it's more like a your running osx on a dell issue...lol.. it has to do with power management not managing the hardware 100% and osx not responding correctly. you can try nullcpu and sleep enabler to see if it helps your temps a bit.
use kext wizard for kexts and chameleon wizard for chame... install the latest one and in smbios section of chame wiz set your graphics enabler=yes and your resolution... there are different settings to play with to optimize your osx install.
funny thing is in your after edp it has voodoohda loaded and hdaenabler where did that come from. and your before does not. now can you list just the ones in extra extensions. or zip up your extra folder and post it.
lol... much appreciated SS, can you do me a favor and post the dev id for me or post the corrected kext or its plist, whichever is easier for you... theres another user with the same problem on a d630,