AMD · Ryzen 9 · 2021 · AM4
The AMD Ryzen 9 5900 is a desktop processor with 12 cores, released in 2021 at an MSRP of $399. It is part of the Ryzen 9 lineup, using the Ryzen 5000 platform, and fits the AM4 socket. Internally, it is built on the "Zen 3" architecture. Thanks to AMD Simultaneous Multi-Threading (SMT), each core can handle two instruction streams simultaneously, yielding a total of 24 threads for improved parallelism. The Ryzen 9 5900 has a base clock of 3 GHz and can boost up to 5.3 GHz depending on workload and thermal headroom. AMD manufactures the "Zen 3" silicon on a 7nm process node. The multiplier is unlocked, making overclocking straightforward. This processor supports DDR4 memory. ECC memory is supported, provided the motherboard enables it. With a TDP of 65W, the Ryzen 9 5900 is an efficient chip suitable for modest cooling solutions. This processor has no integrated graphics — a discrete GPU is required. The cache hierarchy consists of 64KB/core of L1, 6MB of L2, and 64MB of L3 cache — an unusually large L3 that greatly benefits latency-sensitive workloads like gaming.
65W non-X variant of the 5900X. Same 12-core Zen 3 silicon at lower TDP.
| Brand | AMD |
|---|---|
| Family | Ryzen 9 |
| Series | Ryzen 5000 |
| Architecture | Zen 3 |
| Type | Desktop |
| Launch year | 2021 |
| Cores | 12 |
| Threads | 24 |
| Base clock | 3 GHz |
| Boost clock | 5.3 GHz |
| L1 cache | 64KB/core |
| L2 cache | 6MB |
| L3 cache | 64MB |
| TDP | 65W |
| Socket | AM4 |
| Process | 7nm |
| Memory type | DDR4 |
| Integrated graphics | None |
| Chipsets | X570, B550, X470, B450, A520, X370, B350, A320, X300, B300 |
| Launch MSRP | $399 |
| OEM / tray part number | 100-000000062 |