When I built my pc I bought 16gb (2x8) of ram. For the Christmas season I decided to gift myself 32gb (2x16). Both sets are ddr4 and run at 3200mt/s but are of different brands. Is it okay to put them in the other two ram slots or should I replace the old ones?
As long as they are exactly the same spec, it should be fine. It’s generally just easier to make sure they are exactly the same by getting 2 or more of the same exact thing from the same brand.