AMD Ryzen 9 3900X vs Ryzen 7 5800X3D
48
out of 100
VS
52
out of 100
We compared two desktop CPUs: the 3.8 GHz AMD Ryzen 9 3900X with 12-cores against the 3.4 GHz Ryzen 7 5800X3D with 8-cores. On this page, you'll find out which processor has better performance in benchmarks, games and other useful information.
Review
Single-Core Performance
Performance in single-threaded apps and benchmarks
Multi-Core Performance
Measure performance when all cores are involved
Power Efficiency
The efficiency score of power consumption
The "iGPU" and "Power Efficiency" have a minor impact on the NanoReview Score for desktop CPU.
Choose your main usage scenario to recalculate the Final Score and see which CPU suits your needs.
Value for money (Beta)
Key Differences
Advantages of AMD Ryzen 9 3900X
- Unlocked multiplier
- Has 4 more physical cores
- 2% higher Turbo Boost frequency (4.6 GHz vs 4.5 GHz)
Advantages of AMD Ryzen 7 5800X3D
- Newer - released 2 years and 9 months later
- Has 32 MB larger L3 cache size, helping fully utilize a high-end GPU in gaming
- 24% faster in a single-core Geekbench v6 test - 2113 vs 1699 points
- Around 3.52 GB/s (7%) higher theoretical memory bandwidth
Test in Benchmarks
Comparing the performance of CPUs across various tasksCinebench
Cinebench 2024 (Single)
Cinebench 2024 (Multi)
Cinebench Scores (#159th place)
GeekBench v6
Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
| File compression | 872.1 MB/sec | 1240 MB/sec |
| Clang compilation | 104.4 Klines/sec | 80.7 Klines/sec |
| HTML 5 Browser | 209.4 pages/sec | 227.7 pages/sec |
| PDF Renderer | 299.9 Mpixels/sec | 316.9 Mpixels/sec |
| Text processing | 144.4 pages/sec | 205.9 pages/sec |
| Background blur | 41.1 images/sec | 54.7 images/sec |
| Photo processing | 75.2 images/sec | 81.4 images/sec |
| Ray tracing | 24.4 Mpixels/sec | 19.9 Mpixels/sec |
PassMark
Passmark CPU (Single-Core)
Passmark CPU (Multi-Core)
| Integer math | 99.4 GOps/sec | 88.2 GOps/sec |
| Floating point math | 58.4 GOps/sec | 50.1 GOps/sec |
| Find prime numbers | 213M Primes/sec | 230M Primes/sec |
| Random string sorting | 48.2M Strings/sec | 33.8M Strings/sec |
| Data encryption | 28.6 GBytes/sec | 20.2 GBytes/sec |
| Data compression | 448.8 MBytes/sec | 329.4 MBytes/sec |
| Physics | 1782 Frames/sec | 2875 Frames/sec |
| Extended instructions | 29.2B Matrices/sec | 22.6B Matrices/sec |
Blender
Blender CPU
Performance Per Watt
| Cinebench 2024 / Watt | 9.4 PPW | 7.9 PPW |
| Geekbench 6 Multi / Watt | 99.7 PPW | 106.6 PPW |
| Passmark CPU Mark / Watt | 309.4 PPW | 269.4 PPW |
| Blender / Watt | 2.66 PPW | 2.02 PPW |
These are rough calculations, as most CPUs surpass PL1 TDP wattage even in multicore workloads.
Recent User Tests
AMD Ryzen 9 3900X
| Date | Benchmark | Result |
|---|---|---|
| π 2026-03-08 (Heliosgt) | Cinebench 2024 | 76 / 1081 |
| π 2026-02-11 (Ethan) | Cinebench 2024 | 69 / 778 |
| π 2026-01-30 (Amara) | Cinebench 2024 | 75 / 986 |
| π 2025-11-16 (LegendryDrifter) | GeekBench | 1821 / 11106 |
| π 2025-11-16 (LegendryDrifter) | Cinebench 2024 | 79 / 1054 |
AMD Ryzen 7 5800X3D
| Date | Benchmark | Result |
|---|---|---|
| π 2026-01-29 (3Dawe) | Cinebench 2024 | 92 / 858 |
| π 2025-12-30 -> vermilixn | Cinebench 2024 | 94 / 911 |
| π 2025-12-30 (vermilixn) | Cinebench 2024 | 94 / 911 |
| π 2025-11-02 (Homer35) | Cinebench 2024 | 94 / 901 |
| π 2025-10-24 (masuzo) | Cinebench 2024 | 90 / 808 |
Specifications
Full technical specification of AMD Ryzen 9 3900X and Ryzen 7 5800X3DGeneral
| Vendor | Amd | Amd |
| Released | July 7, 2019 | March 15, 2022 |
| Type | Desktop | Desktop |
| Instruction Set | x86-64 | x86-64 |
| Codename | - | Zen 3 (Vermeer) |
| Integrated GPU | No | No |
| Rival Equivalent | - Intel Core i9 9900K | - Intel Core i7 12700K |
| Successor | - AMD Ryzen 9 9900X | - AMD Ryzen 7 9800X3D |
AMD Ryzen CPU ranking (126th and 103rd place)
CPU
| P-Cores | 12 | 8 |
| P-Threads | 24 | 16 |
| Base Frequency (P) | 3.8 GHz | 3.4 GHz |
| Turbo Boost Frequency (P) | 4.6 GHz | 4.5 GHz |
| Total Cores | 12 | 8 |
| Total Threads | 24 | 16 |
| Bus Frequency | 100 MHz | 100 MHz |
| Multiplier | 38x | 34x |
| L1 Cache | 64K (per core) | 64K (per core) |
| L2 Cache | 512K (per core) | 512K (per core) |
| L3 Cache | 64MB (shared) | 96MB (shared) |
| Unlocked Multiplier | Yes | No |
Package
| Transistors | 3.8 billions | - |
| Fabrication Process | 7 nm | 7 nm |
| TDP (PL1) | 105 W | 105 W |
| Socket | AM4 | AM4 |
| Peak Temperature | 95Β°C | 90Β°C |
Desktop CPU ranking (121st and 101st place)
Memory Support
| Memory Types | - DDR4-3200 | - DDR4-3200 - DDR4-2933 - DDR4-2667 |
| Max. Memory Size | 128 GB | 128 GB |
| Memory Channels | 2 | 2 |
| Max. Memory Bandwidth | 47.68 GB/s | 51.2 GB/s |
| ECC Support | Yes | Yes |
Misc
| Official Site | AMD Ryzen 9 3900X official page | AMD Ryzen 7 5800X3D official page |
| PCI Express Version | 4.0 | 4.0 |
| PCI Express Lanes | 16 | 20 |
Cast your vote
Total votes: 238