EPYC 7742 vs EPYC 7451

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Aggregate performance score

EPYC 7451
2017
24 cores / 48 threads, 180 Watt
16.28
EPYC 7742
2019
64 cores / 128 threads, 225 Watt
44.07
+171%

EPYC 7742 outperforms EPYC 7451 by a whopping 171% based on our aggregate benchmark results.

Primary details

Comparing EPYC 7451 and EPYC 7742 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking41145
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation1.793.55
Market segmentServerServer
SeriesAMD EPYCAMD EPYC
Power efficiency8.5618.54
Architecture codenameNaples (2017−2018)Zen 2 (2017−2020)
Release date20 June 2017 (7 years ago)7 August 2019 (5 years ago)
Launch price (MSRP)$2,400$6,950

Cost-effectiveness evaluation

Performance per price, higher is better.

EPYC 7742 has 98% better value for money than EPYC 7451.

Detailed specifications

EPYC 7451 and EPYC 7742 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 cores24 (Tetracosa-Core)64 (Tetrahexaconta-Core)
Threads48128
Base clock speed2.3 GHz2.25 GHz
Boost clock speed2.3 GHz3.4 GHz
Multiplier2322.5
L1 cache2.25 MB4 MB
L2 cache12 MB32 MB
L3 cache64 MB (shared)256 MB (shared)
Chip lithography14 nm7 nm, 14 nm
Die size213 mm2192 mm2
Number of transistors19200 Million4,800 million
64 bit support++
Windows 11 compatibility-+
Unlocked multiplier++

Compatibility

Information on EPYC 7451 and EPYC 7742 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 configuration2 (Multiprocessor)2 (Multiprocessor)
SocketTR4TR4
Power consumption (TDP)180 Watt225 Watt

Technologies and extensions

Technological solutions and additional instructions supported by EPYC 7451 and EPYC 7742. 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 7451 and EPYC 7742 are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by EPYC 7451 and EPYC 7742. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR4 Eight-channelDDR4 Eight-channel
Maximum memory size2 TiB4 TiB
Max memory channels88
Maximum memory bandwidth170.671 GB/s204.763 GB/s
ECC memory support++

Peripherals

Specifications and connection of peripherals supported by EPYC 7451 and EPYC 7742.

PCIe version3.0no data
PCI Express lanes128no data

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 7451 16.28
EPYC 7742 44.07
+171%

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 7451 25863
EPYC 7742 70007
+171%

Gaming performance

Pros & cons summary


Performance score 16.28 44.07
Recency 20 June 2017 7 August 2019
Physical cores 24 64
Threads 48 128
Chip lithography 14 nm 7 nm
Power consumption (TDP) 180 Watt 225 Watt

EPYC 7451 has 25% lower power consumption.

EPYC 7742, on the other hand, has a 170.7% higher aggregate performance score, an age advantage of 2 years, 166.7% more physical cores and 166.7% more threads, and a 100% more advanced lithography process.

The EPYC 7742 is our recommended choice as it beats the EPYC 7451 in performance tests.


Should you still have questions on choice between EPYC 7451 and EPYC 7742, ask them in Comments section, and we shall answer.

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AMD EPYC 7451
EPYC 7451
AMD EPYC 7742
EPYC 7742

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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4.3 129 votes

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Questions & comments

Here you can ask a question about EPYC 7451 or EPYC 7742, agree or disagree with our judgements, or report an error or mismatch.