AMD's next-gen RDNA 4 GPU architecture has been in the headlines a couple of times this week, now we're hearing that Radeon RX 8000 series cards will feature 48MB to 64MB of next-gen Infinity Cache.

In a new post on X, leaker "Kepler_L2" was asked about IC (Infinity Cache) sizes on AMD's next-gen RDNA 4 GPUs, to which he simply replied "64, 64, 48". The decode on that is that we will see the RDNA 4-powered Radeon RX 8000 series (unless they stupidly insert AI-something into the name) in 3 different configurations.

AMD's first RNDA 4-based card rumored would be the Radeon RX 8800 XT and should have a 256-bit memory bus with 20Gbps GDDR6 memory and 64MB of next-gen Infinity Cache, the second (RX 8700 XT) should have a 256-bit memory bus with 18Gbps GQDDR6 memory and 64MB of Infinity Cache, while the last RDNA 4 card (RX 8600 XT) should have a 192-bit memory bus with 19Gbps GDDR6 memory.

In comparison, the Navi 32 XT powers the Radeon RX 7800 XT (RDNA 3) with 19.5Gbps GDDR6 memory (16GB GDDR6) and 64MB of Infinity Cache. AMD would keep the same amount of Infinity Cache on its successor -- the RX 8800 XT -- but it is next-gen Infinity Cache, so it'll be faster. The 19.5Gbps GDDR6 gets bumped up to 20Gbps, so we'll see a tiny bump in memory bandwidth, too.