Optiplex 755 information | DELL Technologies
The Optiplex 760 can support full height and any graphic card that works with with a PCI rxpress x16 slot. The 760 uses a card riser which plugs in on the PCI express slot on the motherboard and has an extension PCI express slot on it.
What is PCI Express? Do PCIe lanes, slots, and versions matter?
While you can install any PCI Express card in any size PCI Express slot, you should match the type of card with the type of slot, for example by installing a PCI Express x8 card in a PCI Express x8 slot.
Power delivery difference between PCI-E 1X, 4X, and 16x | [H]ard ...
Slot PCI Express (Partendo dall'alto: x4, x16, x1 e x16), comparati ad uno slot PCI tradizionale a 32 bit (ultimo in basso), in una DFI LanParty nF4 SLI-DR.