AMD “Navi 31” Rumored to Feature 384-bit GDDR6 Memory Interface
This 50 percent increase in memory bus width, runs in concert with two associated rumors—one, that the company will use faster 20 Gbps GDDR6 memory chips; and two, that AMD may increase the size of the on-die Infinity Cache memory. Samsung is already mass-producing 20 Gbps and 24 Gbps GDDR6 memory chips. These are regular GDDR6 memory chips with JEDEC-standard signaling, and not GDDR6X, an exclusive memory type innovated by NVIDIA and Micron Technology, which leverages PAM4 signaling to increase data-rates. A theoretical “Navi 31” with 20 Gbps GDDR6 memory speeds would enjoy 960 GB/s of memory bandwidth, a massive 87.5 percent bandwidth increase over the RX 6900 XT. The on-die Infinity Cache operates at speeds measured in several TB/s. The increased bus width could also signal an increase in memory sizes, with the RX 6950 XT successor featuring at least 24 GB of memory.