EPYC 9455 vs EPYC 7401P

Primary details

Comparing EPYC 7401P and EPYC 9455 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	339	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	4.65	no data
Market segment	Server	Server
Series	AMD EPYC	no data
Power efficiency	10.00	no data
Architecture codename	Naples (2017−2018)	Turin (2024)
Release date	20 June 2017 (7 years ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$1,075	$5,412

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7401P and EPYC 9455 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	24 (Tetracosa-Core)	48 (Octatetraconta-Core)
Threads	48	96
Base clock speed	2 GHz	3.15 GHz
Boost clock speed	2 GHz	4.4 GHz
Multiplier	20	no data
L1 cache	2.25 MB	80 KB (per core)
L2 cache	12 MB	1 MB (per core)
L3 cache	64 MB (shared)	192 MB (shared)
Chip lithography	14 nm	4 nm
Die size	213 mm2	6x 70.6 mm2
Number of transistors	19200 Million	49,890 million
64 bit support	+	+
Windows 11 compatibility	-	no data
Unlocked multiplier	+	-

Compatibility

Information on EPYC 7401P and EPYC 9455 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)	2
Socket	TR4	SP5
Power consumption (TDP)	155 W, 170 Watt	300 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7401P and EPYC 9455. 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 7401P and EPYC 9455 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7401P and EPYC 9455. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR5
Maximum memory size	2 TiB	no data
Max memory channels	8	no data
Maximum memory bandwidth	170.671 GB/s	no data
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 7401P and EPYC 9455.

PCIe version	3.0	5.0
PCI Express lanes	128	128

Pros & cons summary

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Recency	20 June 2017	10 October 2024
Physical cores	24	48
Threads	48	96
Chip lithography	14 nm	4 nm
Power consumption (TDP)	155 Watt	300 Watt

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