None of the Macintosh 630 family computers provide onboard video support for the Apple Portrait Display. In order to support the Apple Portrait Display you need a separate display card. The Macintosh 630 family computers have an LC style PDS, so Apple's Portrait Display Card will not work in this computer. However, if a third party video card supports the LC style PDS and the Portrait Display, it should work.
The Portrait Display resolution is 640 pixels horizontal by 870 pixels vertical.
The following computers are in the Macintosh 630 family: Performa 630, Performa 635, Performa 636, Performa 637, Performa 638, LC 630, and Quadra 630.