A video i put together of me running my GT3 PS2 disc straight from my DVD drive at solid 50FPS and 2x native res, it can handle 4x and higher but video ram fills at the start of races causing major slow down until it flushes, it's PCSX2 caching everything, this does not happen at 2x native.
He's using PCSX2, as the title of the thread stated. It's the best, if not the only, PS2 emulator for PC.
@overpoweredtea I've tried FF XII recently (on W8.1, not W10) and didn't notice any major performance improvements since years ago. One good thing is the menu fix but other than that I'm still getting solid performance and a bit of a weird rendering of the portals on the minimap. With speedhacks was even working on an Nvidia 8500GT with 512MB DDR2 ram.