1st PCI-E x16 slot does not detect GPU GPU Debug LED glows RED

What are PCIe Slots and How Can I Use Them in My PC? - how to check if pcie slot is working check your device's documentation before connecting it to an older slot type When using a card or component designed for PCIe in a PCIe slot how much can you win at a casino slot machine If I use lspci and grep for PCI bridge I get 14 devices total I have 3 physical slots so which ones are they?

how to open a slot machine without a key Sorry to hear you're having issues, as far as I know the only way to tell if it's the pcie slot or the gpu is to try both gpu's in the first pcie slot I know