Dual channel allows for wider (64 vs 128 bit) memory data bus. The system will downclock them to 1866 mhz and there is nothing you can do about that. 403 Forbidden Motherboard, Gigabyte, Intel Dell told me to put them beside each other, both in just one pair of slots (e.g., #2 and #4). Which two dimm slots to use . If you can only afford 8gb of ram right now and a motherboard with only two dimm slots, it might make more sense to go with a single 8gb stick of ram rather than dual 4gb sticks of ram. Each slot can accept one dimm. There was a time when although 4 dimms was technically supported, getting all 4 to work was a complete crapshoot. I just have the 1x m.2 ssd on the dimm.2 stick (left side), should it be in. I’m wondering which slots my ram should go on gigabyte b450m ds3h. Yes, you can but as others have stated today’s mainstream boards are dual channel and running a third stick would put it in single channel mode which means it would run at half the bandwidth of d...