3 Things to Know About the Dell OptiPlex 3000 Micro’s Lack of Expansion
No internal expansion slots The chassis has no PCIe slots, so you cannot add a dedicated GPU, capture card, or other internal cards.
Limited storage options Only one M.2 slot and one 2.5-inch drive bay are available. There is no room for additional internal drives.
No external expansion support The system does not support external expansion via USB or Thunderbolt, so you cannot add ports or peripherals that way.