I have finally purchased my components for my new audio production rig:
Mobo: Asus x99 Deluxe - I have just updated the bios to latest version - 1601
Ram: Corsair Vengeance 16 Gb 4x4Gb 2666 Mhz
PSU: Corsair Ax1200i
Case: Corsair Obsidian 750D
CPU cooler: Fractal Design S36
SSD Samsung 850 EVO 250 Gb
Graphics: either an old Nvidia 9600 Gt or an even older 8600 Gt - they work perfectly on my x58a build in Mountain Lion and Yosemite.
Installed windows on the ssd drive just to make sure that everything works fine.
I had an older clean Hdd with a beasted Yosemite install on it - inserted it, used all the flags that I have found around with no succes - stuck on the PCI ROOT error.
Created several Yosemite USB stick installers, using Rampage Dev Method.
In bios, when I disable CSM, I got a warning and when I try to boot I get this error, with both Nvidia 8600 GTS and 9600 GT in slot pci 1 (even though they both work on my x58a build): "The Vga card is not supported by UEFI driver" CSM have been changed for better compatibility. - it re-enables itself at the next reboot. The "Other Os" remains selected, though. - see Pic 1
If i continue with booting from the usb stick, I got the graphics from pic2 & pic3. Pressing enter or spacebar on any of the verbose or boot without cache variants give me the "Error loading kernel cache error. Boot Failed sleeping for 10 seconds before exiting" error, as seen in pic 4.
Trying to boot from the ##### Yosemite installation done on my x58a rig just hangs at the apple logo.
Please help, I can't figure out what should I do next. Thank you so much for your time!