OK I'll put it a bit simpler: should the independent reviews say that neither the 3080 nor the 6800XT is bandwidth limited, it can become a purchase swinging factor. Not sure it will, but it definitely can.
Independent reviews will tell you what? If it will suffice or not? Nobody knows mate if more vram will be needed with 100% certainty.. Most probably will but not with certainty. But you asked which one will be more
bandwidth limited , which with the literal meaning 6800XT is so much more than 3080.. 6800XT has ~48% less memory bandwidth than 3080 that is 512 vs 760GB/s. Don't confuse memory bandwidth with amount of VRAM they are both equally important and serve complimentary but different purposes.
I didn't read this anywhere it's pure logic and I don't expect avg Joe to care about that.
Thing is all I see in the net is that this X amount of vram is much higher than this Y amount of vram.. Well all I'm saying is that it's not as simple, simply measuring the amount of vram without taking into account the most important thing the memory bandwidth is like measuring the quality of photographic equipment solely on Mp..
And don't expect things to change so easily 10Gb of GDDRx will most probably be just fine at least for the next couple of years. 12 of the same quick memory would have been the sweet spot, 16 is plain waste..AMD didn't put 16Gb of GDDRx it put 16Gb of cheaper and slower GDDR6. If it had put GDDR6x at these amounts the price of it would have been at least the price of 6900XT if not more.
Also keep in mind that in the vast majority of cases even high end cards like 3080,6800XT will face issues with fillrate limitations before they even reach bandwidth limitations.. (this means 9/10 times, games will not have enough performance in their tank for a given modern game @4k before they reach bandwidth limitation.. ). A recent example is Watch Dogs Legion which is averaging 30-32fps @4k without DLSS and with RTX Ultra. It doesn't have any bandwidth limitations though so you get the idea by now I think..
Well, if their target audience were people who actually own a 4k display, that'd be a very-very sad market prognosis for the 3080. So with all due respect, no.
No it will not this is your idea of a poor market prognosis. As I said 12 would have been perfect but 10 will suffice, I own one (3080) I play @4k for more than 5 years now (980Ti SLi, 1080Ti, 2080Ti and now 3080) and let me say I know the perks of this resolution (4k) pretty well by now in a vast array of games, to understand that 10Gb of GDDRx will be enough.
If anything I think 16Gb is to purely impress the avg Joe who thinks that 16>>>>10 so 6800XT will be quicker in memory terms, when as i previously mentioned ,3080 has actually much higher memory bandwidth with 760GB/s while 6800XT has only 512GB/s ..