EPYC 7643 vs EPYC 7453

Primary details

Comparing EPYC 7453 and EPYC 7643 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	126	38
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	17.18	6.59
Market segment	Server	Server
Series	AMD EPYC	AMD EPYC
Power efficiency	13.39	20.14
Architecture codename	Milan (2021−2023)	Milan (2021−2023)
Release date	12 January 2021 (3 years ago)	12 January 2021 (3 years ago)
Launch price (MSRP)	$1,570	$4,995

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7453 has 161% better value for money than EPYC 7643.

Detailed specifications

EPYC 7453 and EPYC 7643 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	28 (Octacosa-Core)	48 (Octatetraconta-Core)
Threads	56	96
Base clock speed	2.75 GHz	2.3 GHz
Boost clock speed	3.45 GHz	3.6 GHz
Multiplier	27.5	23
L1 cache	1792 KB	3 MB
L2 cache	14 MB	24 MB
L3 cache	64 MB (shared)	256 MB (shared)
Chip lithography	7 nm+	7 nm+
Die size	4x 81 mm2	8x 81 mm2
Number of transistors	16,600 million	33,200 million
64 bit support	+	+
Windows 11 compatibility	+	+

Compatibility

Information on EPYC 7453 and EPYC 7643 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	SP3
Power consumption (TDP)	225 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7453 and EPYC 7643. You'll probably need this information if you require some particular technology.

AES-NI	+	+
AVX	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7453 and EPYC 7643 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7453 and EPYC 7643. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4-3200	DDR4-3200
Maximum memory size	4 TiB	4 TiB
Maximum memory bandwidth	204.795 GB/s	204.795 GB/s

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 7453 and EPYC 7643.

PCIe version	4.0	4.0
PCI Express lanes	128	128

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	33.05	49.69
Physical cores	28	48
Threads	56	96

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Should you still have questions on choice between EPYC 7453 and EPYC 7643, ask them in Comments section, and we shall answer.

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