No fix for the moment, all depends on the game size, DC games eat into the 2gb space quick
Ploggy one more thing... seems everything works by adding space in Localstate folder besides gamecube games. When i first run super smash bros melle it works ok, then i decided to try mario party 5. before i play it i deleted ssbm from local state. But when i ran mario party i got black screen and only audio is emulated, after that every gamecube game act like this... Maybe is core related issue but in other build of retroarch i don't remember to have that problem.