slot16Image: A typical x16 slot. The PCIe x16 is the largest slot found on a motherboard.. A proper x16 slot with 16 lanes measures 89 mm in length and has 82 pins, each serving a purpose, such as providing power and transferringSometimes mixing RAM can cause things to behave strange. If you are going to mix the RAM, at least put the 16 GB sticks in the corresponding slots (0 and 2) and the 8 GB in