Because v1.7.0 uses the "Qt" interface, the steps are streamlined: : Launch the pcsx2-qt.exe executable.
This is the most important section of this article. pcsx2 170 bios
However, with these improvements comes a stricter BIOS verification process. Version 1.7.0 is more sensitive to corrupted, incomplete, or mismatched BIOS files than its predecessor. Because v1