AMD EPYC 7663 vs AMD EPYC 7643

Processor comparisons   25-03-2021
   Let's say you can't decide which CPU to buy, you can make a choice after reading the full tests AMD EPYC 7663 vs AMD EPYC 7643 and understand which is better for games or simple use for streaming, video editing, rendering, machine learning, programming. Here is useful information from real streaming and video editing tests or several benchmarks. A careful review of all the technical characteristics, to make it easier to read, is made by the table.
   From the video comparison, you can get the results of parallel examination in synthetic type tests like 3DMark, 7zip, RealBench, GeekBench 6, 5.2, Handbrake, PassMark, Blender, Gears 5, Dolphin Emulator, World of Tanks enCore Benchmark, Cinebench 23 (20, 15), SuperPi, VeraCrypt, MATLAB, PCMark 10, WPrime, Prime95, Blender, UserBenchmark, DaVinci Resolve Studio, Furmark, AIDA64.
   And how good the processors are in games:

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

After reading the results of all benchmarks and videos, you already be able to understand which CPU is better to buy for gaming AMD EPYC 7643 or AMD EPYC 7663.

Summary benchmark results

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

EPYC 7663

68%

EPYC 7643

66%

This shows the performance of the processors in single-threaded and multi-threaded mode. In this comparison, EPYC 7663 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 7663

76%

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

Gaming benchmark

Fortnite	135.1	123.8
Valorant	153.5	140.6
Cyberpunk 2077	86.0	78.8
Apex Legends	144.3	132.2
Call of Duty Warzone	115.1	105.5
Overwatch	124.3	113.9
Red Dead Redemption 2	105.9	97.0
DOOM Eternal	76.8	70.3
Warzone	119.7	109.7
Assassin's Creed	128.9	118.1
Valheim	127.4	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 that were in the comparisons not only did they have different amounts of RAM and different video cards. But users also tested them at different screen resolutions: 2K, FullHD or 4K. Therefore, the game benchmark data is approximate. But all video cards met the average system requirements of games. You will get more accurate information about how powerful the processor will be in games, if you compare it in one assembly with the video card that is installed in your computer.

Power consumption

EPYC 7663

12%

EPYC 7643

18%

To make a final choice 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 7663 as it consumes less power: 240W vs. 225W. Power consumption is particularly important for laptops. Also, when choosing a processor cooling system, you must know its TDP. 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 plan to use the processor not only for gaming, but also for programming, machine learning, video editing or video rendering, streaming, then the main parameter for you is its performance in multi-threaded mode. In this mode, to achieve maximum performance, the CPU includes all threads and cores that it has. You will find out this data from the benchmark tables below. Before using 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 7663	AMD EPYC 7643
Cinbench 15 Single-core	184	166
Cinbench 15 Multi-core	7606	6845
Cinbench 20 Single-core	347	312
Cinbench 20 Multi-core	16121	14509
Cinbench 23 Single-core	852	767
Cinbench 23 Multi-core	41920	37728

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

	AMD EPYC 7663	AMD EPYC 7643
Single-Core	1794	1615
Multi-Core	61492	55343

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

	AMD EPYC 7663	AMD EPYC 7643
Single-Core	874	1222
Multi-Core	46160	35055

Comparison of specifications

In the specification comparison table, the most helpful will be the release date of the processor and the possibility of overclocking it. The later the processor is released, the longer it will last in your computer. And the easier it will be to upgrade the system in the future. The same benefits from the presence of overclocking. When the processor can be overclocked, thereby increasing its performance, then it will continue to maintain maximum FPS in new games. Accordingly, you do not need to buy a new CPU to enjoy the games any longer. The savings are obvious!

	AMD EPYC 7663	AMD EPYC 7643
Announcement date	March 15, 2021	March 15, 2021
Type	Server	Server
Socket	SP3	SP3
Core name	Milan	Milan
Architecture	Zen 3	Zen 3
Generation	3	3
Turbo Frequency	3.5 MHz	3.6 MHz
Frequency	2 MHz	2.3 MHz
Cores	56	48
Threads	112	96
Bus rate
Bit	64	64
Lithography	7 nm	7 nm
Transistors count	78000 millions	76000 millions
Power consumption (TDP)	240 W	225 W
Memory type	DDR4	DDR4
Max. Memory
Memory Frequency	3200	3200
Memory bandwidth	204.8 GB/s	204.8 GB/s
L1 cache
L2 cache
L3 cache	256MB	256MB
Overclocking	No	No
Supports ECC	No	No
Part number	100-000000318 100-100000318WOF	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 13% better than EPYC 7663 in terms of CPU frequency. Another difference is that EPYC 7663 has 8 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 7663 is better: 23
The number of parameters for which AMD EPYC 7643 is better: 4
However, it should be understood that all the data in the text above do not mean that taking them into account you should completely trust a simple quantitative comparison. Be sure to watch the testing video and read the reviews of real owners of AMD EPYC 7663 and AMD EPYC 7643 before making a choice which of the processors to buy for gaming.

AMD EPYC 7663 - all data

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

• AMD EPYC 7663 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.