EPYC 7543 vs EPYC 7742

Primary details

Comparing EPYC 7742 and EPYC 7543 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	45	76
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.55	8.04
Market segment	Server	Server
Series	AMD EPYC	AMD EPYC
Power efficiency	18.54	16.13
Architecture codename	Zen 2 (2017−2020)	Milan (2021−2023)
Release date	7 August 2019 (5 years ago)	15 March 2021 (3 years ago)
Launch price (MSRP)	$6,950	$3,761

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7543 has 126% better value for money than EPYC 7742.

Detailed specifications

EPYC 7742 and EPYC 7543 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)	32 (Dotriaconta-Core)
Threads	128	64
Base clock speed	2.25 GHz	2.8 GHz
Boost clock speed	3.4 GHz	3.7 GHz
Multiplier	22.5	28
L1 cache	96K (per core)	64 KB (per core)
L2 cache	512K (per core)	512 KB (per core)
L3 cache	256 MB (shared)	256 MB (shared)
Chip lithography	7 nm, 14 nm	7 nm+
Die size	192 mm2	8x 81 mm2
Number of transistors	4,800 million	33,200 million
64 bit support	+	+
Windows 11 compatibility	+	+
Unlocked multiplier	+	-

Compatibility

Information on EPYC 7742 and EPYC 7543 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 (Multiprocessor)	2
Socket	TR4	SP3
Power consumption (TDP)	225 Watt	225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7742 and EPYC 7543. 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 7742 and EPYC 7543 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7742 and EPYC 7543. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR4-3200
Maximum memory size	4 TiB	4 TiB
Max memory channels	8	no data
Maximum memory bandwidth	204.763 GB/s	204.795 GB/s
ECC memory support	+	-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

N/A

Peripherals

Specifications and connection of peripherals supported by EPYC 7742 and EPYC 7543.

PCIe version	no data	4.0
PCI Express lanes	no data	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	44.07	38.34
Recency	7 August 2019	15 March 2021
Physical cores	64	32
Threads	128	64

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Should you still have questions on choice between EPYC 7742 and EPYC 7543, ask them in Comments section, and we shall answer.

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