I never have put any in a freezer. I just stick a plastic card in between the heatsink to protect the video card, and place a straight edge screwdriver under the corner of the heatsink, and give the screwdriver a firm twist. I have done a lot of video cards that way, and have not broken one yet. Just be careful, and watch what you are doing. I take no responsibility if you break your card. I am just letting you know how I do it.