AMD® Ryzen™ 9 3900X

The AMD Ryzen 9 3900X is a desktop processor with 12 cores and 24 threads, built on the Zen 2 architecture (7 nm process). It launched in Jul 2019. Clocks run from 3.8 GHz base to 4.6 GHz boost. A 64-MB L3 cache backs the cores (5.9 MB per core). It supports DDR4 memory. The chip drops into the AM4 socket and exposes PCIe 4.0 (24 lanes). Rated TDP is 105 W. Notable platform capabilities: AMD-V (Hardware Virtualization).

The AMD Ryzen 9 3900X scores 2,702 in single-core performance and 32,467 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 9,366 for overall performance, 24,886 for productivity performance, 22,720 for creator performance, 35,308 for engineering performance and 16,223 for gaming performance. Its multi-core throughput works out to 2,706 per core, 1,353 per thread and 309 per watt. Its computed efficiency index is 914. Its performance index is 116, so its overall performance is 16% 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 9 3900X scores 99,383 in integer math, 58,369 in floating-point math, 448,583 in compression, 28,534 in cryptography, 1,778 in physics simulation, 29,196 in vector SIMD, 213 in the prime sieve and 48,131 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 69% above in integer math, 27% above in floating-point math, 97% above in compression, 148% above in cryptography, 63% above in physics simulation, 88% above in vector SIMD, 218% above in the prime sieve and 112% 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 9 3900X has 12 physical cores and runs 24 logical threads. It does not use a hybrid performance and efficiency core layout. It runs 2 threads per core. It runs at a base clock of 3.80 GHz and boosts up to 4.60 GHz.

The AMD Ryzen 9 3900X is a desktop processor, belongs to the AMD Ryzen 9 family, uses the Zen 2 architecture, carries the codename Matisse and is manufactured on a 7 nm process. It launched in Jul 2019.

The AMD Ryzen 9 3900X has 768 KB of L1 cache, 6 MB of L2 cache and 64 MB of L3 cache. That adds up to about 70.8 MB of cache, or 5.90 MB per core. Each core has 512 KB of private L2 cache.

The AMD Ryzen 9 3900X has a 3-level cache hierarchy: L1 at 768 KB, L2 at 6 MB and L3 at 64 MB. L3 is the largest level and makes up about 90% of the cache listed here.

The AMD Ryzen 9 3900X supports DDR4 memory, uses 2 memory channels, runs memory at up to 3,200 MT/s and delivers up to 51.2 GB/s of memory bandwidth. It does not support DDR5 and LPDDR memory.

The AMD Ryzen 9 3900X does not include integrated graphics, so a discrete graphics card is required for display output.

The AMD Ryzen 9 3900X uses the AM4 socket, supports PCI Express 4.0 and provides up to 24 PCIe lanes.

The AMD Ryzen 9 3900X has a rated TDP of 105 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 9 3900X is manufactured by TSMC. It launched at a price of $499.

Feex has recorded 60% of the specifications it tracks for the AMD Ryzen 9 3900X. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, All-Core Boost and Unlocked Multiplier. Architecture & Generation: ISA Family and Market Status. Cache: L4 Cache. Memory Support: ECC 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 and Die Count. Naming & Aliases: SKU, Model Number, Processor Number and Part Number.

Processors that use the same AM4 socket as the AMD Ryzen 9 3900X and have the closest multi-core scores in the Feex database include AMD Ryzen 9 3900XT, AMD Ryzen 9 5900, AMD Ryzen 9 PRO 5945, AMD Ryzen 9 3900 and AMD Ryzen 7 5800X3D.