# Rare AMD Ryzen 9 5900X3D Processor Sample Leaks

October 2, 2026 at 01:31 PM

> A leaked engineering sample of the unreleased 12-core AMD Ryzen 9 5900X3D reveals high boost clocks and a dual-CCD 128 MB cache design.

A rare [AMD](<https://hardwarebrief.com/entity/amd-q128896>) **Ryzen 9 5900X3D** engineering sample has surfaced in CPU-Z screenshots shared by **Chiphell** user Lingwu Road. The [Zen 3](<https://hardwarebrief.com/entity/zen-3-q96416013>) processor features a 12-core, 24-thread configuration and achieved boost clock speeds between 4.65 GHz and 4.73 GHz during testing.

The leaked chip utilizes a dual-CCD design with a total of 128 MB of L3 cache, split between 32 MB on one die and 96 MB on the other. While AMD showcased this model at its Austin campus years ago, it only released the 5800X3D, 5700X3D, 5600X3D, and 5500X3D.

This discovery offers a look at a high-end Zen 3 variant that never reached the consumer market. The engineering sample demonstrates that AMD experimented with dual-CCD **3D V-Cache** configurations for the Ryzen 9 series long before finalizing its AM4 lineup.


[#AMD](<https://hardwarebrief.com/hashtag/AMD>) #Ryzen9 #5900X3D #Zen3 [#PCGaming](<https://hardwarebrief.com/hashtag/PCGaming>)

## Related news

## [Linux Kernel 7.4 to Boost AMD APU Performance](<https://hardwarebrief.com/article/linux-kernel-7-4-to-boost-amd-apu-performance-93b5b17c>)

October 3, 2026 at 01:37 PM

## [Razer Unveils Huntsman V3 Pro Mini 8KHz Keyboard](<https://hardwarebrief.com/article/razer-unveils-huntsman-v3-pro-mini-8khz-keyboard-743a4bbf>)

October 2, 2026 at 06:55 PM

## [32GB RAM Becomes Most Popular on Steam Survey](<https://hardwarebrief.com/article/32gb-ram-becomes-most-popular-on-steam-survey-4c50e069>)

October 2, 2026 at 05:03 PM

## [Microsoft Expands ASD Support to NVIDIA and Intel](<https://hardwarebrief.com/article/microsoft-expands-asd-support-to-nvidia-and-intel-a8a9696b>)

October 2, 2026 at 02:33 PM

## [DLSS 5 Utility Boosts AMD GPU Performance by 74%](<https://hardwarebrief.com/article/dlss-5-utility-boosts-amd-gpu-performance-by-74-632a6481>)

September 27, 2026 at 10:54 AM