While the bandwidth provided by PCIe 3.0 is found to be sufficient for most GPUs with adequate VRAM, the 4GB Radeon RX 5500 XT is found to be struggling possibly due to its PCIe x8 limitation.
Rx 5500 series RSS
The anticipated RX 5600 series GPU has made its way into the Eurasian Economic Commission database as AMD AIB partners - ASRock and ASUS - register multiple entries of upcoming RX 5600 variants.