12-Core Zen 5 Processing
Built on AMD’s Zen 5 architecture, the Ryzen 9 9900X provides 12 cores and 24 threads for desktop workloads.
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Updated 3 months ago
The 12-core variant of the Zen 5 lineup, offering enhanced productivity performance over the 7900X.

Built on AMD’s Zen 5 architecture, the Ryzen 9 9900X provides 12 cores and 24 threads for desktop workloads.
The processor runs at a 4.4 GHz base clock and can reach up to 5.6 GHz max boost clock.
AM5 socket compatibility pairs with DDR5 memory support, PCIe 5.0, and 28 total PCIe lanes for current desktop builds.
The AMD Ryzen 9 9900X is a Zen 5 desktop boxed processor with 12 cores, 24 threads, AM5 socket support, DDR5 memory support, PCIe 5.0 connectivity, integrated AMD Radeon Graphics, and a 120W default TDP.
The reviewer considers the 9900X the best pick of the Ryzen 9000 series, praising its rational pricing and high-quality silicon which closes the gap between the 12-core and 16-core models.
While acknowledging its strong multithreaded performance for professional workloads, the reviewer cannot recommend the CPU due to poor value compared to the last-gen Ryzen 9 7900X.
The reviewer rates it as excellent, noting it matches Intel's Core i7-14700K in performance while being significantly more power-efficient and running cooler.
The reviewer concludes that AMD's previous-generation Zen 4 CPUs offer better value for most users, finding only marginal performance improvements of 0-10% over the 7900X.
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| Attribute | Specification | Notes |
|---|---|---|
| Architecture | Zen 5 | |
| Base Clock | 4.4 | |
| Base Clock Speed | 4.4 GHz | GHz |
| Cache L3 | 64 | |
| Cache Size | 64 MB | MB |
| Capacity | 256 | |
| Compatibility | ['AM5', 'PCIe 5.0', 'DDR5', 'DDR5 UDIMM', 'A620', 'B650', 'B650E', 'X670', 'X670E', 'X870', 'X870E', 'B840', 'B850'] | |
| Component Type | CPU | |
| Core Count | 12 cores | cores |
| Cpu Cooler Included | False | |
| Cpu Microarchitecture Generation | Zen 5 | |
| Cpu Socket | AM5 | |
| Form Factor | Desktops, Boxed Processor | |
| Included Cooler | No | |
| Integrated Gpu Model | AMD Radeon Graphics | |
| Integrated Graphics | Yes | |
| Interface Standard | ['PCIe 5.0', 'Native PCIe lanes: 28 total / 24 usable', 'DDR5', 'CPU socket: AM5'] | |
| Launch Date | 2024-08-15 | |
| Manufacturer | AMD | |
| Manufacturing Process | TSMC 4nm FinFET (CPU cores) / TSMC 6nm FinFET (I/O die) | |
| Max Boost Clock | 5.6 | |
| Max Boost Clock Speed | 5.6 GHz | GHz |
| Max Memory Speed | 5600 | |
| Max Turbo Power | 162 | |
| Memory Channels | 2 | |
| Memory Support | DDR5-5600 (2x1R/2x2R) and DDR5-3600 (4x1R/4x2R) | |
| Memory Type Support | 3 | |
| Overclocking Support | Yes | |
| Pcie Lane Count | 28 | |
| Pcie Version | PCIe 5.0 | |
| Pci Express Version | PCIe 5.0 | |
| Performance Spec | ['12 cores', '24 threads', 'Up to 5.6 GHz max boost', '4.4 GHz base clock', 'Default TDP 120W'] | |
| Power Requirements | 120 | |
| Process Node | TSMC 4nm | |
| Socket | AM5 | |
| Tdp Processor Base Power | 120 | |
| Thermal Design | ['Max. Operating Temperature (Tjmax) 95°C'] | |
| Thermal Design Power | 120 W | W |
| Thread Count | 24 threads | threads |
| Unlocked Multiplier Overclocking | True | |
| Warranty Period | 36 |

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