Powercase :
Im talking about vrams on gpu(http://i.imgur.com/FHUAH75.png) i my case its on the pcb because its from my laptop but anyway i already use thermal grease on then just the connection does not loot good and i want to use thermal pads instead i ordered 1mm thick pads but im not sure if its going to be enough so back to my question.
Oh, I thought you meant the VRMs on the motherboard, the pads should be plenty enough, I wouldnt really use grease on those either to be honest, whenever I have swapped graphics card coolers, its always been advised to use pads on the memory and grease only on the core, same thing really.