EPYC 7662 vs Ryzen 9 3900X

Primary details

Comparing Ryzen 9 3900X and EPYC 7662 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	269	43
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	20.48	no data
Market segment	Desktop processor	Server
Series	AMD Ryzen 9	AMD EPYC
Power efficiency	18.50	19.13
Architecture codename	Matisse (Zen 2) (2019−2020)	Zen 2 (2017−2020)
Release date	7 July 2019 (5 years ago)	19 February 2020 (4 years ago)
Launch price (MSRP)	$499	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen 9 3900X and EPYC 7662 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)	64 (Tetrahexaconta-Core)
Threads	24	128
Base clock speed	3.8 GHz	2 GHz
Boost clock speed	4.6 GHz	3.3 GHz
Multiplier	no data	20
L1 cache	768 KB	4 MB
L2 cache	6 MB	32 MB
L3 cache	64 MB	256 MB
Chip lithography	7 nm, 12 nm	7 nm, 14 nm
Maximum core temperature	95 °C	no data
Number of transistors	19,200 million	no data
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	+	-

Compatibility

Information on Ryzen 9 3900X and EPYC 7662 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)	no data
Socket	AM4	Socket SP3
Power consumption (TDP)	105 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3900X and EPYC 7662. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+
Precision Boost 2	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Ryzen 9 3900X and EPYC 7662 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3900X and EPYC 7662. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Dual-channel	DDR4-3200
Maximum memory size	128 GB	4 TiB
Max memory channels	2	8
Maximum memory bandwidth	51.196 GB/s	204.763 GB/s
ECC memory support	-	+

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	20.61	45.68
Recency	7 July 2019	19 February 2020
Physical cores	12	64
Threads	24	128
Power consumption (TDP)	105 Watt	225 Watt

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Should you still have questions on choice between Ryzen 9 3900X and EPYC 7662, ask them in Comments section, and we shall answer.

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