I was about to upgrade the video card in my office computer when I thought that it may be a good idea to open it up and make sure I had the available PCI slots. When I do, I notice that I have one PCI that I'm used to seeing and I also have a second, longer PCI slot. I initially thought it was one of the newer, faster PCIs but upon Googling my brain out I have yet to find a single photo or drawing that resembles what I have.

The computer is a Dell Optiplex 170L and I got it towards the end of 2005. The Dell website isn't very helpful either, as it just says "3 PCI slots."

I ran System Info for Windows but it didn't help much either.

Or is it even PCI?

This is my mobo and it's the bottom one that's confusing me:



Thanks!