sate slotTypes of Slots in Computer – Motherboard Slots Explained. Here are various types of slots you can find in a motherboard on its internal and external sides along with theirSo a gen4 drive in the 3.0SATA slot will be limited to gen3 speeds, as will a gen3 drive in the 4.0 slot. But either will work just fine. So if you get one 3.0 drive, mht as well put it in