Selectadock III Graphics Card Compatibility

[NineVolcanic]

Hello I have a question:

I currently have a Selectadock III setup with my 770X. From what I gathered in my research, the best possible graphics card to use is a Voodoo 5 5500 which I have. However, it doesn't seem like it fits. Apologies if this is a novice question but I'm unsure if what I read is incorrect or if there is a step I'm missing. Is it possible to fit one of these in?

[panips]

SelectaDock III supports PCI version Voodoo 5 5500 which is rare, I'm afraid yours is AGP version.
You can take a look at your card and check if there is an "L" shape without gold finger, if so, it's a common AGP version.