Question

You need to upgrade memory in a system but you don't have the motherboard documentation available. you open the case and notice that the board has four dimm slots; three slots are colored yellow and one slot is black. what type of dimm does the board likely use? how can you be sure?

Answer 1

The three yellow slots proably indicate triple channeling, which means the board uses DDR3 DIMMA. To know for sure, remove a DIMM and look for the position of the notch on the DIMM.