Nvidia RTX Serie Instructions D'installation page 8

5
Remove the existing graphics card if present. If a retention bar is
holding the card in place, remove the screw securing the card. OR,
if there is no existing graphics card, remove the access covers from
the primary x16 PCI Express slot.
The RTX A6000, RTX A5000 and RTX A2000 are
dual-slot GPUs and will require removing two
adjacent slot covers. The RTX A4000, RTX A1000,
and RTX A400 are single slot cards and will only
require a single-slot.