I was also In the process of reordering a 7900XTX and saw the prices of the 4080 and starting to wonder. I still think the XTX is the overall better value as I don’t use RT or any of the stuff Nvidia has that makes people choose their GPU. The 24GB of VRAM and displayPort 2.1 I feel adds more value especially for the future in my opinion
At the same price point it becomes a tricky decision, with the XTX at a cheaper price point I think it's an easy decision - you go with the XTX.
The Sapphire Nitro+ XTX, arguably the best AIB XTX, is available for £1100. Zotac Gaming Trinity 4080 is available for the same price, but looks to be one of the worst non-reference cards (boost and base clocks are the same as reference).
Sapphire Nitro+ 7900 XTX - £1100
+ Identical rasterised performance to 4080 and in some cases beating the 4090
+ More VRAM than 4080 which
may offer greater longevity
+ Can be used with AMD Smart Access Memory for a notable performance boost at 1080p/1440p and marginal at 4K
+ AMD software better than NVIDIA's
+ More room to overclock
+ Better thermals and design
+ Driver updates will
hopefully improve performance over the long-term
- Worse RT performance than the 4080
- Worse productivity performance than the 4080 (irrelevant to me personally)
+/- FSR 3.0
may bring it closer to DLSS 3.0 (speculative)
Also comes with a free copy of The Last of Us.
Zotac Gaming Trinity 4080 - £1100
+ Greater RT performance than the 7900 XTX
+ Greater productivity performance than the 7900 XTX
+ DLSS 3.0
+ 5 year warranty vs 3 year with the 7900 XTX
- Less VRAM than the 7900 XTX which
may impact longevity
- NVIDIA software is worse than AMD's
- Cannot be used with AMD Smart Access Memory
- Less room to overclock
- Worse thermals and design
+/- More stable drivers
at this current moment in time
It basically comes down to RT performance and DLSS, which is something I don't really have an opinion on because I've never used either before. Driver updates for the XTX should hopefully yield performance improvements and FSR 3.0 should be an improvement over 2.0 (to bring it closer in line with DLSS 3.0). RT performance on the XTX isn't terrible by any means, but it's a good 10-20% behind the 4080.
My head is saying the XTX will be the better long-term pick. It
should improve over time with driver updates and things like FSR 3.0. Higher VRAM should be of more significance a few years down the line when AAA titles start eating up more memory.
If the 4080's continue to drop in price then it will definitely become more of a difficult decision, but then you'd expect the XTX to follow the same trend (the Nitro+ XTX was £1170 less than a month ago).