Why does my Task Manager show i have 4 open RAM slots?

How Can I Check If a Memory Slot Is Faulty? & Upgrade ram slot 2 and 4 Should RAM be in 1 and 3 or 2 and 4? There is no difference in speed between these two pairs, but it is often suggested that slots 2 and 4 ram slot 1 and 3 or 2 and 4 DIMM slots are numbered sequentially for each processor DIMM slot locations

ram not detected in slot 2 It means that the colored pair is a dual channel set and that you should install RAM as a pair to take advantage of it You should install 2 of