Anyone can explain how to use this?An issue has been recently identified with the Velka 5 rev 1.1's card support, which may not work well with all graphics cards and result in some drooping. I am currently working on a solution in the form of a metal support piece that will be ready to ship around late November. If your Velka 5 is expected to ship in late November-early December, a metal piece for this will be included with your case.
Those of you who want this fixed as soon as possible and have access to a 3D printer or a 3D printing service such as 3DHubs or Xometry may download a 3D printable file here and use this 4 mm thick piece to support the IO bracket of the graphics card. It has 8 mm spacing between holes and is designed to be easy to make.