AMD EPYC 7742 vs AMD EPYC 7351

Comparative analysis of AMD EPYC 7742 and AMD EPYC 7351 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
  • 48 more cores, run more applications at once: 64 vs 16
  • 96 more threads: 128 vs 32
  • Around 17% higher clock speed: 3.4 GHz vs 2.9 GHz
  • A newer manufacturing process allows for a more powerful, yet cooler running processor: 7 nm, 14 nm vs 14 nm
  • 2.7x more L1 cache, more data can be stored in the L1 cache for quick access later
  • 4x 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
  • Around 22% better performance in PassMark - Single thread mark: 2220 vs 1821
  • 2.7x better performance in PassMark - CPU mark: 64071 vs 23566
Specifications (specs)
Launch date 7 Aug 2019 vs June 2017
Number of cores 64 vs 16
Number of threads 128 vs 32
Maximum frequency 3.4 GHz vs 2.9 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
Benchmarks
PassMark - Single thread mark 2220 vs 1821
PassMark - CPU mark 64071 vs 23566

Reasons to consider the AMD EPYC 7351

  • 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 7351

PassMark - Single thread mark
CPU 1
CPU 2
2220
1821
PassMark - CPU mark
CPU 1
CPU 2
64071
23566
Name AMD EPYC 7742 AMD EPYC 7351
PassMark - Single thread mark 2220 1821
PassMark - CPU mark 64071 23566
Geekbench 4 - Single Core 3547
Geekbench 4 - Multi-Core 23587

Compare specifications (specs)

AMD EPYC 7742 AMD EPYC 7351

Essentials

Architecture codename Zen 2 Zen
Launch date 7 Aug 2019 June 2017
Place in performance rating 19 118
Vertical segment Server Server
Family AMD EPYC
Series AMD EPYC 7000 Series

Performance

Base frequency 2.25 GHz 2.4 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 2.9 GHz
Number of cores 64 16
Number of threads 128 32
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™)