Pretty sure a 4080 is worth more than a 3090 but we will soon see what happens marketwise. It's just a pre assumption.
They both go for around the same in the used market but I think we are missing some important factors here.
The 4080 is massively more efficient than the 3090. The whole 4000 series in general was a huge step up, the 4090 is twice as efficient as the 3090 in gaming and even better in AI and pro work.
Meanwhile, according to Nvidia's specs, the 5090 is a 32% increase in core count and a 27% increase in TDP. The 5080 is a 10% increase in core count for a 12% increase in TDP.
Unlike the jump from the 3000 series to the 4000 series, the 5000 series does not appear to have a strong increase in efficiency. In fact there might not be any increase in efficiency at all.
That coupled with mediocre raw performance gains likely means that the 4000 series could maintain a lot more of it's value. That lack of efficiency gains in particular is extremely important. Efficiency gains are the basis by which chips continue to scale.
If you are a 4000 series owner I see zero incentive to upgrade unless you own a 4090 and need more performance. For everyone else, you could have upgraded up the stack in the 4000 series and gotten more performance at a similar perf per watt and feature set. You'd only be missing out on multi-frame gen and let's be honest, that's only because Nvidia need to incentivize people to buy the 5000 series. For gamers the 5000 series does not sound appealing. For AI who knows, these cards might have efficiency improvements geared towards that. I know they support FP4 but TBH running AI on FP4 results in pretty low quality.
The more I start looking at the data the more I'm thinking I'll be hanging onto my 4090.
Looks like nVidia is putting all eggs on the "new" enhancements DLSS/ML/AI basket.
Because without those the perf increased about 25-30%.
And guess what... with +25-30% power increase.
0% perf/watt increase without the enhancements at least for 5090 vs 4090 on FarCry 6.
Still impressive GPU though.
Too bad that AIB variants will most likely be sold more like $2500-3000 at least for the first (many?) months. And people will buy them...
The 5090 will probably sell out due to AI uses but I'm not so sure about the rest of the stack. Even the 2000 series had better perf per watt than the prior gen, introduced RT and Tensor cores, and it had mediocre sales. Meanwhile the 5000 series has...multi-frame gen? Converting the NN to Transformers is hardly of note, that takes a bare minimum amount of effort. Without perf per watt improvements you might as well have just purchased one up the stack in the 4000 series, the result appears like it may be the same.
Of course all the above is based on the TDP and core counts but it appears that AMD has a legitimate shot this gen if they don't screw it up (again). AMD needs to close the feature and efficiency gap and outprice Nvidia. I can see the efficiency gap closing given AMD is back on a monolithic die, not sure about the rest.
