Xeon Gold 6438Y vs EPYC 7551

Primary details

Comparing EPYC 7551 and Xeon Gold 6438Y processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	399	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	1.32	no data
Market segment	Server	Server
Series	AMD EPYC	no data
Power efficiency	8.59	no data
Architecture codename	Naples (2017−2018)	no data
Release date	20 June 2017 (7 years ago)	1 January 2023 (1 year ago)
Launch price (MSRP)	$3,400	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

EPYC 7551 and Xeon Gold 6438Y 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)	32 (Dotriaconta-Core)
Threads	64	64
Base clock speed	2 GHz	2 GHz
Boost clock speed	2 GHz	4 GHz
Multiplier	20	no data
L1 cache	3 MB	no data
L2 cache	16 MB	no data
L3 cache	64 MB (shared)	60 MB
Chip lithography	14 nm	Intel 7 nm
Die size	213 mm2	no data
Maximum core temperature	no data	76 °C
Number of transistors	19200 Million	no data
64 bit support	+	-
Windows 11 compatibility	-	no data
Unlocked multiplier	+	-

Compatibility

Information on EPYC 7551 and Xeon Gold 6438Y 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)	no data
Socket	TR4	FCLGA4677
Power consumption (TDP)	180 Watt	205 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7551 and Xeon Gold 6438Y. You'll probably need this information if you require some particular technology.

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

Security technologies

EPYC 7551 and Xeon Gold 6438Y technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7551 and Xeon Gold 6438Y 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 EPYC 7551 and Xeon Gold 6438Y. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR5-4800, DDR5-4400
Maximum memory size	2 TiB	4 TB
Max memory channels	8	8
Maximum memory bandwidth	170.671 GB/s	no data
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by EPYC 7551 and Xeon Gold 6438Y.

PCIe version	3.0	5
PCI Express lanes	128	80

Pros & cons summary

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Recency	20 June 2017	1 January 2023
Power consumption (TDP)	180 Watt	205 Watt

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Should you still have questions on choice between EPYC 7551 and Xeon Gold 6438Y, ask them in Comments section, and we shall answer.

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