These are 2x 0 GB RAM bars. Let's say you have 4 RAM slots, but have only filled 2 so far. Now you think this looks stupid and you would like to fill the empty slots as well, but you don't need any additional RAM. Then these dummy bars are the right thing. These also have RGB, so they are indistinguishable from the "real" Corsair Vengeance bars. This product is therefore purely cosmetic / optical in nature and serves no technical purpose.