the only thing you want to be concerned with is idle vcore and then load vore...what is set in the bios and what is displayed in PC Health section is not droop...it is a calibration problem with the bios code...i have about 0.04 difference between set bios vcore and what bios PC Health says is my current vcore...PC Health is not reporting the vcore accurately...even CpuZ vcore readout is not accurate as i read it from my DMM on the X48 board....AND...don't count on 'Easy Tune 5 Pro" PC Health readout.
EDIT:...the Gigabyte X48 board has about the same difference in loadline calibration as your asus...i think i measure about 0.020 to 0.025 difference between idle and load.
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