hello
that card u have, is used in that mac models
about the framebuffer problem that is insert in boot
to any ati card work, like i said in topic
must be loaded
atixxxxcontroller
atiradeonx000x
atisuport
and if insert in boot AiConfig=framebuffer
it load atiframebuffer
must post what kext are loaded
use in terminal
kextstat
and see about ati kext are load
good hack