Do I have a version 3?

It is very easy to tell if you have a version 3, flip your PS2 over and count the number of screws on the bottom, they will be under little plastic/rubber covers.

If you find 10 screws then it's a version 3, and the only chip that is available for your PS2 is the F-14 modchip.

If you find 8 screws then it could be either a version 4 / 5 / 6 / 7 / 8 / 9

Do I have a version 4?

The easiest way to establish if you have one of these is to take the expansion bay cover out of the back and look at it:

Usually if your expansion bay cover has metal in it, like the one at the top then its a version 4. If its made entirely of plastic, like the one on the bottom, then its either a version 5 / 6 / 7 / 8

Another way to check is to have a look inside the expansion bay, if you find a screw like the one arrowed then you do not have a version 4.

Look for the model number beginning with SCPH- on the back of your PS2

Version 4's can be SCPH-30000, SCPH-30001, SCPH-35001, SCPH-30002, SCPH-35002, SCPH-30003, SCPH-30003 R, SCPH-35003, SCPH-30004, SCPH-35004

Do I have a version 5 or 6 ?

For a Version 5 or 6 the model numbers can be SCPH-30000R, SCPH-30001 R, SCPH-30002 R, SCPH-30003 R, SCPH-30004 R, SCPH-30006 R
But also some SCPH-30000, SCPH-30001, SCPH-30002, SCPH-30003 and SCPH-30004 PS2 have a V5/V6 main board

Do I have a version 7 or 8 ?

Version 7 or 8 have the model numbers SCPH-39000, SCPH-39001, SCPH-39002, SCPH-39003, SCPH-39004 or SCPH-37000

Do I have a version 9 ?

For a version 9 the model number is SCPH-5000x (where x is any number from 0 to 9).

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