This page provided modifications for Dell Lga775 optiplex
series , it only did microcode upgrade and platform type
changes , so it can support LGA771 and Lga775 both.
How to flashing modified bios :
At first ,install "Dell Client Configuration Utility" and launch
it.
It will
opened by the default browser , then load the mod HDR file i
attach , you can also set any settings you want.
Click
"Create Bios Update Package" to built a bios update Execution
file.
Running
this Execution file to update system bios.