AMD Ryzen 7 9800X3D vs AMD Ryzen 9 9900X
- The AMD Ryzen 7 9800X3D launched $20 lower ($479 vs $499).
- Same socket (AM5): both fit the same motherboards, BIOS permitting.
- The AMD Ryzen 9 9900X has 4 more cores (12 vs 8).
AMD Ryzen 7 9800X3D
8 cores · 5.2 GHz · AM5 · DDR5-5600
Launched at $479
AMD Ryzen 9 9900X
12 cores · 5.6 GHz · AM5 · DDR5-5600
Launched at $499
Specs side by side
4 of 10 differ, marked. Speed isn't compared here: we only list specs we can source.
| Spec | AMD Ryzen 7 9800X3D | AMD Ryzen 9 9900X |
|---|---|---|
| Cores | 8 cores, 16 threads | 12 cores, 24 threads |
| Boost clock | Up to 5.2 GHz | Up to 5.6 GHz |
| L3 cache | 96 MB | 64 MB |
| Power (TDP) | 120 W | 120 W |
| Built-in graphics | Yes | Yes |
| Socket | AM5 | AM5 |
| PCIe | PCIe 5.0 | PCIe 5.0 |
| Official DDR5 speed | DDR5-5600 (DDR5-3600 with 4 modules) | DDR5-5600 (DDR5-3600 with 4 modules) |
| Segment | Desktop | Desktop |
| Launched | November 7, 2024 | August 15, 2024 |
Which motherboards take them
AMD Ryzen 7 9800X3D
AM5 boards with these chipsets:
- X870E
- X870
- B850
- B840
- X670E
- X670
- A620
- A620A
- B650E
- B650
AMD Ryzen 9 9900X
AM5 boards with these chipsets:
- X870E
- X870
- B850
- B840
- X670E
- X670
- A620
- A620A
- B650E
- B650
Sources
AMD Ryzen 7 9800X3D
- Wikipedia: List of AMD Ryzen processors · CC BY-SA 4.0
AMD Ryzen 9 9900X
- Wikipedia: List of AMD Ryzen processors · CC BY-SA 4.0
Specs last checked Oct 19, 2026. Spotted a mistake? Tell us and we'll fix it.