EPYC 9455 vs Xeon Gold 6421N

Primary details

Comparing Xeon Gold 6421N and EPYC 9455 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	90	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	44.63	no data
Market segment	Server	Server
Power efficiency	18.94	no data
Architecture codename	Sapphire Rapids (2023−2024)	Turin (2024)
Release date	10 January 2023 (1 year ago)	10 October 2024 (less than a year ago)
Launch price (MSRP)	$2,368	$5,412

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon Gold 6421N 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	32 (Dotriaconta-Core)	48 (Octatetraconta-Core)
Threads	64	96
Base clock speed	1.8 GHz	3.15 GHz
Boost clock speed	3.6 GHz	4.4 GHz
L1 cache	80K (per core)	80 KB (per core)
L2 cache	2 MB (per core)	1 MB (per core)
L3 cache	60 MB	192 MB (shared)
Chip lithography	Intel 7 nm	4 nm
Die size	no data	6x 70.6 mm2
Maximum case temperature (TCase)	85 °C	no data
Number of transistors	no data	49,890 million
64 bit support	+	+

Compatibility

Information on Xeon Gold 6421N 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	2
Socket	FCLGA4677	SP5
Power consumption (TDP)	185 Watt	300 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon Gold 6421N and EPYC 9455. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® AMX, Intel® SSE4.2, Intel® AVX, Intel® AVX2, Intel® AVX-512	no data
AES-NI	+	+
AVX	+	+
vPro	+	no data
Enhanced SpeedStep (EIST)	+	no data
Speed Shift	+	no data
Turbo Boost Technology	2.0	no data
Hyper-Threading Technology	+	no data
TSX	+	-
Precision Boost 2	no data	+
Deep Learning Boost	+	-

Security technologies

Xeon Gold 6421N and EPYC 9455 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data
SGX	Yes with Intel® SPS	no data
OS Guard	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon Gold 6421N and EPYC 9455 are enumerated here.

AMD-V	-	+
VT-d	+	no data
VT-x	+	no data
EPT	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon Gold 6421N and EPYC 9455. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR5-4400	DDR5
Maximum memory size	4 TB	no data
Max memory channels	8	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 Xeon Gold 6421N and EPYC 9455.

PCIe version	5	5.0
PCI Express lanes	80	128

Pros & cons summary

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Recency	10 January 2023	10 October 2024
Physical cores	32	48
Threads	64	96
Power consumption (TDP)	185 Watt	300 Watt

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Should you still have questions on choice between Xeon Gold 6421N and EPYC 9455, ask them in Comments section, and we shall answer.

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