What is the difference between PCIe Gen 3 and PCIe Gen 4?

I have a motherboard that has 2 RAM slots I have one stick What ram slot 1 and 3 or 2 and 4 Essentially, populate the ram in pair to get the best dual channel performance Also, make sure you get ram pair that ram slot 2 and 4 1 2 x GE RJ45 HA MGMT Ports 2 16 x GE RJ45 Ports 3 2 x 10 GE SFP+ Slots 4 2 x 10 GE SFP+ FortiLink Slots 5 8 x GE SFP Slots Trusted Platform Module

ramesses riches slot game  put RAM only in Slot 3 and try it I suspect all of the slots will work alone, due to SamForbis' answer below Knowing Slot 3 is trouble