Yes, like Hedgemon said, they are removable. If you want to push the voltage up and try for higher clocks (1200Mhz+) you will need something like that Gelid vrm you linked earlier and then use zip ties or something to apply downward pressure on the vrm. This will help to extract the heat quicker vs. something just sitting on top with little to no pressure on them. This would be for the reference card only. Most custom cards should have a memory/vrm plate installed which should be sufficient for the most part.
ALSO - I am extremely jealous you were able to get you G10 already, Mine has been on order since 12/12/13 with NZXT...
Edited by Face2Face - 1/15/14 at 6:57am