Yes, a game would run faster with a lower res, and also, a high res, affect the frame rate of a game if your computer isn't fast enough (<1~1.6GHz).
However, it also affects the appearance of certain games (e.g Chrono Cross), where the backdrop doesn't seem proportional to the PSX native res.
Check out Kane's Domain for details.
However, it also affects the appearance of certain games (e.g Chrono Cross), where the backdrop doesn't seem proportional to the PSX native res.
Check out Kane's Domain for details.