CPUDesktopReleased Sep 16, 2025

AMD Ryzen 9 PRO 9945

12C/24T · 5.4 GHz · 65 W

The Ryzen 9 PRO 9945 is the 12-core flagship of the first Ryzen PRO 9000 business desktop processors, launched on September 16, 2025 for OEM systems. Unlike the 120 W Ryzen 9 9900X, it runs at a 65 W TDP with a locked multiplier, using two six-core Zen 5 CCDs with 64 MB of L3 cache, and ships with a Wraith Stealth cooler. AMD PRO technologies add remote manageability, Memory Guard memory encryption and other enterprise security features.

General

Manufacturer: AMD
Model: AMD Ryzen 9 PRO 9945
Segment: Desktop
Generation: Ryzen 9000
Codename: Granite Ridge
Architecture: x86_64
Microarchitecture: Zen 5
Release date: Sep 16, 2025
Price: Search on Amazon

Cores & clocks

Cores / threads: 12 cores / 24 threads
Base clock: 3.40 GHz
Boost clock: 5.40 GHz
TDP (design W): 65 W
Unlocked: ✕ No
L2 cache: 12 MB
L3 cache: 64 MB
Technology (nm): 4 nm
TSMC N4P (CCD) + N6 (IOD)

Platform

Socket: AM5
2-CPU (multi-socket): ✕ No
Integrated GPU: Radeon Graphics (2 CU RDNA 2)
Clock: 2,200 MHz
Memory type: DDR5-5600
2-channel
Memory size: Up to 192 GB
ECC memory: ✓ Yes
PCIe: PCIe 5.0

Instructions & AI

Instruction extensions: x86-64MMX-plusSSESSE2SSE3SSSE3SSE4.1SSE4.2SSE4AAVXAVX2AVX512FMA3AESSHAAMD-V
NPU: None

OS support

Windows: Windows 10Windows 11 24H2Windows 11 25H2Windows 11 26H2
Linux: UbuntuFedoraArch Linux
Notes: AMD officially lists Windows 11 (64-bit), Windows 10 (64-bit), RHEL x86 64-bit and Ubuntu x86 64-bit. The Ryzen 9000 series is on Microsoft's Windows 11 24H2 and 25H2 supported-processor lists; 26H2 keeps the 25H2 requirements. Other mainstream x86-64 distributions such as Fedora and Arch run without special support.