In regards to your machine. Would to be so kind as to tell me your install method and setup step by step to get 10.8.2 running without any issues? I'm running 10.8 and have everything working except as you can see in the posts below I cannot boot the machine by itself. Have to boot off Chameleon OS X flash drive and then select the HDD. Boots fine then but without that flash I cannot boot the machine. V frustrating. Thanks!
I'll try to summarize from what I remember what I did, hopefully it can help:
1. Prepared the USB 2.0 drive with 10.8.2 & Unibeast. Also had MultiBeast downloaded to this USB key, along with the DSDT from the database because I wanted HDMI audio.
2. My system had only the i3-3225, 2x4GB RAM DIMM, 1 HDD connected to the first SATA port, USB keyboard & mouse. Display connected to the bottom HDMI port.
3. In the BIOS, load optimized defaults.
4. In the BIOS, set Enable Extreme Memory Profile (X.M.P.) to profile 1 (else my memory was underclocked, but the system worked with both settings).
5. Save and exit BIOS (you might want to adjust the VT-d setting; my CPU does not support it so it is automatically disabled for me).
6. Hit F12 and select the USB drive to boot.
7. In the boot loader, selected the UniBeast (don't remember exact name) partition.
7. Once the installer is booted, went to Disk Utility to partition my hard drive, making sure the partition table scheme was set to GUID via the options button, and the file system was Mac OS Extended (Journaled). I don't recommend using case-sensitive FS since some apps don't expect it and can cause some odd issues.
8. Quit the Disk Utility to go back to the installer.
9. Proceed with the installation.
10. Once the system reboots, hit F12 again to select the USB drive;
11. In the boot loader menu, select your newly installed OSX partition on your hard drive; I might have needed to type -x for the boot to complete at this point.
12. Proceed with the new computer & user setup wizard, skipping the registration.
13. Accessing the USB drive, copied the DSDT file to my desktop without renaming it (so it still has the same name as downloaded from the database and is longer than DSDT.aml).
14. Ran MultiBeast selecting the hard drive system partition as the installation target and used the exact same settings as in post #1 in the screenshot "with DSDT".
15. This will pop up the Linux2Mac network driver installation wizard, which you also need to complete at this point.
16. Once the Linux2Mac installation is completed, you will be prompted to reboot.
At this point I could boot to the hard drive without the USB and the system worked OK (some wake-from-sleep issues but this aside, it was working great). Once you are at this point (i.e. booting system that you use used a a while to make sure everything appears to work ok), you can begin to connect other hardware. Always best to start with a minimal setup, make it work, and add extra hardware one by one so you know which piece is causing problems.
I left out the 2 TB and larger hard drive boot fix that I had to do to make the system work, but I did it as a final step.
Hopefully you can use this info as a rough guide to get your system running ok. Good luck!
edit: step 2: specified how my display was connected.