The AMD Ryzen 5 Pro 9645 is a desktop processor built on a 4 nm semiconductor process and designed for the AM5 socket, with compatibility across X670, B650, X870, B840, and B850 chipsets. It carries a thermal design power of 65W and a maximum operating temperature of 95 °C. The processor includes integrated graphics and fully supports 64-bit computing, while also featuring PCIe 5.0 for modern connectivity.
The processor runs six cores at a base speed of 3.9 GHz each, supporting 12 threads in total, with a turbo clock speed reaching 5.4 GHz and a clock multiplier of 39. It does not feature an unlocked multiplier and does not use big.LITTLE technology. On the cache side, it offers 480 KB of L1 cache, 6 MB of L2 cache at 1 MB per core, and a 32 MB L3 cache at 5.33 MB per core, providing a layered memory hierarchy to support sustained workloads.
In PassMark testing, the processor achieves a multi-core score of 30,827 alongside a single-core score of 4,586, reflecting its measured throughput across both parallel and single-threaded workloads.
The integrated graphics unit reaches a GPU turbo frequency of 2200 MHz, representing the peak clock speed available from the on-chip graphics solution.
The processor supports DDR5 memory across two channels, with a maximum RAM speed of 5600 MHz and a total capacity ceiling of 192 GB. It also includes support for ECC memory, which allows for automatic detection and correction of memory errors — a feature particularly relevant in reliability-focused desktop deployments.
The processor supports a broad set of instruction sets including MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2, covering a wide range of computational and security-oriented operations. It also makes use of multithreading to handle multiple threads simultaneously, and includes the NX bit for hardware-level memory protection against certain classes of malicious code execution.
