AMD EPYC 7642 vs AMD EPYC 7401

Comparative analysis of AMD EPYC 7642 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.

AMD EPYC 7642

AMD EPYC 7401

Differences

Reasons to consider the AMD EPYC 7642

CPU is newer: launch date 2 year(s) 2 month(s) later
24 more cores, run more applications at once: 48 vs 24
48 more threads: 96 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 vs 14 nm
2x more L1 cache, more data can be stored in the L1 cache for quick access later
2x 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 16% better performance in PassMark - Single thread mark: 2142 vs 1850
Around 68% better performance in PassMark - CPU mark: 92995 vs 55280

Specifications (specs)
Launch date	7 Aug 2019 vs June 2017
Number of cores	48 vs 24
Number of threads	96 vs 48
Maximum frequency	3.4 GHz vs 3 GHz
Manufacturing process technology	7 nm vs 14 nm
L1 cache	4.5 MB vs 96 KB (per core)
L2 cache	24 MB vs 512 KB (per core)
L3 cache	256 MB vs 64 MB
Benchmarks
PassMark - Single thread mark	2142 vs 1850
PassMark - CPU mark	92995 vs 55280

Reasons to consider the AMD EPYC 7401

Around 32% lower typical power consumption: 155/170 Watt vs 225 Watt

Thermal Design Power (TDP)	155/170 Watt vs 225 Watt

Compare benchmarks

CPU 1: AMD EPYC 7642
CPU 2: AMD EPYC 7401

PassMark - Single thread mark

CPU 1

CPU 2

2142

1850

PassMark - CPU mark

CPU 1

CPU 2

92995

55280

Name	AMD EPYC 7642	AMD EPYC 7401
PassMark - Single thread mark	2142	1850
PassMark - CPU mark	92995	55280
Geekbench 4 - Single Core		3541
Geekbench 4 - Multi-Core		24681

Compare specifications (specs)

	AMD EPYC 7642	AMD EPYC 7401
Essentials
Architecture codename	Zen 2	Zen
Launch date	7 Aug 2019	June 2017
Place in performance rating	146	141
Vertical segment	Server	Server
Family		AMD EPYC
Series		AMD EPYC 7000 Series
Performance
Base frequency	2.4 GHz	2 GHz
L1 cache	4.5 MB	96 KB (per core)
L2 cache	24 MB	512 KB (per core)
L3 cache	256 MB	64 MB
Manufacturing process technology	7 nm	14 nm
Maximum frequency	3.4 GHz	3 GHz
Number of cores	48	24
Number of threads	96	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™)