I have further ii´nvestigated this Issue. My CPU (6820) goes up to 12% into thermal throtteling.
The tool i used to test was AIDA64, the same the shared tests reffer to. On BIOS 1.02 the System forced to Shutdown, because of an thermal iussue.
On BIOS 1.06 i have performance degedradtion and throtteling around 6-12% on my System.
It would be helpful if an Dell repesentative could tell us more. I actually think my device has two faults, the display bleed issue and the thermal problem,