CPUs compared

AMD Ryzen 7 9850X3D vs AMD Ryzen 9 9900X

  • Both launched at $499.
  • Same socket (AM5): both fit the same motherboards, BIOS permitting.
  • The AMD Ryzen 9 9900X has 4 more cores (12 vs 8).
AMD

AMD Ryzen 7 9850X3D

8 cores · 5.6 GHz · AM5 · DDR5-5600

Launched at $499

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AMD

AMD Ryzen 9 9900X

12 cores · 5.6 GHz · AM5 · DDR5-5600

Launched at $499

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Specs side by side

3 of 10 differ, marked. Speed isn't compared here: we only list specs we can source.

SpecAMD Ryzen 7 9850X3DAMD Ryzen 9 9900X
Cores8 cores, 16 threads12 cores, 24 threads
Boost clockUp to 5.6 GHzUp to 5.6 GHz
L3 cache96 MB64 MB
Power (TDP)120 W120 W
Built-in graphicsYesYes
SocketAM5AM5
PCIePCIe 5.0PCIe 5.0
Official DDR5 speedDDR5-5600 (DDR5-3600 with 4 modules)DDR5-5600 (DDR5-3600 with 4 modules)
SegmentDesktopDesktop
LaunchedJanuary 29, 2026August 15, 2024

Which motherboards take them

AMD Ryzen 7 9850X3D

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 9850X3D

  1. Wikipedia: List of AMD Ryzen processors · CC BY-SA 4.0

AMD Ryzen 9 9900X

  1. 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.