Sorry I don't know if this has been asked before: what is the "native" resolution?

[velcrobandits]

I'm currently playing psx and I configured it to get 60 fps which is sweet but after a lot of configuring with a much higher resolution, I couldn't squeeze out any more fps. I guess I could make a topic but w/e. The point is that resolution seems to be a huge determinant, so I wanted to know what the native res was so if I hit a wall I could lower it. Thank you.

[Shadow Lady]

Each PS2 game has a different native resolution, can be small like 512x348 or 640x512 for example, generally not bigger or lower.
Not sure if you actually mean PSX native resolution tho which can be much lower than PS2