EPYC 9825 vs EPYC 7643

Primary details

Comparing EPYC 7643 and EPYC 9825 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	39	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	6.71	no data
Market segment	Server	Server
Series	AMD EPYC	no data
Power efficiency	20.14	no data
Architecture codename	Milan (2021−2023)	Turin (2024)
Release date	12 January 2021 (3 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$4,995	$13,006

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7643 and EPYC 9825 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)	144
Threads	96	288
Base clock speed	2.3 GHz	2.2 GHz
Boost clock speed	3.6 GHz	3.7 GHz
Multiplier	23	no data
L1 cache	3 MB	80 KB (per core)
L2 cache	24 MB	1 MB (per core)
L3 cache	256 MB (shared)	384 MB (shared)
Chip lithography	7 nm+	3 nm
Die size	8x 81 mm2	no data
Number of transistors	33,200 million	no data
64 bit support	+	+
Windows 11 compatibility	+	no data

Compatibility

Information on EPYC 7643 and EPYC 9825 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	2
Socket	SP3	SP5
Power consumption (TDP)	225 Watt	390 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7643 and EPYC 9825. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+
Precision Boost 2	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7643 and EPYC 9825 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7643 and EPYC 9825. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR5
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

N/A

Peripherals

Specifications and connection of peripherals supported by EPYC 7643 and EPYC 9825.

PCIe version	4.0	5.0
PCI Express lanes	128	128

Pros & cons summary

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Recency	12 January 2021	10 October 2024
Physical cores	48	144
Threads	96	288
Chip lithography	7 nm	3 nm
Power consumption (TDP)	225 Watt	390 Watt

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