AMD® Ryzen™ 9 3900XT

The AMD Ryzen 9 3900XT is a desktop processor with 12 cores and 24 threads, built on the Zen 2 architecture (7 nm process). It launched in Jul 2020. Clocks run from 3.8 GHz base to 4.7 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 3900XT scores 2,742 in single-core performance and 32,457 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 9,434 for overall performance, 24,936 for productivity performance, 22,787 for creator performance, 35,297 for engineering performance and 16,340 for gaming performance. Its multi-core throughput works out to 2,705 per core, 1,352 per thread and 309 per watt. Its computed efficiency index is 921. Its performance index is 117, so its overall performance is 17% 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 3900XT scores 99,435 in integer math, 58,411 in floating-point math, 451,215 in compression, 28,546 in cryptography, 1,755 in physics simulation, 28,487 in vector SIMD, 212 in the prime sieve and 48,112 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, 98% above in compression, 148% above in cryptography, 61% above in physics simulation, 84% above in vector SIMD, 216% 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 3900XT 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 4.70 GHz.

The AMD Ryzen 9 3900XT 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 2020.

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

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

The AMD Ryzen 9 3900XT 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 3900XT 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 3900XT. 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 3900XT and have the closest multi-core scores in the Feex database include AMD Ryzen 9 3900X, AMD Ryzen 9 5900, AMD Ryzen 9 3900, AMD Ryzen 9 PRO 5945 and AMD Ryzen 7 5800X3D.