9 7900 by 49% based on our aggregate benchmark results.

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Pros & cons summary

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Performance score	46.97	31.60
Recency	19 February 2020	14 January 2023
Physical cores	64	12
Threads	128	24
Chip lithography	7 nm	5 nm
Power consumption (TDP)	225 Watt	65 Watt

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Should you still have questions on choice between EPYC 7662 and Ryzen 9 7900, ask them in Comments section, and we shall answer.

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