GPU: Asus HD5450 2 GB (works)
Mainboard: MSI 970A-G43
Bootflags: GraphicsEnabler=Yes npci=0x2000
It only works for 5 - 6 min. and then It says "You need to restart your Computer..."
Do I need another kernel? In 10.7.5 my ATI HD5450 is very slow.
Solved: I had to delete JMicronATA.kext