AMD · Threadripper · 2020 · TRX40
The AMD TR 3990X is a desktop processor with 64 cores, released in 2020 at an MSRP of $3,990. It is part of the Threadripper lineup, using the TR 3000 platform, and fits the TRX40 socket. Internally, it is built on the "Zen 2" architecture. Thanks to AMD Simultaneous Multi-Threading (SMT), each core can handle two instruction streams simultaneously, yielding a total of 128 threads for improved parallelism. The TR 3990X has a base clock of 2.9 GHz and can boost up to 4.3 GHz depending on workload and thermal headroom. AMD manufactures the "Zen 2" 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 280W, the TR 3990X 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, 32MB of L2, and 256MB of L3 cache — an unusually large L3 that greatly benefits latency-sensitive workloads like gaming.
| Brand | AMD |
|---|---|
| Family | Threadripper |
| Series | TR 3000 |
| Architecture | Zen 2 |
| Type | Desktop |
| Launch year | 2020 |
| Cores | 64 |
| Threads | 128 |
| Base clock | 2.9 GHz |
| Boost clock | 4.3 GHz |
| L1 cache | 64KB/core |
| L2 cache | 32MB |
| L3 cache | 256MB |
| TDP | 280W |
| Socket | TRX40 |
| Process | 7nm |
| Memory type | DDR4 |
| Integrated graphics | None |
| Chipsets | TRX40 |
| Launch MSRP | $3,990 |
| Part number | 100-100000163WOF |
| OEM / tray part number | 100-000000163 |