AMD EPYC 7742 vs AMD EPYC 7643

Processor comparisons 27-03-2023

   For example you can't decide which CPU to buy, you can make a choice by looking at the AMD EPYC 7742 vs AMD EPYC 7643 tests and understand which is better for games or simple use for streaming, programming, rendering, video editing, machine learning. Here is all information from real video editing and streaming tests or various benchmarks. A careful analysis of all the technical characteristics, to make it easier to read, is presented in the form of the table.
   From the comparison video, you can get the results of joint testing in software tests like Cinebench 23 (20, 15), Gears 5, Blender, Prime95, PassMark, AIDA64, Dolphin Emulator, RealBench, 7zip, WPrime, Blender, GeekBench 6, 5.2, 3DMark, UserBenchmark, DaVinci Resolve Studio, SuperPi, VeraCrypt, World of Tanks enCore Benchmark, Handbrake, PCMark 10, MATLAB, Furmark.
   And how good the CPUs are in games:

Call of Duty: Warzone and Modern Warfare
Apex Legends
Red Dead Redemption 2
Grand Theft Auto V
Halo Infinite
Death Stranding
Fortnite
Valheim
Watch Dogs Legion
Overwatch
Assassin's Creed Valhalla
DOOM: Eternal
Borderlands 3
Last Man Standing
Fallout 76
Valorant
Cyberpunk 2077
World of Warcraft: Shadowlands
Rainbow Six Siege

After reading the results of all benchmarks and videos, you already be able to know which processor is better to buy for gaming AMD EPYC 7643 or AMD EPYC 7742.

Summary benchmark results

As a percentage of the maximum value based on a sample from the entire base of all processors
Processor Benchmark

EPYC 7742

70%

EPYC 7643

66%

This parameter shows the performance of the processors in single-threaded and multi-threaded mode. In this comparison, EPYC 7742 is 5% better than EPYC 7643. The data source is several popular tests. More detailed information of the benchmarks is below.

Gaming performance
Summary result of all game benchmarks.

EPYC 7742

78%

EPYC 7643

70%

For the maximum in this test, the results of the most powerful processor in the site database are taken. And of course, this is a server processor, on which no one will run games. Because the cost of this processor reaches several tens of thousands of dollars. Therefore, if you think that the selected CPU has a little game result, look at the FPS that it produces in real games in the final table below.
List of other games in which CPU comparisons were performed: Battlefield V, Ghostrunner, Half-Life: Alyx, NBA 2K20, Resident Evil 7 Biohazard, Microsoft Flight Simulator, PlayerUnknown's Battlegrounds (PUBG), Control, Counter-Strike: Global Offensive (CS GO), The Witcher 3: Wild Hunt, DOTA 2A, Monster Hunter World, Metro Exodus, Shadow of the Tomb Raider, Hitman 3, Forza Horizon 4, Horizon Zero Dawn, League of Legends (LOL).

Gaming benchmark

Fortnite	137.6	123.8
Valorant	156.4	140.6
Cyberpunk 2077	87.6	78.8
Apex Legends	147.0	132.2
Call of Duty Warzone	117.3	105.5
Overwatch	126.7	113.9
Red Dead Redemption 2	107.9	97.0
DOOM Eternal	78.2	70.3
Warzone	122.0	109.7
Assassin's Creed	131.3	118.1
Valheim	129.8	116.7

The numbers in this table indicate the maximum FPS that was received on the device with the corresponding processor. Depending on the configuration of the computer (RAM size and Video Card) and graphics quality settings (Ultra, Medium, Normal), the results may differ quite significantly. We recommend that you better study the results of the Cinebench, GeekBench and Passmark becnmarks.
The computers participating in the comparisons not only were the equipped with different amounts of RAM and different video cards. But users also tested them at different screen resolutions: 4K, 2K or FullHD. Therefore, the game benchmark data is approximate. But all video cards met the average system requirements of games. To be sure exactly how much performance the processor will be in games, if you get acquainted with the benchmarks that are made with the same video card that is installed in your computer.

