AMD® Ryzen™ 5 PRO 9645

The AMD Ryzen 5 PRO 9645 is a desktop processor with 6 cores and 12 threads, built on the Zen 5 architecture. It launched in Jan 2026. Clocks run from 3.9 GHz base to 5.4 GHz boost. A 32-MB L3 cache backs the cores (6.4 MB per core). It addresses DDR5 memory up to 192 GB across 2 channels. The chip drops into the AM5 socket and exposes PCIe 5.0 (28 lanes). Rated TDP is 65 W. Notable platform capabilities: AVX-512, AVX-VNNI, AMD-V (Hardware Virtualization), AMD SEV.

The AMD Ryzen 5 PRO 9645 scores 4,636 in single-core performance and 31,434 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 12,072 for overall performance, 26,923 for productivity performance, 25,634 for creator performance, 31,238 for engineering performance and 21,767 for gaming performance. Its multi-core throughput works out to 5,239 per core, 2,620 per thread and 484 per watt. Its computed efficiency index is 1,497. Its performance index is 150, so its overall performance is 50% above the Intel Core i5-12400 (index 100). Each bar shows the score as a share of a reference ceiling, which is the larger of the 99th-percentile score across the Feex CPU database and a fixed baseline.

Scores for individual PassMark CPU Mark test categories. Higher is better. These are measured test scores, not computed from the single-core and multi-core ratings.

In the individual workload tests the AMD Ryzen 5 PRO 9645 scores 90,078 in integer math, 60,735 in floating-point math, 352,131 in compression, 17,050 in cryptography, 1,905 in physics simulation, 28,791 in vector SIMD, 230 in the prime sieve and 37,913 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 53% above in integer math, 32% above in floating-point math, 54% above in compression, 48% above in cryptography, 75% above in physics simulation, 86% above in vector SIMD, 243% above in the prime sieve and 67% above in sorting. Each bar shows the score as a share of that workload's reference ceiling, the larger of the 99th-percentile score across CPUs with a recorded value and a fixed baseline.

The AMD Ryzen 5 PRO 9645 has 6 physical cores and runs 12 logical threads. It runs 2 threads per core. It runs at a base clock of 3.90 GHz and boosts up to 5.40 GHz.

The AMD Ryzen 5 PRO 9645 is a desktop processor, belongs to the AMD Ryzen 5 family, uses the Zen 5 architecture, carries the codename Granite Ridge and is manufactured on a 4 nm process. It launched in Jan 2026.

The AMD Ryzen 5 PRO 9645 has 480 KB of L1 cache, 6 MB of L2 cache and 32 MB of L3 cache. That adds up to about 38.5 MB of cache, or 6.41 MB per core. Each core has 1 MB of private L2 cache.

The AMD Ryzen 5 PRO 9645 has a 3-level cache hierarchy: L1 at 480 KB, L2 at 6 MB and L3 at 32 MB. L3 is the largest level and makes up about 83% of the cache listed here.

The AMD Ryzen 5 PRO 9645 supports DDR5 memory, addresses up to 192 GB of memory and uses 2 memory channels. It does not support DDR4 and LPDDR memory.

The AMD Ryzen 5 PRO 9645 includes integrated graphics.

The AMD Ryzen 5 PRO 9645 uses the AM5 socket, supports PCI Express 5.0 and provides up to 28 PCIe lanes.

The AMD Ryzen 5 PRO 9645 has a rated TDP of 65 W.

Instruction sets, security, virtualization, AI acceleration and OS readiness. Features are listed as supported, explicitly not supported, or not recorded; a feature that is not recorded is not the same as unsupported.

The AMD Ryzen 5 PRO 9645 is manufactured by TSMC.

The AMD Ryzen 5 PRO 9645 is also identified by the model number 9645 and the SKU 100-000001409.

Feex has recorded 59% of the specifications it tracks for the AMD Ryzen 5 PRO 9645. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, Hybrid Architecture, All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: L4 Cache. Memory Support: Memory Bandwidth, ECC Memory and Max Memory Speed. Graphics: Graphics Base Clock, Graphics Max Clock, Execution Units, Display Outputs and Max Video Memory. Platform & Compatibility: Package and Package Size. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size, Die Count and Launch Price. Naming & Aliases: Processor Number and Part Number.

Processors that use the same AM5 socket as the AMD Ryzen 5 PRO 9645 and have the closest multi-core scores in the Feex database include AMD Ryzen 7 8700G, AMD Ryzen 7 PRO 8700G, AMD Ryzen 5 PRO 9655, AMD Ryzen 7 8700F and AMD EPYC 4245P.