An engineering sample of the AMD Ryzen 9 5900X3D processor has surfaced, revealing that the company explored higher-spec Zen 3 models with 3D V-Cache technology. The chip features 12 cores and 24 threads, utilizing a 128MB L3 cache configuration, which combines the native 64MB L3 with an additional 64MB of stacked 3D V-Cache.
This discovery indicates that AMD tested multi-core X3D variants beyond the 8-core Ryzen 7 5800X3D released in 2022. While the 5800X3D became a significant upgrade for the AM4 platform, the 12-core 5900X3D and 16-core 5950X3D models were never brought to the consumer market.
The 128MB L3 cache design was intended to reduce memory latency in cache-sensitive gaming workloads. However, the performance impact of such a configuration remains speculative, as engineering samples often differ from final retail products in terms of clock speeds, voltage, and power consumption.
AMD's decision to prioritize the 8-core 5800X3D for its initial 3D V-Cache rollout was likely driven by a strategy to simplify product complexity and validate the new packaging technology. This approach allowed users on the AM4 platform to boost gaming performance without requiring motherboard or memory upgrades.
