scph70012biosv12usa200.bin file is generally considered one of the best and most stable
However, the word "better" is contextual. If you are playing Japanese exclusive games, you need a Japan-region BIOS. If you own a SCPH-50001 (Fat), you cannot use this BIOS because the hardware expects a Deckard IOP. scph70012biosv12usa200bin better
The PS2’s IOP is essentially a modified PS1 CPU. Early BIOS versions had timing errors and incomplete IOP emulation requirements. The (from the slim 70012) contains heavily refined IOP routines. For emulators like PCSX2, this translates to: scph70012biosv12usa200