From the Nvidia charts:
RTX 4090 2-4x faster than 3090 Ti
RTX 4080 2-4x faster than 3080 Ti (For the 16GB 4080 I guess)
Considering that the 3090 TI outperforms a 3000 Ti only by ~20% at best and the huge difference in CUDA cores between the 4090 vs 4080 I call bullshit.
My take on real world numbers. 4090 is ~50% faster than a 3090 TI. 4080 16GB is roughly on par with a 3090. Raytracing games might benefit more. Hopefully Nvidia fixed their memory temperatures this time...
I have a 3-year old GPU with 16 GB memory, which was $800 at that time (a Radeon VII) and now NVIDIA offers 16 GB only in a $1200 GPU. While the largest memory that I have in an NVIDIA card is 8 GB, that card (a RTX 2060 Super) was 3 times cheaper than the card that NVIDIA offers now with 16 GB.
Moreover, even supposing that RTX 4090 is worth $1600, which was about the price that I expected for it, then I have expected that a card with a GPU size of 9.5/16 of 4090 and with a memory size of 2/3 should not have a price above $1000.
I have also expected that a card with a GPU size of 7.5/16 of 4090 and with a memory size of 1/2 should have a price around $700.
Instead of that, NVIDIA has added $200 to the expected prices of the 2 RTX 4080 cards.
RTX 4090 might be worthwhile for who can afford it, but the two so-called RTX 4080 cards are very overpriced in comparison with it.
As someone has commented on another site, this probably means that NVIDIA does not really want to sell any of the RTX 4080 cards, but they were launched only to push the potential customers to acquire the very expensive RTX 4090, because it appears that for a relatively small extra expense you get a much better performance with the top model than with the 2 lower models.