The Radeon RX 7900 XT is said to be equipped with 20 GiB of memory. It is a slightly trimmed down version of the Navi 31, which will be released in its full 24 GiB configuration.
After Navi 31 rumors promised double the raster performance and even more than double the ray tracing performance this week, they are now commenting on the memory team as well. So the Radeon RX 7900 XT should have 20 GiB GDDR6, without X. Then it should probably be around 19 Gb/s.
The same source also reports that the Radeon RX 7900 could be faster than expected. Twitter user “Greymon55” spoke of twice the plot performance compared to its predecessor. Meanwhile, “Enthusiastic Citizen” in Bilibili says that the Radeons might have a hard time against Ada. Who you want to believe is probably a matter of taste for everyone.
As for storage, he says that the original design was supposed to have 24 GiB, but later the amount was reduced to 20 GiB. Of course, this is only possible in parallel with the memory interface, which becomes narrower as a result and the bandwidth also varies with it. However, a full 24 GiB expansion should be possible from Navi 31, it could be released as the Radeon RX 7950 XT and is said to carry the Geforce RTX 4090 Ti on its chest.
According to the latest status, Navi 31 should have a GCD (Graphics Core Die) with 48 WGP, 12 SA and 6 SE when fully expanded. This should result in 12,288 FP32 shader ALUs. It should be 96 MiB Infinity Cache and 348 Bit at 24 GiB. The capped version for the Radeon RX 7900 XT is said to have 42 WGP or 10,752 FP32 shader ALUs. Also, 80 MiB Infinity Cache and the aforementioned 20 GiB of 320-bit memory. The Infinity Cache in the MCM design comes from up to six MCDs with 16 MiB each. There should also be a stacked variant that doubles the memory per chip. That would allow a maximum of 192 MiB.
Font: WCCF technology
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