AMD EPYC 7642 vs AMD EPYC 7643

Processor comparisons 19-03-2023

   If you can't decide which processor to buy, you can make a choice by looking at the AMD EPYC 7642 vs AMD EPYC 7643 tests and decide which is better for games or normal use for programming, machine learning, rendering, streaming, video editing. Here is useful information from many benchmarks or real video editing and streaming tests. A step-by-step analysis of all the specifications, to make it easier to understand, is summarized in the table.
   From the video comparison, you can get the results of joint testing in special testing software like DaVinci Resolve Studio, AIDA64, PCMark 10, WPrime, Cinebench 23 (20, 15), Blender, Blender, Handbrake, SuperPi, 3DMark, MATLAB, PassMark, GeekBench 6, 5.2, World of Tanks enCore Benchmark, UserBenchmark, Dolphin Emulator, 7zip, Gears 5, VeraCrypt, Furmark, Prime95, RealBench.
   And how good the CPUs are in games:

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

After looking at the data of all benchmarks and videos, you can already make an briefed decision about which processor is better to buy for gaming AMD EPYC 7643 or AMD EPYC 7642.

Summary benchmark results

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

EPYC 7642

68%

EPYC 7643

66%

This value shows the performance of the processors in single-threaded and multi-threaded mode. In this comparison, EPYC 7642 is 2% better than EPYC 7643. The data source is several popular tests. Detailed information can be found below.

Gaming performance
Summary result of all game benchmarks.

EPYC 7642

73%

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 this processor costs several tens of thousands of dollars. And if it seems to you that the selected CPU has a small game result, look at the FPS that it produces in real games in the final table below.
List of less popular games in which processors were compared: Hitman 3, The Witcher 3: Wild Hunt, Metro Exodus, Forza Horizon 4, Battlefield V, Half-Life: Alyx, PlayerUnknown's Battlegrounds (PUBG), Ghostrunner, Counter-Strike: Global Offensive (CS GO), Microsoft Flight Simulator, Resident Evil 7 Biohazard, Shadow of the Tomb Raider, Control, DOTA 2A, League of Legends (LOL), Monster Hunter World, Horizon Zero Dawn, NBA 2K20.

Gaming benchmark

Fortnite	129.7	123.8
Valorant	147.3	140.6
Cyberpunk 2077	82.5	78.8
Apex Legends	138.5	132.2
Call of Duty Warzone	110.5	105.5
Overwatch	119.3	113.9
Red Dead Redemption 2	101.7	97.0
DOOM Eternal	73.7	70.3
Warzone	114.9	109.7
Assassin's Creed	123.8	118.1
Valheim	122.3	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 tested computers not only did they have different video cards and different amounts of RAM. But users also tested them at different screen resolutions: FullHD, 2K or 4K. 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 7642

13%

EPYC 7643

18%

To make a finishing resolution on which processor is better, you should also consider the generation of its core. It is clear that the newer the generation, the better the performance of the processor in games and benchmarks, as well as its energy efficiency. In this case the EPYC 7643 is more energy efficient than the EPYC 7642 since it has less power consumption: 225W vs. 225W. Power consumption is especially important for laptops. And TDP should be taken into account when choosing a processor cooling system. You need to buy a cooler that has the TDP data specified in the specification was greater than the TDP of the compared processor.

Software benchmarks

If you want to use the processor not only for gaming, but also for programming, video rendering or video editing, machine learning, streaming, then first of all you need to pay attention to the performance in multi-threaded mode. In this mode, to reach maximum efficiency, the processor uses 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 work, and all the benefit of multi-core mode turns out to be unnecessary.

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

	AMD EPYC 7642	AMD EPYC 7643
Cinbench 15 Single-core	177	166
Cinbench 15 Multi-core	7594	6845
Cinbench 20 Single-core	443	312
Cinbench 20 Multi-core	16104	14509
Cinbench 23 Single-core	844	767
Cinbench 23 Multi-core	41890	37728

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

	AMD EPYC 7642	AMD EPYC 7643
Single-Core	2404	1615
Multi-Core	61546	55343

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

	AMD EPYC 7642	AMD EPYC 7643
Single-Core	918	1222
Multi-Core	40836	35055

Comparison of specifications

In the specification comparison table, the processor release date and overclocking capability will be the most helpful. The newer the processor, the longer it will last in your computer. And the easier it will be to upgrade the system later. The same can be said about overclocking. When the processor can be overclocked, increasing its performance, then it will still be able to produce maximum FPS in new games. Accordingly, there is no longer a need to buy a new CPU to enjoy the games any longer. The economy are obvious!

	AMD EPYC 7642	AMD EPYC 7643
Announcement date	October 01, 2020	March 15, 2021
Type	Server	Server
Socket	SP3	SP3
Core name	Rome	Milan
Architecture	Zen 2	Zen 3
Generation	2	3
Turbo Frequency	3.3 MHz	3.6 MHz
Frequency	2.3 MHz	2.3 MHz
Cores	48	48
Threads	96	96
Bus rate
Bit	64	64
Lithography	7 nm	7 nm
Transistors count	64000 millions	76000 millions
Power consumption (TDP)	225 W	225 W
Memory type	DDR4	DDR4
Max. Memory
Memory Frequency	3200	3200
Memory bandwidth	208 GByte/s	204.8 GB/s
L1 cache
L2 cache
L3 cache	256MB	256MB
Overclocking	No	No
Supports ECC	No	No
Part number	100-000000074 100-100000074WOF	100-000000326 100-100000326WOF

In this comparison block, you should pay attention to the differences in clock speed and the number of cores. 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 7642 is better: 21
The number of parameters for which AMD EPYC 7643 is better: 5
All the figures in the article above do not mean that you should be guided entirely by them and trust a simple comparison of these numbers. Better to watch the video tests and read the opinion of real owners of AMD EPYC 7642 and AMD EPYC 7643 before deciding which CPU to buy for gaming and which not.

AMD EPYC 7642 - all data

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

• AMD EPYC 7642 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.