AMD EPYC 7642 vs AMD EPYC 7742

Comparative analysis of AMD EPYC 7642 and AMD EPYC 7742 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.

AMD EPYC 7642

AMD EPYC 7742

Differences

Reasons to consider the AMD EPYC 7642

Processor is unlocked, an unlocked multiplier allows for easier overclocking
Around 13% more L1 cache; more data can be stored in the L1 cache for quick access later
Around 5% better performance in PassMark - Single thread mark: 2142 vs 2046

Specifications (specs)
Unlocked	Unlocked vs Locked
L1 cache	4.5 MB vs 4 MB
Benchmarks
PassMark - Single thread mark	2142 vs 2046

Reasons to consider the AMD EPYC 7742

16 more cores, run more applications at once: 64 vs 48
32 more threads: 128 vs 96
Around 33% more L2 cache; more data can be stored in the L2 cache for quick access later
Around 1% better performance in PassMark - CPU mark: 94081 vs 92995

Specifications (specs)
Number of cores	64 vs 48
Number of threads	128 vs 96
L2 cache	32 MB vs 24 MB
Benchmarks
PassMark - CPU mark	94081 vs 92995

Compare benchmarks

CPU 1: AMD EPYC 7642
CPU 2: AMD EPYC 7742

PassMark - Single thread mark

CPU 1

CPU 2

2142

2046

PassMark - CPU mark

CPU 1

CPU 2

92995

94081

Name	AMD EPYC 7642	AMD EPYC 7742
PassMark - Single thread mark	2142	2046
PassMark - CPU mark	92995	94081

Compare specifications (specs)

	AMD EPYC 7642	AMD EPYC 7742
Essentials
Architecture codename	Zen 2	Zen 2
Launch date	7 Aug 2019	7 Aug 2019
Place in performance rating	148	159
Vertical segment	Server	Server
Performance
Base frequency	2.4 GHz	2.25 GHz
L1 cache	4.5 MB	4 MB
L2 cache	24 MB	32 MB
L3 cache	256 MB	256 MB
Manufacturing process technology	7 nm	7 nm, 14 nm
Maximum frequency	3.4 GHz	3.4 GHz
Number of cores	48	64
Number of threads	96	128
Unlocked
Memory
ECC memory support
Max memory channels	8	8
Maximum memory bandwidth	190.7 GB/s	190.7 GB/s
Maximum memory size	4 TB	4 TB
Supported memory types	DDR4-3200	DDR4-3200
Compatibility
Max number of CPUs in a configuration	2	2
Sockets supported	SP3	SP3
Thermal Design Power (TDP)	225 Watt	225 Watt
Peripherals
Max number of PCIe lanes	128	128
PCI Express revision	4.0	4.0
PCIe configurations	x16, x8	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™)