As the title says, I am getting super choppy framerate and lag after a while of playing and sometimes it'll crash into an unexpected error (1) for no reason. My PC isn't slowing down at all and FFXIV is the only program that seems to be affected. For some reason, this seems to happen when FFXIV gets to around 1.6GB of RAM used when looking in my Task Manager.

I'm running a 660TI with most recent drivers, an i5-3570 and 8GB RAM. I'm running low-medium settings on DX9 as I've always done since 2.0 but I've never had a problem with the game like this ever prior Stormblood.

And it's not a RAM issue because I have more than enough left over to run even when FFXIV is taking up 1.6GB.