Motherboard is Asus P8H77 M-LE with i7-3770. ML 10.8.4 on latest Chameleon Release, SMBios 6,2.
I have been through a lot of tutorials from this site and others on how to enable QE/CI on intel hd 4000 graphics card.
1. tried the AAPL inject method as mentioned from the first page of this website - no go
2. tried the already identified hex strings from this and other sites - no go
3. tried generating my own hex string using gfxutil - no go
4. DSDT patching - i can't make head and tails of what i'm doing, so that's a no go also.
I am attaching a DSDT which was extracted from my Windows 7 installation as per tutorials, if that helps.
what I have noticed was that the device ID was changing from 166 to 162 (should be 162 as reported by device manager in Windows).