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AMD Ryzen Threadripper 3990X vs AMD EPYC 7643

Last updated: 2026-06-01

Table of Contents

Summary
Benchmarks
Specifications
User Reviews
Popular Comparisons

Summary

Benchmarks

Performance Overview
Average performance across multiple benchmarks

Single-core performance

Rank 2 - 95 %

AMD Ryzen Threadripper 3990X

Rank 1 - 100 %

AMD EPYC 7643

Multi-core performance

Rank 1 - 100 %

AMD Ryzen Threadripper 3990X

Rank 2 - 98 %

AMD EPYC 7643

Geekbench 6 Single-Core
Single-core performance

64C / 128T · 4.30 GHz

1,639

48C / 96T · 3.60 GHz

1,671

Geekbench 6 Multi-Core
Multi-core performance

64C / 128T · 3.20 GHz

15,832

48C / 96T · 3.40 GHz

14,987

Geekbench 5, 64bit Single-Core
Single-core performance

64C / 128T · 4.30 GHz

1,219

48C / 96T · 3.60 GHz

1,319

Geekbench 5, 64bit Multi-Core
Multi-core performance

64C / 128T · 3.20 GHz

34,670

48C / 96T · 3.40 GHz

36,850

More benchmarks

Cinebench 2024 (SC)
427 entries

Cinebench 2024 (MC)
422 entries

Cinebench R23 (SC)
690 entries

Cinebench R23 (MC)
665 entries

Geekbench 6 (SC)
1,989 entries

Geekbench 6 (MC)
1,927 entries

Cinebench R20 (SC)
666 entries

Geekbench 5 (SC)
2,512 entries

Cinebench R20 (MC)
615 entries

Geekbench 5 (MC)
2,483 entries

Blender 3.1 Benchmark
213 entries

PassMark CPU-Mark
2,504 entries

Blender 2.81 (bmw27)
190 entries

CPU-Z Benchmark 17 (MC)
751 entries

Monero Hashrate
94 entries

V-Ray CPU-Render
251 entries

Cinebench R15 (SC)
1,113 entries

Cinebench R15 (MC)
1,110 entries

Specifications

At a glance

Wischen	AMD Ryzen Threadripper 3990X	AMD EPYC 7643
Family	AMD Ryzen Threadripper (16)	AMD EPYC (147)
CPU group	AMD Ryzen Threadripper 3000 (3)	AMD EPYC 7003 (29)
Architecture	Castle Peak (Zen 2)	Milan (Zen 3)
Technology	7 nm	7 nm
Segment	Desktop	Server
Socket	TRX4 (sTRX4)	SP3
Predecessor	AMD Ryzen Threadripper 2990WX	AMD EPYC 7642
Successor

CPU Cores and Base Frequency

Wischen	AMD Ryzen Threadripper 3990X	AMD EPYC 7643
CPU Cores / Threads	64 / 128	48 / 96
Hyperthreading / SMT	✓	✓
Core architecture	normal	normal
Cores:	64x	48x Zen 3
Frequency:	2.90 GHz	2.30 GHz
Turbo (1 Core):	4.30 GHz	3.60 GHz
Turbo (All Cores):	3.20 GHz	3.40 GHz
L2-Cache	32.00 MB
L3-Cache	256.00 MB	256.00 MB
Overclocking	✓	✗

Integrated graphics (iGPU)

Wischen	AMD Ryzen Threadripper 3990X	AMD EPYC 7643
GPU name	no iGPU	no iGPU
GPU frequency
CUs / Shader	/	/
Raytracing	✗	✗
Max. displays
Max. GPU Memory
Technology
Release date

NPU AI performance

Wischen	AMD Ryzen Threadripper 3990X	AMD EPYC 7643
AI hardware
AI specifications
NPU + CPU + iGPU

Memory & PCIe

Wischen	AMD Ryzen Threadripper 3990X	AMD EPYC 7643
Memory	DDR4-3200 (51.2 GB/s)	DDR4-3200 (204.8 GB/s)
Max. Memory	2048 GB	4096 GB
Memory channels	4	8
ECC	Yes	Yes
PCIe	4.0 x 64	4.0 x 128
PCIe Bandwidth	126.0 GB/s	252.0 GB/s

Thermal Management

Wischen	AMD Ryzen Threadripper 3990X	AMD EPYC 7643
TDP	280 W	240 W
TDP (PL2)
TDP up
TDP down		225 W
T. junction max.	95 °C

Technical details

Wischen	AMD Ryzen Threadripper 3990X	AMD EPYC 7643
Chip design	Chiplet	Chiplet
AES-NI	✓	✓
Operating systems	Windows 10, Windows 11, Linux	Windows 10, Linux
Instruction set	x86-64 (64 bit)	x86-64 (64 bit)
ISA extensions	SSE4a, SSE4.1, SSE4.2, AVX2, FMA3	SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
Release date	Q1/2020	Q1/2021
Release price	3990 $	4995 $
Documents	Technical data sheet	Technical data sheet

User Reviews

Your rating

Here you can rate one or both of the processors. The average rating of AMD Ryzen Threadripper 3990X is 4.6 stars (12 ratings), while AMD EPYC 7643 has received 5.0 stars (1 ratings).

Click on the stars to rate one or both processors.

AMD Ryzen Threadripper 3990X
64C / 128T · 2.90 - 4.30 GHz

★★★★★

AMD EPYC 7643
48C / 96T · 2.30 - 3.60 GHz

★★★★★