There are news in a positive direction that nvidia tunes the specs of the new GPUs so that the new TDP is lower now, while the shaders are more.
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NVIDIA GeForce RTX 4090/4080/4070 get new rumored specs, RTX 4070 with 7168 cores and 10GB 160-bit memory? - VideoCardz.com
Look at how the AD102 gets more shaders - up from 16 128 to 16 384 and TDP is rated ~450 watts.
The bad news is that the 10 GB RTX 4070 will be DOA.
There is no chance in hell 4080 reference model being AD103 based to have 420W TBP, so the above table is horseshit imo.
If it comes true 4080 will be DOA and whoever responsible in Nvidia must be fired immediately imo.
I suppose they just subtracted 30W from 4090 because they thought 30W is the 3090-3080 difference, that's my guess.
Regarding 4070 if it's 10GB like they say, it will be a very bad development, the design will be probably bandwidth limited logically unless they use 24Gbps GDDR6X which isn't happening (with 56SMs present there won't be a ROP cut) and regardless bandwidth limitations or not, 10GB at $499-$599 price range in 2022 is inexcusable, there is a limit where the cost-cutting measures isn't tolerable anymore.
If we were talking about a cut down AD104 version at $399-$449, replacing 3060Ti, OK maybe right on the edge of what seems acceptable memory wise.
I hope Nvidia to not be so greedy, wanting to impose unnecessary limits in order to force earlier upgrade cycles...
Edit: depending on the price of Navi33 and if there will be 16GB versions or not (probably not?) maybe someone at Nvidia thought they can get away with 10GB, I hope eventually in the future Intel ARC's next-gen series (Battle mage etc) to be competitive in more price ranges, because we need more competition to revigorate the market.
Another occurrence if they use 160bit bus is that they will pair it with GDDR6X probably resulting the raster performance/W vs 3070 to be in the most positive scenario up to 30% regarding this specific comparison (4070-3070) which will be a huge fail based on the process differences.