V 5/6: The model numbers can be SCPH-30001 R, SCPH-35001 R, SCPH-30001 R, SCPH-30002 R, and so on. Whatever the model number is, it must have the R after the model number.

V 7: If your model# is SCPH-39000, 39001, 39002, 39003, 39004 or 37000 you have a V7 PS2 main board. Witch is also compatable with this chip!