hardware – Is it possible to install a GPU in an HPE ProLiant DL180 G6 server?

I have an HPE ProLiant DL180 G6 server where I would like to install an old Radeon HD 7770 GPU.

Here’s a picture of the server taken from above:

https://i.imgur.com/e1xcjjG.jpg.

The server came with two PCIe risers; one is used for an HBA, the other provides two PCIe slots (I assume both are x8, and one of them is used by an NVMe-to-PCIe adapter).

The GPU would then be installed in the free slot on the second PCIe riser, in the lower right corner of the chassis.

Here’s a couple of pictures of the location where the GPU would be installed:

View post on imgur.com

View post on imgur.com

I have the following questions:

  1. The GPU must be powered with a 6-pin connector
    (https://i.imgur.com/0i3j8ge.jpg),
    but the only spare cable that comes from the PSU is a CD power cable
    (https://i.imgur.com/nVLPbEk.jpeg).

    Is there an adaptor that I can buy to power the GPU?

    If not, since the server allows for two PSUs (and currently only one
    is installed), can I buy a second PSU to power only the GPU?

  2. The second PCIe riser is surrounded by a metallic cage, which would
    prevent me from installing the GPU. Would it be possible or dangerous
    to completely remove it? It seems to serve as a physical supports for the PCIe risers.

  3. If I’m not mistaken, the GPU would be installed on a PCIe 2.0 x8 slot. Would performance
    suffer a lot from this, especially if in the future I changed it with a modern GPU?