Do not ask Dumb questions about PS2,Game Cube or X-Box emulators !!!!!!!!!!
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HERE IS WHY :
#1. None of the PS2,Game Cube or X-Box emulators fully work at a 100%.
#2. Even if they did you would need a 128-bit computer ( all PC's & Mac's or whatever available to the public are 32-bit or 64-bit: this doesn't get the job done for 128-bit ! )
NOTE: PS2,Game Cube or X-Box consoles are 128-bit !! Therefor your computer must be 128-bit as well as the emulators !!
#3 So until they get these emulators for PS2,Game Cube or X-Box fully working & they make & sell 128-bit computers to the public . Then we all have to wait.
#4 Now why we have PS2,Game Cube or X-Box ISO's is so you can burn them for a REAL CONSOLE WITH A MOD CHIP or when they get PS2,Game Cube or X-Box emulators fully working & they make & sell 128-bit computers to the public .
#5 Why can I play FFX partially on my computer then on PCSX2 ? You ask.
The answer : Your computer is probably 64-bit & you have a really good video card which would make it capable of playing 128-bit game at least partially until it crashes.