Have Asus Prime Z 270 A mb, i7-7700k, Corsair Vengeance LPX DDR4 3000 mhz , 16gb (2-8). I would like to add same brand/kind either 32 or 64 gb kit. Corsair kid says they recommend only installing a kit and removing my existing. Not heavy user mainly home with a few screen using different MS Office Suite and email. Can I safely add or do I have to get rid of existing? Help is appreciated.