People still have expectation in line with pre Nov 3 info release and don't have an objective view of market conditions and pricing.
The 7800xt performance is going to be very close to the 6950xt's or 6900's. the 1.54 performance per watt shows this. With the small size of navi 32, AMD will have to be very careful about heat and clocks since the die is so small so heat transfer will be inefficient.
If this card is 3ghz but emitting 300 watts from a 200mm2, your going to have a chip with terrible minimums as the card thermal throttles with nothing short of water on top. Memory and a moderately clocked memory controller are relatively cool which is why they can be cooled passively. Pure logic is hot and AMD is packing it altogether tighter than ever.
A 700 dollar 6800xt has the same pitfalls as a 1200 rtx 4080, but without the criticism because of the bias in this thread. A small chip being upmarketed and up priced.
Remember the 5700xt was 399 and the 6700xt was 480 with the latter being up priced as a result of being launched in the middle of the mining boom.
This card should be priced at 499 considering there is only 200mm of 5nm chip there. The rest of it is cheap 6nm. Add this with the AMD brand and this should be 499 much like how the RTX 4080 should be priced more along the lines of 799.
The math says otherwise.
On the updated AMD info the 7900XTX is 54% faster than a 6950XT and the 7900XT is 30% faster.
Using this chart that would put the 7900XTX at 131 fps and the 7900XT at 111 fps.
That would mean 7900XTX is $7.63 / frame and the 7900XT is $8.1 per frame.
To match the XTX $/frame a $700 7800XT would need 92fps so 3090Ti performance. Usually though the $/frame improves as you go down a stack so I could see it be as low as $7/frame which would put it at 100fps on this chart.
It might seem very close to the 7900XT in terms of performance but AMD are already not pricing the 7900XT in line with the XTX so I don't think AMD are worried about a lower tier part hurting 7900XT sales. I mean between now and the 7800XT launch AMD can adjust the price of the 7900XT to make it line up better in the perf/$ charts.
I would also say that anything much below 100 fps would feel like a lacklustre increase from the 6800XT. Matching the 3090Ti would just be a 30% improvement over the 6800XT which is not great.
The other angle you can look at it from is that the 7900XT with 84CUs and a slight clock regression vs the 6900XT is going to have around 38% more performance. A 7800XT with 60CUs but 40% higher clocks than a 6800 should quite comfortably offer a 60% gain over it which also puts it at 100fps in the above chart.
So I think that at worst the 7800XT will match the perf/$ of the 7900XTX which means 3090Ti as a low end. At best I can see it offering a ~10% value advantage at the cost of not hitting that 4k120 threshold the XTX does which would put it at around 100fps. Of course the 3rd option is that it does perform like a 3090Ti but AMD keep the $650 price point rather than pushing it to $700.
So really I guess I am saying that I expect between 3090Ti level performance and 3090Ti + 10% with a price between $650 - $700 to keep it the right side of the perf/$ curve set by the 7900XTX.