P8Z77-V LE | AMD R9 280X | i5 3450

[GamingStation]

I have an huuuuuge problem...

I can boot from the USB Stick without any flag, but the Graphics are terrible.
After installing Yosemite on my HDD, i only can boot with -x.

So now can anyone help me what should i do to boot with working Graphics Support of my AMD R9 280X....

I want to boot without -x.

 

[WinMacRebel]

I have an huuuuuge problem...

I can boot from the USB Stick without any flag, but the Graphics are terrible.
After installing Yosemite on my HDD, i only can boot with -x.

So now can anyone help me what should i do to boot with working Graphics Support of my AMD R9 280X....

I want to boot without -x.

when i enter safe mode -x my graphics are also terrible. to get into OS X without -x you probably need an smbios and ssdt for ivy bridge. I did this for mavericks and now now for yosemite but i have problems with the audio not working even with the drivers from multibeast.. and HW Monitor not reading my sandy bridge processor

i have a p8z77-v and now i have a lot to figure out to fix

did you have mavericks installed prior to yosemite?

 

[GamingStation]

I had an GTX 560 with Mavericks before. This build worked perfect. But now