The EE overclock works the same way as the current EE cycle rate hack(Which is EE underclock) except in reverse. I modified the slider to be able to both increase and decrease the effective EE clock speed(and of course the code that the slider controls as well). Here is a video I made proving it works. It uses SNES Station for PS2, running in PCSX2, which doesn't run at full FPS in PCSX2/on PS2 normally and skips frames. Once the EE clock is increased, it goes to 60/60
But in case anyone was thinking of asking for a build, there are several reasons I'm not making them.
#1 I did this on my own, without dev input, so it's completely unofficial
#2 It only helps a small handful of games that meet these criteria
- They are not FPS capped/They run below their FPS cap
- They are EE bound
#3 The system requirements increase is MASSIVE. I made a comparison in one game. Standard EE clock: 200% speed. 33% EE increase: 100% speed. 50% EE increase: 50% speed
#4 Even in the games it helps, it's only a TINY amount. 5 in-game FPS at most.
But to answer hellbringer's question, it is highly compatible. We've only found one game it causes actual issues with.