EPYC 9745 vs Ryzen 9 3900

Primary details

Comparing Ryzen 9 3900 and EPYC 9745 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	289	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	20.00	no data
Market segment	Desktop processor	Server
Series	AMD Matisse (Ryzen 3000 Desktop)	no data
Power efficiency	28.23	no data
Architecture codename	Matisse (Zen 2) (2019−2020)	Turin (2024)
Release date	24 September 2019 (5 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$499	$12,141

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Ryzen 9 3900 and EPYC 9745 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)	128
Threads	24	256
Base clock speed	3.1 GHz	2.4 GHz
Boost clock speed	4.3 GHz	3.7 GHz
L1 cache	64 KB (per core)	80 KB (per core)
L2 cache	512 KB (per core)	1 MB (per core)
L3 cache	64 MB	256 MB (shared)
Chip lithography	7 nm, 12 nm	3 nm
Die size	2x 74 mm2	no data
Number of transistors	7,600 million	no data
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	+	-

Compatibility

Information on Ryzen 9 3900 and EPYC 9745 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	2
Socket	AM4	SP5
Power consumption (TDP)	65 Watt	400 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Ryzen 9 3900 and EPYC 9745. 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 3900 and EPYC 9745 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Ryzen 9 3900 and EPYC 9745. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5
Maximum memory size	128 GB	no data
Max memory channels	2	no data
Maximum memory bandwidth	51.196 GB/s	no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

N/A

Peripherals

Specifications and connection of peripherals supported by Ryzen 9 3900 and EPYC 9745.

PCIe version	4.0	5.0
PCI Express lanes	24	128

Pros & cons summary

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Recency	24 September 2019	10 October 2024
Physical cores	12	128
Threads	24	256
Chip lithography	7 nm	3 nm
Power consumption (TDP)	65 Watt	400 Watt

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Should you still have questions on choice between Ryzen 9 3900 and EPYC 9745, ask them in Comments section, and we shall answer.

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