EPYC 7401 vs EPYC 7551P

Primary details

Comparing EPYC 7551P and EPYC 7401 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	174	87
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	22.83	15.71
Market segment	Server	Server
Series	AMD EPYC	AMD EPYC
Architecture codename	Naples (2017−2018)	Naples (2017−2018)
Release date	29 June 2017 (6 years ago)	29 June 2017 (6 years ago)
Launch price (MSRP)	$2,100	$1,850
Current price	$531 (0.3x MSRP)	$1477 (0.8x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7551P has 45% better value for money than EPYC 7401.

Detailed specifications

EPYC 7551P and EPYC 7401 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)	24 (Tetracosa-Core)
Threads	64	48
Base clock speed	2 GHz	2 GHz
Boost clock speed	3 GHz	3 GHz
L1 cache	96K (per core)	96K (per core)
L2 cache	512K (per core)	512K (per core)
L3 cache	64 MB (shared)	64 MB (shared)
Chip lithography	14 nm	14 nm
Die size	192 mm2	192 mm2
Number of transistors	4,800 million	4,800 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	Yes	Yes

Compatibility

Information on EPYC 7551P and EPYC 7401 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 (Multiprocessor)
Socket	TR4	TR4
Power consumption (TDP)	180 Watt	170 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7551P and EPYC 7401. 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 7551P and EPYC 7401 are enumerated here.

AMD-V

+

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7551P and EPYC 7401. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR4 Eight-channel	DDR4 Eight-channel
Maximum memory size	2 TiB	2 TiB
Max memory channels	8	8
Maximum memory bandwidth	170.671 GB/s	170.671 GB/s
ECC memory support	+	+

Peripherals

Specifications and connection of peripherals supported by EPYC 7551P and EPYC 7401.

PCIe version	3.0	3.0
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.

EPYC 7401 outperforms EPYC 7551P by 44% based on our aggregated benchmark results.

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Pros & cons summary

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Performance score	24.83	35.74
Physical cores	32	24
Threads	64	48
Cost	$2100	$1850
Power consumption (TDP)	180 Watt	170 Watt

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Should you still have questions on choice between EPYC 7551P and EPYC 7401, ask them in Comments section, and we shall answer.

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