10 Screws on bottom and scph 3000X is version 1 to 3.
8 Screws on bottom and SCPH 30003R is version 4 unless you have the extra countersunk screw on the top edge of your expansion port ( making 3 screws in total on top edge). If you have 3rd screw it's a version 5.
SCPH 3900X is version 6/7.
SCPH 5000X is version 9.
See
HERE!!! for more info....
Regards