According to a Chiphell leaker, both of the upcoming Radeon RX 6600 series graphics cards(RX 6600 XT/RX 6600) would feature Navi 23 GPU and 8GMB memory.
A place where many of those rumors start is Chiphell, which now has an interesting thread with alleged specifications of RX 6600 models. According to the leaker, AMD Radeon RX 6600 XT would feature Navi 23 GPU with 2048 Stream Processors. That said, the XT variant would feature fully spec’ed Navi 23. A cut-down variant would be used by RX 6600 non-XT which is allegedly going to feature 1792 cores.
It is said that both models would feature 8GB GDDR6 memory across a 128-bit interface. The leaker also provides performance figures claiming that RX 6600 XT scores 9439 points in 3DMark Time Spy (Graphics) while the non-XT card scores 7805 points. Assuming that those numbers are correct, both cards would compete with AMD’s own RX 5700 XT and RX 5700 models respectively.