Can a PCIe graphics card work on a PCIe slot?

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The greatest advantage of PCIe 4 over PCIe 3 is in its speed — or overall bandwidth Like generations of PCIe before it, PCIe 4 doubles its

It should be backward compatible, but you will see less performance than if you had it in a PCIe slot since it runs at PCIe x8 instead no you can perfectly put a gpu with PCI-E into a newer mobo that supports higher bandwith with ofcourse you won't be using the max

draaiknop slot voordeur A PCIe SSD card can be inserted into a motherboard having PCIe slots use of the greater bandwidth of the Gen 4 slot  You don't need PCIe support to run Nvidia's RTX 3000 series or AMD's Radeon RX 6000 range, and the performance increase isn't as noticeable