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AMD
AMD Ryzen 9 3900X 12-Core 3.8 GHz desktop processor
12-core desktop processor with 24 threads, 3.8 GHz base clock, 4.6 GHz max boost, 64 MB L3 cache and 105 W TDP for Socket AM4 motherboards
- Processors TypeDesktop
- NameRyzen 9 3900X
- CPU Socket TypeSocket AM4
- Core NameMatisse (Zen 2)
- # of Cores12-Core
- # of Threads24-Threads
- 12 cores and 24 threads for heavy multi-threaded workloads
- 8 GHz base clock with 4.6 GHz max boost for strong single-thread speed
- 64 MB L3 cache reduces latency in data-intensive tasks
- 105 W TDP fits standard AM4 cooling solutions
- PCIe 4.0 support with 16 lanes enables high-speed storage and GPUs
12-Core Ryzen 9 3900X for desktop builds
This 12-core processor targets content creators and multitaskers who need sustained throughput on Socket AM4. With 24 threads and a 3.8 GHz base clock it moves through rendering, compilation and heavy multitasking without bottlenecks. The 7 nm Matisse architecture keeps power draw at 105 W while delivering 4.6 GHz max boost for burst workloads. Windows 11 support is confirmed.
64 MB L3 cache and PCIe 4.0 headroom
The 64 MB L3 cache feeds all 12 cores during large dataset work, while 6 MB L2 handles per-core hot data. Dual-channel DDR4 memory scales bandwidth for memory-bound tasks. Sixteen PCIe lanes at revision 4.0 or 3.0 give fast GPU and storage connectivity until the lane budget is exhausted. Heavily threaded loads saturate the 105 W envelope, so sustained clocks settle below the 4.6 GHz peak.
Bundled Wraith Prism cooler enables immediate
The included Wraith Prism cooler mounts directly on Socket AM4 without extra hardware, letting builders boot straight into the OS. RGB lighting on the cooler is controllable through motherboard software for basic aesthetics. No thermal paste tube or mounting brackets are supplied, so reuse existing compound or source separately. The processor ships without original retail packaging or manual.
Highlights
- 12 cores and 24 threads for heavy multi-threaded workloads
- 8 GHz base clock with 4.6 GHz max boost for strong single-thread speed
- 64 MB L3 cache reduces latency in data-intensive tasks
- 105 W TDP fits standard AM4 cooling solutions
- PCIe 4.0 support with 16 lanes enables high-speed storage and GPUs
Specifications
| Brand | AMD |
|---|---|
| Processors Type | Desktop |
| Series | Ryzen 9 3rd Gen |
| Name | Ryzen 9 3900X |
| CPU Socket Type | Socket AM4 |
| Core Name | Matisse (Zen 2) |
| # of Cores | 12-Core |
| # of Threads | 24-Threads |
| Operating Frequency | 3.8 GHz |
| L2 Cache | 6MB |
| L3 Cache | 64MB |
| Manufacturing Tech | 7nm |
| Instruction Set | 64-Bit |
| Memory Channel | 2 |
| Virtualization Technology Support | Yes |
| PCI Express Revision | 4.0 / 3.0 |
| Max Number of PCI Express Lanes | 16 |
| Thermal Design Power | 105W |
| Cooling Device | Cooling device not included - Processor Only |
| Operating System Supported | Windows 11 |
Questions about this item
Will my existing AM4 motherboard and DDR4 memory work with the Ryzen 9 3900X?
The processor uses the Socket AM4 interface and supports DDR4 memory in dual-channel mode, so current AM4 boards and DDR4 modules are compatible.
How can I confirm the 12-core chip is hitting its 4.6 GHz max boost after installation?
Monitor per-core clocks under single-threaded load; you should see frequencies reach 4.6 GHz on one or two cores while the 105 W TDP is respected.
Does the 100-100000023BOX package include a cooler or do I need to buy one separately?
The supplier notes no cooler is included and the CPU ships without the original box or manual, so a separate AM4-compatible cooler is required.
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