In theory only
no because there is not a working emulator for PS3 games and current PCs could not run it if it was developed
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The PS3 has an emulator that lets it play most PS1 games Some early models with 4 USB ports had hardware and sometimes Partially software Based Emulators to play PS2 games
ps3 emulator emulates, copies the function of the ps3 games on your computer, if you have the roms of the game. Till now there are no emulators for ps3, but PS2, there are three of'em, PS2emu, NeutrinoSX2 (not recommended for commercial games) & PCSX2 (highly recommended). Quote from Wikipedia on PCSX2 "several games have full functionality" not quite what the PS2 does is it. see related link to see how worthless the emulator is when the alternative is buying a PS2 for less than $100. no wonder there is no PS3 emulator
A PS3 can play PS3 games and some Playstation games
a PS3 can Play PS3 Games
The PS3 will not play Nintendo or Xbox games