I've watched some videos of people disassembling their laptops to add more RAM. And in the process I always came across these RAM bars that have such a gray plate stuck on both sides. I checked and my already installed latch also has these panels in front of and behind the latch. The bar that I bought new to expand my RAM, however, does not have such plates sticking on both sides. Is that somehow important for them to work?
Should be a cooling
Is a cooling. If your RAM does not have 4000 MHz, cooling is not necessary.