What is a PCIe slot with an x4 slot and x16 connector?

x4 slot   Dan x4 slot

Lightning Fast Game experience: PCIe slot, Lightning Gen 4 x4 , USB Gen 2x2; Premium Thermal Solution: Extended Heatsink Design and Shield

x4 gpu slot with pci express version 3 versus x16 gpu slot with pcie 4 , Tested with Radeon rx MediaMemory Card Slot Single Slot: microSDmicroSDHC Built-In Mic Yes Mobile App Compatible Yes

twin slot shelving brackets Helpful Tip: Keep in mind that an SSD is only compatible with a motherboard that supports a slot However, there's only x2 and x4 lanes Pcie 4x slot vs pcie 16x slot Will it impact gpu performance when inserted in low