AMD EPYC 7742 vs AMD EPYC 7401

Comparative analysis of AMD EPYC 7742 and AMD EPYC 7401 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core.

 

Differences

Reasons to consider the AMD EPYC 7742

  • CPU is newer: launch date 2 year(s) 2 month(s) later
  • 40 more cores, run more applications at once: 64 vs 24
  • 80 more threads: 128 vs 48
  • Around 13% higher clock speed: 3.4 GHz vs 3 GHz
  • A newer manufacturing process allows for a more powerful, yet cooler running processor: 7 nm, 14 nm vs 14 nm
  • Around 78% more L1 cache; more data can be stored in the L1 cache for quick access later
  • 2.7x more L2 cache, more data can be stored in the L2 cache for quick access later
  • 4x more L3 cache, more data can be stored in the L3 cache for quick access later
Launch date 7 Aug 2019 vs June 2017
Number of cores 64 vs 24
Number of threads 128 vs 48
Maximum frequency 3.4 GHz vs 3 GHz
Manufacturing process technology 7 nm, 14 nm vs 14 nm
L1 cache 4 MB vs 96 KB (per core)
L2 cache 32 MB vs 512 KB (per core)
L3 cache 256 MB vs 64 MB

Reasons to consider the AMD EPYC 7401

  • Processor is unlocked, an unlocked multiplier allows for easier overclocking
  • Around 32% lower typical power consumption: 155/170 Watt vs 225 Watt
Unlocked Unlocked vs Locked
Thermal Design Power (TDP) 155/170 Watt vs 225 Watt

Compare benchmarks

CPU 1: AMD EPYC 7742
CPU 2: AMD EPYC 7401

Name AMD EPYC 7742 AMD EPYC 7401
PassMark - Single thread mark 2296
PassMark - CPU mark 47365
Geekbench 4 - Single Core 3541
Geekbench 4 - Multi-Core 24681

Compare specifications (specs)

AMD EPYC 7742 AMD EPYC 7401

Essentials

Architecture codename Zen 2 Zen
Launch date 7 Aug 2019 June 2017
Place in performance rating 1 122
Vertical segment Server Server
Family AMD EPYC
Series AMD EPYC 7000 Series

Performance

Base frequency 2.25 GHz 2 GHz
L1 cache 4 MB 96 KB (per core)
L2 cache 32 MB 512 KB (per core)
L3 cache 256 MB 64 MB
Manufacturing process technology 7 nm, 14 nm 14 nm
Maximum frequency 3.4 GHz 3 GHz
Number of cores 64 24
Number of threads 128 48
Unlocked
64 bit support
Die size 192 mm
Transistor count 4800 million

Memory

ECC memory support
Max memory channels 8 8
Maximum memory bandwidth 190.7 GB/s 307/341 GB/s
Maximum memory size 4 TB
Supported memory types DDR4-3200 DDR4
Supported memory frequency 2400/2666 MHz

Compatibility

Max number of CPUs in a configuration 2 2
Sockets supported SP3 TR4
Thermal Design Power (TDP) 225 Watt 155/170 Watt
Socket Count 1P/2P

Peripherals

Max number of PCIe lanes 128
PCI Express revision 4.0 x128
PCIe configurations x16, x8

Advanced Technologies

AMD SenseMI
Fused Multiply-Add 3 (FMA3)
Intel® Advanced Vector Extensions (AVX)
Intel® Advanced Vector Extensions 2 (AVX2)
Intel® AES New Instructions

Virtualization

AMD Virtualization (AMD-V™)