Not
much weird honestly.
This tier products have always been superior to previous gen $700-900 products (RTX 3070 outperforming 2080 Super; RTX 2070 being close to GTX 1080 Ti in terms of raw performance also providing with DLSS and RT which makes this card superior; GTX 1070 Ti is faster than any Maxwell, and so on).
Now we've got a 7900 XT which is not just on par but a bit better than all RDNA2 and Ampere GPUs. $600 is a little cheap but $650 to $680 seem to be appropriate.
7800 XT is priced completely right despite its naming being as confusing as possible. 7900 XTX for $800 is a bit exaggeration and $900 to $920 MSRP would make a lot of sense. 7700 XT for $380 would be a no-brainer so I see $400 sharp as the most appropriate launch price.
What about RX 7600... This GPU spawned in the wrong place and the wrong time. Market, basically, is of no particular need for cards of this segment. Anything below $300 is covered by second-hand market like you it or not. RDNA3 exclusive features came out way too late to justify this card. Product is right, price is right but conditions failed it.
Overall, I'd buy a 7800 XT but I live in a weird place where you can get 6900 XT for almost 50% cheaper so it's kinda no brainer for me at the moment. Knowing our market, this will stay at "$400 for 6900 XT and $700 for 7800 XT" for a very long time, not gonna change before RDNA4 pops out for sure.
In case you're unfamiliar, RDNA3 is still worse than nVidia's GPUs in terms of RT, has no DLSS, worse in content creation (because does not have CUDA cores), and consumes more watts per FPS. Not considering these moments is insane.
Overall:
• RX 6500 XT ($200) → RX 7600 ($270). About double the performance for a little bit more money. Excellent.
• RX 6700 non-XT ($430) → RX 7700 XT ($450). About 150% the performance for virtually the same money (inflation-wise). Good.
• RX 6700 XT ($480) → RX 7800 XT ($500). About 150% the performance for virtually the same money. Good.
• RX 6800 non-XT ($580) → RX 7900 GRE ($650). About 120% the performance for a little bit more money. Bad. RX 7900 GRE is overall heavily handicapped by its slow VRAM. Including 20 Gbps VRAM like in higher tier GPUs with a little bit higher core clocks would justify these $650. I think it's the only RDNA3 GPU which has to be improved physically and not economically.
• RX 6800 XT ($650) → RX 7900 XT ($900). About 135% the performance for a bit more money. Bad. I know the current price is adequate but MSRP is balls.
• RX 6900 XT ($1000) → RX 7900 XTX ($1000). About 150% the performance for less money if we include inflation. Very good.