I've heard a few things about people wondering if 10GB is enough, but has anyone had problems with that?
I think I recall people mentioning problems with 11GB with some cards, but wasn't sure if any limitations were encountered with the 3080 (assuming it has better Vram management or something, I'd like to see/know about reports with this card, instead of reports of other cards with the about the same amount of VRAM)
I know there's only a limited amount of people with 3080 cards atm, but if anyone has encountered problems, or tried to push the VRAM usage as high as possible, to post what the results were.

Nope, none..
 
The 2080Ti has 11 GB so 10GB is really fine....

You probably won't have much problems from a gaming perspective. Most games even running on 4k uses around 8gb of vram on the top end. This may change as more games start using higher quality 4k textures, or if you start modding games with 4k textures you might start to exceed that. For at least the immediate future, you should have no problems. The heaviest game i run is rdr2 on everything maxed out and that is about 8.5 gb.

New games could also tax the GPU itself more than current games and you end up running out of GPU "horsepower" before you run out of vram. 
 
Every graphics card I have owned has ran out of GPU grunt before vram. My 1080Ti only uses 7.2gb of vram when I max out my favorite sim on my Reverb. -And the game is absolutely unplayable at around 29 FPS! Once I turn down the settings to where I can hold 90 FPS, I'm only using about half of the 1080Ti's available vram.
 
At some point in the future, the mighty 3080 will not be "enough". The 10gb vram buffer might make running out of vram more likely than it has been for previous generations, but I still don't think it will be the most likely reason for "needing" an upgrade. My 1080Ti has come up short of GPU power in 100% of the games I have needed to turn down settings. Maybe the 3080 will end up with a game or two that run out of vram in a couple years, but I bet the list of games that just simply bring the GPU to its knees is still much longer than those that max out the vram.

no issues playing recent AAA games in 4k120. I dont think 10gb will be a problem, most games preallocate the vram they expect to use based on settings.

 I've exceeded that in 2 games I'm currently playing: Wolfenstein: Youngblood and Grand Theft Auto V. Once I get to about 9.8GB's of V-Ram used, FPS drops like crazy and the screen looks like a flip book. I have to drop a setting or 2 to keep it under 9.8GB's used.
 
Bottom line is that if you game at 4k and want to max most or all settings, then 10GB is not enough. V-RAM gets eaten up like it's nothing at high resolution with max settings. And thanks to the 450w BIOS for the FTW3, you can stay over 60 FPS in most games and are limited only by the 10GB's of V-RAM.

what settings are you running for gta V? i have had no issues at 4k120

notarjy
what settings are you running for gta V? i have had no issues at 4k120

As I specifically said, if you're aiming for maxing most or all settings at 4k, then V-RAM is the limiting factor.
Of course you can turn down settings to avoid exceeding the V-RAM limit at 10GB's. You're kind of missing the point, though. And that is 10GB of V-RAM is limiting the FTW3 3080 at 4k with most or all settings maxed.
 
 

Well I ask because I am also running fully max settings. Even then I did not have any issues with vram or slow down.

Monster hunter world with its high res texture pack on 1440p used up 10.7gb on my 2080ti.
 
I tried using 34x14 res on a different PC with a 2080 card and it exceeded its 8gb vram.
 
Both maxed out settings.