However, you do not have access to the motherboard documentation and hence cannot increase the memory in your system. The board has four DIMM slots, three of which are yellow and one which is black....

However, you do not have access to the motherboard documentation and hence cannot increase the memory in your system. The board has four DIMM slots, three of which are yellow and one which is black. When you open the case, you discover that three of the DIMM slots are yellow and one is black. What sort of DIMM is most likely to be used by the board? What makes you think you're in the clear?