i know this ram works well with the ds3
http://www.overclockers.co.uk/showproduct.php?prodid=MY-058-GL&groupid=701&catid=8&subcat=813
if you check the bundles on www.overclockers.co.uk they sell the ds3 with ram that is known to be compatible
i also have this ram and its working great with my DS4 mobo
it had no problems at 1.8v getting into the bios , i set it to 2.1V and left it there ever since
i read also that the ram compatibility issues with the gigabyte boards where cleared up after bios F3.
i bought mine on 1st of Jan 2007 and mine shipped with F5 already installed. so you should be fine