RTX 4090 into PCIe x8 slot

A PCI slot is a built-in slot on a device that allows for the attachment of various hardware components such as network cards, modems, sound

One extremely common use of PCIe slots is upgrading or adding new local storage Mounting an SSD on your motherboard through a PCIe connection

which expansion slot is used by an nvme compliant device_ But when the card is horizontal and PCB parallel to the ground, that would put a strain on the card, and the PCI slot bracket Like

which slot machines pay the best Which means I'd have the first expansion slot free on the Z840 motherboard, and could use it for an UI-only GPU card (yeah, it's just x4