Use any tweaking utility of your preference of course. We use AB, AfterBurner. If you cannot wait for a new AB release and need some voltage control, here's a tip:

Go to c:\Program Files (x86)\MSI AfterBurner\
Open MSIAfterburner.oem2 in a text editor and add the card to third party database yourself and save
[VEN_10DE&DEV_1B06&SUBSYS_120F10DE&REV_??]
VDDC_Generic_Detection = 1
You will notice the part colored in red, the Subsys_ID. This can change per BIOS/Brand. In AfterBurner just click the 'I' (information) button, to read out your proper string and replace the red part with what is listed under the information button (if it differs).
Afterburner select third party voltage control mode in properties and adding the following will do the trick.
In this screenshot you can see the entire procedure which is less then 30 seconds work.