AMD · Threadripper PRO · 2025 · sTR5
The AMD TR PRO 9955WX is a desktop processor with 16 cores, released in 2025 at an MSRP of $2,499. It is part of the Threadripper PRO lineup, using the TR PRO 9000 platform, and fits the sTR5 socket. Internally, it is built on the "Zen 5" architecture. Thanks to AMD Simultaneous Multi-Threading (SMT), each core can handle two instruction streams simultaneously, yielding a total of 32 threads for improved parallelism. The TR PRO 9955WX has a base clock of 4.5 GHz and can boost up to 5.4 GHz depending on workload and thermal headroom. AMD manufactures the "Zen 5" silicon on a TSMC 4nm process node. The multiplier is unlocked, making overclocking straightforward. This processor supports DDR5 memory. ECC memory is supported, provided the motherboard enables it. With a TDP of 350W, the TR PRO 9955WX runs hot and requires a capable cooling setup. This processor has no integrated graphics — a discrete GPU is required. The cache hierarchy consists of 64KB/core of L1, 16MB of L2, and 64MB of L3 cache — an unusually large L3 that greatly benefits latency-sensitive workloads like gaming.
16-core Zen 5 PRO. Highest base clock in the TR PRO 9000 lineup at 4.5 GHz.
| Brand | AMD |
|---|---|
| Family | Threadripper PRO |
| Series | TR PRO 9000 |
| Architecture | Zen 5 |
| Type | Desktop |
| Launch year | 2025 |
| Cores | 16 |
| Threads | 32 |
| Base clock | 4.5 GHz |
| Boost clock | 5.4 GHz |
| L1 cache | 64KB/core |
| L2 cache | 16MB |
| L3 cache | 64MB |
| TDP | 350W |
| Socket | sTR5 |
| Process | TSMC 4nm |
| Memory type | DDR5 |
| Integrated graphics | None |
| Chipsets | WRX90 |
| Launch MSRP | $2,499 |
| OEM / tray part number | 100-000000725 |