I've read some posts about this before posting but from what I gathered, it depends on every situation. So, my situation is this. I'm upgrading my kind of old but still powerful PC. Asus X99 Deluxe mobo, i7 5930k processor, 48 GB RAM and I just bought a new Geforce RTX 3060 Ti to up my 3D rendering capabilities. Thing is, I've been suffering from many problems with the PC because there have been many power outages in my area. Recently I found out one of the RAM modules has gone bad and I need to replace it. The mobo has 8 DDR4 slots, 6 are in use with an 8GB DIMM each. All of them 2400 Mhz and with similar voltages. I could just buy one more 8GB and be done with it but I would like to take the chance and upgrade it. I want to buy two 16GB sticks to pair them and was thinking of buying an 8GB also to pair with the one that was left alone. Is this a good idea? I have bought RAM for this system gradually over the years and I remember it being a pain making the mobo recognize every stick. Any guidance here would be greatly appreciated.