This is a little misunderstanding.
"Is Your graphics card X1950 PC flashed?" means PC card flashed with Mac ROM.
Standard PC cards without flashing not works with OF.
But standard PC cards without flashing can work inside Mac with MorphOS or linux - it assumes to have other Mac card for OF.
AmigaOS3: Amiga 1200
AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad