mainboard

I was wondering if it is possible to upgrade ram on fat models. fat model mainboards do have quad rams and newer slim consoles have dual rams, but doubled size. quad ram ist 4x 64mb and dual is 2x 128mb. looks like both have 104pin bga. wouldnt it be possible to put 4 128mb ramchips from slim...

EDIT 2018/08/25: v0.833 released - http://www.psx-place.com/threads/playstation-2-identification-tool.199/#post-135664 EDIT 2018/07/04: v0.832 re-released - http://www.psx-place.com/threads/playstation-2-identification-tool.199/#post-129233 EDIT 2018/06/28: v0.832 released -...