AMD Ryzen 9 Pro 9945

Manufacturer: AMD

The AMD Ryzen 9 Pro 9945 is a high-performance desktop CPU designed for professional and intensive workloads. With 24 threads and a base clock speed of 3.4 GHz, this processor is built to handle demanding applications with ease. Its 64 MB of L3 cache ensures efficient data processing, contributing to smoother multitasking and faster execution.

In terms of specifications, the Ryzen 9 Pro 9945 supports DDR5 RAM with speeds up to 5600 MHz and features integrated graphics. Its thermal design power (TDP) is set at 65W, and it is compatible with AM5 sockets and various chipsets such as X670 and B650. The CPU also supports ECC memory, offering additional reliability for mission-critical tasks.

Pros

Supports up to 192GB of RAM, offering plenty of memory for heavy workloads and multitasking.
Equipped with integrated graphics, providing basic visual performance without the need for a dedicated GPU.
Compatible with the latest DDR5 memory, allowing for high-speed data access and future-proofing your system.
Has support for ECC memory, enhancing data integrity and reliability for mission-critical applications.
Uses multithreading to handle multiple tasks simultaneously, improving efficiency in demanding applications.

Cons

Does not feature an unlocked multiplier, limiting overclocking potential for users looking to push the CPU's limits.
Does not use big.LITTLE technology, which could have improved power efficiency by using different core types for light and heavy tasks.

Who is this for?

The AMD Ryzen 9 Pro 9945 is well-suited for professionals and power users who require strong multi-tasking capabilities and high memory bandwidth. With support for up to 192GB of RAM and ECC memory, it is ideal for memory-intensive applications and workloads that demand data integrity. The CPU's ability to handle multithreading also makes it a good choice for users running complex simulations, video editing software, or virtualization environments.

Who is this NOT for?

This processor is not ideal for users looking to push performance limits through overclocking, as it does not have an unlocked multiplier. Additionally, its lack of big.LITTLE technology means it may not be as power-efficient during lighter tasks, making it less suitable for portable systems or energy-sensitive applications.

General info:

Type	Desktop
CPU socket	AM5
chipset	X670, B650, X870, B840, B850
Has integrated graphics	✓
release date	September 2025
Thermal Design Power (TDP)	65W
semiconductor size	4 nm
CPU temperature	95 °C
PCI Express (PCIe) version	5
Supports 64-bit	✓

The AMD Ryzen 9 Pro 9945 is a desktop CPU that features a 4 nm semiconductor size and a 65W thermal design power (TDP), making it an efficient and powerful option for various tasks. It supports the AM5 socket and is compatible with a wide range of chipsets, including X670, B650, X870, B840, and B850. The CPU also includes integrated graphics, providing a balance of performance and visual capabilities. Additionally, it supports PCI Express 5.0 and 64-bit processing, ensuring modern connectivity and computing performance.

Performance:

CPU speed	12 x 3.4 GHz
CPU threads	24 threads
turbo clock speed	5.4GHz
Has an unlocked multiplier	✕
L2 cache	12 MB
L3 cache	64 MB
L1 cache	960 KB
L2 core	1 MB/core
L3 core	5.33 MB/core
Uses big.LITTLE technology	✕
clock multiplier	34

The AMD Ryzen 9 Pro 9945 offers a solid performance profile with a base clock speed of 3.4 GHz across 12 cores, providing a strong foundation for multitasking and demanding applications. It can reach a turbo clock speed of up to 5.4 GHz when needed, ensuring high performance during peak workloads. The CPU also features a significant amount of cache memory, including 12 MB of L2 cache and 64 MB of L3 cache, which helps to improve data access speeds and overall system responsiveness.

Benchmarks:

PassMark result	50113
PassMark result (single)	4623

The AMD Ryzen 9 Pro 9945 achieves a robust performance score with a PassMark result of 50113, showcasing its ability to handle a variety of tasks effectively. For single-threaded performance, it scores 4623 in PassMark single-core tests, highlighting its strong performance in applications that rely on individual core speeds.

Integrated graphics:

GPU turbo	2200 MHz

The AMD Ryzen 9 Pro 9945 includes integrated graphics with a GPU turbo speed of 2200 MHz, providing a decent level of visual performance for tasks that don't require a dedicated GPU. This enables smooth display output for everyday tasks, light gaming, and media consumption without the need for a separate graphics card.

Memory:

RAM speed (max)	5600 MHz
DDR memory version	5
memory channels	2
maximum memory amount	192GB
Supports ECC memory	✓

The AMD Ryzen 9 Pro 9945 supports high-performance memory with a maximum RAM speed of 5600 MHz and is compatible with DDR5 memory. It features two memory channels and can accommodate up to 192GB of RAM, making it suitable for intensive workloads. Additionally, this processor supports ECC memory, offering added reliability for error-sensitive applications.

Features:

instruction sets	MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
uses multithreading	✓
Has NX bit	✓

The AMD Ryzen 9 Pro 9945 is equipped with a variety of advanced features, including support for multiple instruction sets such as MMX, AVX2, and AES, optimizing its performance across different applications. It also utilizes multithreading, allowing for better handling of simultaneous tasks. Additionally, the processor has an NX bit for enhanced security, protecting against certain types of malicious software.

Final Verdict

The AMD Ryzen 9 Pro 9945 is a powerful desktop CPU designed for professionals and power users who need robust multi-threading capabilities and reliable memory support. With its impressive 64MB of L3 cache and the ability to handle up to 192GB of RAM, it excels in memory-intensive tasks and demanding workloads. While it lacks features like an unlocked multiplier for overclocking and big.LITTLE technology for power efficiency, it remains a solid choice for high-performance applications that prioritize stability and reliability. Overall, the Ryzen 9 Pro 9945 is a strong option for users needing exceptional processing power for professional environments.