PPSSPP keeps crashing my graphics card

[keldarr]

same in certin parts of lets say the game starocean first departure the grafic card crashes when i get to the part when you go on the first patroll same spot every time and im not as advanced as most people on this site so have no clue how to stop this i tryed changing it to direct3d it works but things dissapear and som text is gon and on other games it makes it lag so bad that i cant play them like psp2 literal stop and go buffering on a 1 second tick
any help would be great most of the games i want to play i cant
card info i have a amd radeon hd 6450 direct3d version 7.14.10.0825 opengl version
6.14.10.1066