Retroarch running games slow on A500 mini

Hi, recently I’ve installed the Pandory mod on my A500 mini and came across some issues playing arcade games. Most of them run at normal speed but some run really slow or have distorted sound.

I’ve been messing around with some options with no result. Things only seem to get worse to where my whole catalog is running slow.

Games in question running slow are: MK1, MK2, MK3, UMK3, Alien vs Predator, Golden Axe: Death Adder’s Revenge and Undercover Cops.

Is there a fix for this or is the A500 mini just too weak to emulate these games at their proper speeds and sound?

Btw, MK1 was running fine before but now it’s running slow as well.

Can anyone please shed some light on this?