AMD’s Radeon RX 7900 XT graphics card will be the first GPU to feature a chiplet design with up to seven dies. Contrary to prior rumors, there will be only one 5nm compute die (GCD) packing a total of 12,288 shaders across 96 compute units (CUs) or 48 Workgroup Processors (WGPs). The remaining six dies will be 6nm MCDs which is short for either Memory Complex Dies or Memory Controller Dies.
This latest update comes from well-reputed tipster @kopite7kimi who has an almost flawless record on AMD and NVIDIA leaks. This means Team Red will be mostly on even footing with NVIDIA in terms of profit margins and BOM as the GCD is easily the most expensive component. Both vendors will be relying on TSMC’s 5nm class process nodes for their chip supply this cycle.
The 6nm MCDs should contain the L3 “Infinity” cache. The top-end Navi 31 GPU powering the RX 7900 XT is expected to pack between 256-512MB of last-level cache. The RX 7800 XT (Navi 32) reduces it to 128-1920MB across four MCDs while the RX 7700 XT will be a monolithic design with 64MB of cache.