I don't think you can reasonably expect to play a AAA 2015 title with 1GB VRAM. The technology has moved on beyond even 2GB at this point so a 1GB is a relic. It's like complaining that modern software runs slow on your Athlon 3800 with 1GB RAM.
my intention was just to share my findings which seem to be the same psolord was doing and we basically saw the same thing, not really complaining,
are you really comparing an old single core CPU with 1GB of ram to graphics cards with 1GB of ram and capable enough GPUs?
NV and AMD are still selling gaming capable 1GB cards like the 750 and 260X 1GB models, no to mention the 7850 1GB which is as fast as the PS4 GPU, and the many thousands of people still running capable DX11 cards like the 560s, 570s, 6800s playing new games.
as I mentioned, the other "AAA" titles I tried played fine with 1GB (witcher 3, project cars, battlefront beta, dragon age inquisition and so on), and the behavior I described is "odd" to say the least all the other games seemed to be happy to load all or most of the vram, and with some compromises to image quality ran smoothly, I think Bethesda could improve things with a patch, but I understand that their focus is not on this side of things (consoles and 2GB cards is their target and they also have a lot of work to do there, if they intend to support their product properly),
oh with my computer (Athlon X2 7850 dual core 3Ghz, HD5770 at 1000Mhz, Res = 1440*900 , 6GB DDR2 800) I was able to play Crysis 3 , at lowest setting , very smooth.now I can't play Fo4?
whoa!!! what kind of game Engine is? No low texture ???
indoors I think the GPU performance will be a big limiting factor even with the lowest settings, but the worst part will be the vram for sure.
also a dual core like this one will probably drop it under 15FPS on some areas, so, I suppose you could try and play it, but it's probably best to wait and hope for some optimization patches (unlikely, but for skyrim for example some patch greatly improved CPU performance by adding SSE support after a few months, I think they can fix the vram usage if they want to) or plan an upgrade.