Power consumption

EPYC 7742

16%

EPYC 7643

18%

To make a final decision on which processor is better, you should also consider the generation of its core. The newer the processor generation, the better its performance in games and benchmarks, as well as its energy efficiency. In this case the EPYC 7643 is more energy efficient than the EPYC 7742 as it consumes less power: 225W vs. 225W. Power consumption is especially important for laptops. And TDP should be taken into account when choosing a processor cooling system. It is necessary to calculate so that the TDP data specified in the cooler specification is greater than the TDP of the compared processor.

Software benchmarks

Let's say you want to use the processor not only for gaming, but also for programming, streaming, machine learning, video editing or video rendering, then the main parameter for you is its performance in multi-threaded mode. In this mode, to reach maximum efficiency, the CPU turns on all threads and cores that it has. You will learn this data from the benchmark tables below. Before you take into account the data from these tests, be sure to check whether the software you are going to use on your computer supports multi-threaded mode. Since there are still many programs that use only one core to run, and all the advantages of multi-core mode are unused.

Cinebench 23, 20 an 15
The results of this benchmark show Single-threaded and Multi-threaded CPU performance

	AMD EPYC 7742	AMD EPYC 7643
Cinbench 15 Single-core	202	166
Cinbench 15 Multi-core	8334	6845
Cinbench 20 Single-core	398	312
Cinbench 20 Multi-core	20644	14509
Cinbench 23 Single-core	933	767
Cinbench 23 Multi-core	45938	37728

Passmark
This popular benchmark displays Multi-threaded and Single-threaded processor performance

	AMD EPYC 7742	AMD EPYC 7643
Single-Core	2352	1615
Multi-Core	67386	55343

GeekBench 6, 5.2
This benchmark shows Multi-threaded and Single-threaded processor performance

	AMD EPYC 7742	AMD EPYC 7643
Single-Core	1091	1222
Multi-Core	48624	35055

Comparison of specifications

In the specification comparison table, the most useful will be the the possibility of overclocking it and release date of the processor. The later the processor is released, the longer it will last you. And the easier it will be to upgrade the system later. The same benefits from the presence of overclocking. If the processor can be overclocked, increasing its performance, then it will still be able to produce maximum FPS even in new games. It turns out that there is no longer a need to buy a new CPU to enjoy the games any longer. The savings are obvious!

	AMD EPYC 7742	AMD EPYC 7643
Announcement date	April 01, 2019	March 15, 2021
Type	Server	Server
Socket	SP3	SP3
Core name	Rome	Milan
Architecture	Zen 2	Zen 3
Generation	2	3
Turbo Frequency	3.4 MHz	3.6 MHz
Frequency	2.25 MHz	2.3 MHz
Cores	64	48
Threads	128	96
Bus rate
Bit	64	64
Lithography	7 nm	7 nm
Transistors count	86000 millions	76000 millions
Power consumption (TDP)	225 W	225 W
Memory type	DDR4	DDR4
Max. Memory
Memory Frequency		3200
Memory bandwidth		204.8 GB/s
L1 cache
L2 cache
L3 cache	256MB	256MB
Overclocking	No	No
Supports ECC	No	No
Part number	100-000000053 100-100000053WOF	100-000000326 100-100000326WOF

In this comparison block, you should pay attention to the differences in clock speed and the number of cores. Here EPYC 7643 is 2% better than EPYC 7742 in terms of CPU frequency. Another difference is that EPYC 7742 has 16 more core than EPYC 7643. Also keep in mind that high CPU frequency affects battery life through power consumption (relevant for laptops).

Result:
The number of parameters for which AMD EPYC 7742 is better: 23
The number of parameters for which AMD EPYC 7643 is better: 7
However, it should be understood that all the number in the text above do not mean that taking them into account you should completely trust a simple comparison of these numbers. Be sure to watch benchmarks video and read the reviews of real owners of AMD EPYC 7742 and AMD EPYC 7643 before making a selection which CPU to buy for gaming and which not.

AMD EPYC 7742 - all data

• Cinebench r15 score
• Cinebench r20 score
• Cinebench r23 score
• GeekBench 6, 5.2 score

• AMD EPYC 7742 specs and review.

AMD EPYC 7643 - all data

• Cinebench r15 score
• Cinebench r20 score
• Cinebench r23 score
• GeekBench 6, 5.2 score

• AMD EPYC 7643 specs and review.