CompTIA A+ Question D-32 Which of the following expansion slots is characterized by having an x16 speed? A. CNRB. PCIC. PCIeD. AGP Show Answer Correct Answer: C Explanation:The PCIe xXX is the amount of lanes the slot has. so x16 has 16 lanes, x8 has 8 lanes and so on. The physical slot on x4, x8, and x16 are all the same.