CPS3 games are WIP emulated only but do nothin.
As always you can download the unemulated roms, but for CPS3 to work they need to be decrypted (This has not been done yet)
Info from one of my fave Arcade emu sites
Unmamed:-
The CPS3 system used a CD and a cartridge.
Why it's not emulated (Santeri Saarimaa)
Nobody has cracked the encryption, plus there is no certainty of what the main CPU is (but this would be rather simple to figure out if the encryption was broken).
From WHATSNEW.TXT:
This will never work (encryption etc.) MAME driver does NOTHING, for reference only.
(Unmamed would also list an alternative emu to use if there was one but there isn't)
From the MAME Compat list
|____________________________|_______|_Correct|_ _ __ _| Screen |Internal
| Game Name_________________ | Working|_Colors_|_Sound_|__Flip__|Name
| Street Fighter III - New Generati|___No__|__Yes__|___No__|__Yes__|sfiii
| Street Fighter III 2nd Impact - G|___No__|__Yes__|___No__|__Yes__|sfiii2
| Street Fighter III 3rd Strike - __ |___No__|__Yes__|___No__|__Yes__|sfiii3