The world’s first chiplet GPU, Navi31 makes use of TSMC’s fanout technology (InF

S) to lower costs, surrounding a central 48 WGP Graphics Chiplet Die (GCD) with 6 Memory Chiplet Dies (MCD), each containing 16MB of Infinity Cache and the GDDR6 controllers with 64-bit wide PHYs. The organic fanout layer has a 35-micron bump pitch, the densest available in the industry. There is a 3D stacked MCD also being productized (1-hi) using TSMC’s SoIC. While this doubles the Infinity Cache available, the performance benefit is limited given the cost increase. Thus, the main Navi31 SKU will have 96MB of Infinity Cache (0-hi). This is lower than the 128MB in Navi21.