EPYC 7643P vs EPYC 7551P

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Aggregate performance score

EPYC 7551P
2017
32 cores / 64 threads, 180 Watt
24.03
EPYC 7643P
2023
48 cores / 96 threads, 225 Watt
43.23
+79.9%

EPYC 7643P outperforms EPYC 7551P by an impressive 80% based on our aggregate benchmark results.

Primary details

Comparing EPYC 7551P and EPYC 7643P processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking21250
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation4.1713.71
Market segmentServerServer
SeriesAMD EPYCno data
Power efficiency12.6318.18
Architecture codenameNaples (2017−2018)Milan (2021−2023)
Release date20 June 2017 (7 years ago)5 September 2023 (1 year ago)
Launch price (MSRP)$2,100$2,722

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7643P has 229% better value for money than EPYC 7551P.

Detailed specifications

EPYC 7551P and EPYC 7643P 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 cores32 (Dotriaconta-Core)48 (Octatetraconta-Core)
Threads6496
Base clock speed2 GHz2.3 GHz
Boost clock speed2 GHz3.6 GHz
Multiplier20no data
L1 cache3 MB64 KB (per core)
L2 cache16 MB512 KB (per core)
L3 cache64 MB (shared)256 MB (shared)
Chip lithography14 nm7 nm
Die size213 mm28x 81 mm2
Number of transistors19200 Million33,200 million
64 bit support+-
Windows 11 compatibility-no data
Unlocked multiplier+-

Compatibility

Information on EPYC 7551P and EPYC 7643P 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 configuration1 (Uniprocessor)1
SocketTR4SP3
Power consumption (TDP)180 Watt225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7551P and EPYC 7643P. You'll probably need this information if you require some particular technology.

AES-NI++
AVX++
Precision Boost 2no data+

Virtualization technologies

Virtual machine speed-up technologies supported by EPYC 7551P and EPYC 7643P are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7551P and EPYC 7643P. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4 Eight-channelDDR4
Maximum memory size2 TiBno data
Max memory channels8no data
Maximum memory bandwidth170.671 GB/sno data
ECC memory support+-

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataN/A

Peripherals

Specifications and connection of peripherals supported by EPYC 7551P and EPYC 7643P.

PCIe version3.04.0
PCI Express lanes128128

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


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 7551P 24.03
EPYC 7643P 43.23
+79.9%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

EPYC 7551P 38166
EPYC 7643P 68675
+79.9%

Gaming performance

Pros & cons summary


Performance score 24.03 43.23
Recency 20 June 2017 5 September 2023
Physical cores 32 48
Threads 64 96
Chip lithography 14 nm 7 nm
Power consumption (TDP) 180 Watt 225 Watt

EPYC 7551P has 25% lower power consumption.

EPYC 7643P, on the other hand, has a 79.9% higher aggregate performance score, an age advantage of 6 years, 50% more physical cores and 50% more threads, and a 100% more advanced lithography process.

The EPYC 7643P is our recommended choice as it beats the EPYC 7551P in performance tests.


Should you still have questions on choice between EPYC 7551P and EPYC 7643P, ask them in Comments section, and we shall answer.

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AMD EPYC 7551P
EPYC 7551P
AMD EPYC 7643P
EPYC 7643P

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Community ratings

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