AMD Ryzen Threadripper Pro 9955WX

Manufacturer: AMD

The AMD Ryzen Threadripper Pro 9955WX is a high-performance desktop CPU designed for demanding workloads. It features a base clock speed of 16 x 4.5 GHz and a turbo clock speed of 5.4 GHz, offering robust processing power. With 32 threads, this processor is well-suited for professionals seeking performance and scalability in a single unit.

Equipped with 64 MB of L3 cache and supporting up to 2000GB of DDR5 memory across 8 channels, the Threadripper Pro 9955WX excels in memory-intensive tasks. It also boasts a thermal design power (TDP) of 350W and supports ECC memory, ensuring system stability for critical applications.

Pros

Supports up to 2000GB of DDR5 memory, enabling efficient handling of large datasets and demanding applications.
Has an unlocked multiplier, providing flexibility for overclocking and performance tuning.
Equipped with 8 memory channels, ensuring high bandwidth for improved system performance.
Supports ECC memory, enhancing data integrity and system stability for critical workloads.
Offers high turbo clock speed of 5.4 GHz, enabling faster processing for demanding tasks.

Cons

Does not include integrated graphics, requiring a dedicated GPU for visual output.
High thermal design power (TDP) of 350W may require advanced cooling solutions for optimal performance.
Maximum CPU temperature of 95°C could potentially limit thermal headroom for sustained heavy workloads.

Who is this for?

The AMD Ryzen Threadripper Pro 9955WX is well-suited for high-performance computing tasks, making it ideal for professionals working with large datasets or demanding applications. Its ability to support up to 2000GB of DDR5 memory and its 8 memory channels ensures smooth performance in environments that require intensive memory bandwidth. Additionally, the unlocked multiplier and high turbo clock speed of 5.4 GHz make it a good choice for users who require flexibility and high processing power, such as in rendering, simulation, or scientific computing.

Who is this NOT for?

This processor is not suitable for users who require integrated graphics, as it lacks integrated graphics and would require a dedicated GPU for display output. Its high thermal design power (TDP) of 350W also means it may not be the best choice for compact or low-power systems, as it demands significant cooling. Additionally, its maximum temperature of 95°C could limit sustained high-performance tasks in environments with inadequate cooling solutions.

General info:

Type	Desktop
Has integrated graphics	✕
release date	May 2025
Thermal Design Power (TDP)	350W
semiconductor size	4 nm
CPU temperature	95 °C
PCI Express (PCIe) version	5
Supports 64-bit	✓

The AMD Ryzen Threadripper Pro 9955WX is a desktop CPU that operates with a thermal design power (TDP) of 350W. It does not include integrated graphics, making it suitable for configurations relying on dedicated GPUs. Built on a 4 nm semiconductor, this processor supports PCIe 5.0 and 64-bit architecture, providing modern connectivity and efficiency. With a maximum CPU temperature of 95°C, it maintains stable operation under load.

Performance:

CPU speed	16 x 4.5 GHz
CPU threads	32 threads
turbo clock speed	5.4GHz
Has an unlocked multiplier	✓
L2 cache	16 MB
L3 cache	64 MB
L1 cache	1280 KB
L2 core	1 MB/core
L3 core	4 MB/core
Uses big.LITTLE technology	✕
clock multiplier	45

The AMD Ryzen Threadripper Pro 9955WX offers a strong performance profile with a base CPU speed of 16 x 4.5 GHz and a turbo clock speed of 5.4 GHz. Featuring 32 threads, this processor is designed for handling intensive workloads. It also has significant cache with 64 MB of L3 cache and 16 MB of L2 cache, providing efficient data handling for complex tasks. Additionally, it has an unlocked multiplier, allowing for greater overclocking flexibility.

Benchmarks:

PassMark result	69993
PassMark result (single)	4561

The AMD Ryzen Threadripper Pro 9955WX achieves a robust performance score with a PassMark result of 69,993, reflecting its strong processing capabilities. For single-threaded tasks, it scores 4,561 in the PassMark single benchmark, indicating solid performance in applications that rely on single-core speeds.

Integrated graphics:

Memory:

RAM speed (max)	6400 MHz
DDR memory version	5
memory channels	8
maximum memory amount	2000GB
Supports ECC memory	✓

The AMD Ryzen Threadripper Pro 9955WX supports a maximum RAM speed of 6400 MHz and utilizes DDR5 memory for fast data transfer. It features 8 memory channels, enabling efficient memory bandwidth and system performance. With a maximum memory capacity of 2000GB, this processor is capable of handling extremely large datasets, making it ideal for high-demand professional applications. Additionally, it supports ECC memory, ensuring data integrity in critical environments.

Features:

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

The AMD Ryzen Threadripper Pro 9955WX supports a range of advanced instruction sets including MMX, AVX, and AES, which enhance its ability to handle complex computing tasks. It utilizes multithreading, enabling improved parallel processing and more efficient multitasking. Additionally, it features the NX bit, offering enhanced security by preventing certain types of malicious software from executing.

Final Verdict

The AMD Ryzen Threadripper Pro 9955WX is a powerful desktop CPU designed for demanding professional environments. With its high turbo clock speed of 5.4 GHz and support for up to 2000GB of DDR5 memory across 8 channels, it excels in handling memory-intensive tasks and high-performance computing. While it lacks integrated graphics and requires advanced cooling solutions due to its 350W TDP, it remains a strong option for professionals who need extreme processing power and flexibility. This processor is ideal for users working with large datasets or complex workloads where performance and scalability are key priorities.