What does '1 x PCIe® x16 ' mean on a motherboard

1 x pcie 4 0 x16 slot   Dan 11bola slot

Expansion Slots, 4 x PCIe x16 , support x16; x16x16; x16x8x8 and x8x8x8x8 configurations 1 x PCIe x4 1 x PCI Multi-GPU Support, Support NVIDIA 3

However the same physical connector can be used for x1, x4, x8 and x16 In many server class motherboards you will find slots which physically PCIe is backwards compatible to the previous generations A PCIe Gen 2 card will work an a Gen 4 slot at Gen 2 speeds However, 4 PCIe lanes

gold stacks slot machine 2 slots with x4 PCIE lanes each  A lot of budget motherboards, having a x16x8x4 and 3x x1 slots, actually don't handle over 4 GPUs Even if you somehow could run the first GPU