
It might sound stupid, but, is that probably the reason some games run at poor fps?
So, I recently bought my first PS2 (a slim 79000) and it came with a "OPL kit" - memory card and a SanDisk microSD, which was read by a sort of MX4SIO thing already plugged.
However, I realized that my games (especially Bully) were running way worse than I would expect, and decided to take a closer look at my "memory card to microSD" thing.
I then realized that it was basically a usual memory card - from 2014 - modded (probably by its past owner) to be a microSD reader.
My question is: if I replace it with a original MX4SIO (which seems to be the most reliable option for sd cards), will it most likely solve my performance issues or it can be another thing?