Yes, they work perfectly! However, the prerequisite is that you already have the Corsair Vengeance RGB Pro
2x, 16GB, DDR4-3200, DIMM 288 already integrated in the system.

also work perfectly with any other ram non rgb sticks that are compatible with the mobo ;-) the rgb dummies are configurable by icue and default is rainbowbarf as it should be '^ ^ it is definitely not a prerequisite to have already installed a vengance rgb pro kit... it can be combined with all possible ram manufacturers and models