Can someone please help identify what kind of PCI slot I have?

[Eye H8 Empty V]

So I have this massive VideoWall processor in my showroom and would like to add a GPU to it to boost some of it's capabilities. I asked the manufacturer what kind of PCI lane it's got and they told me PCIe. So I ordered a GeForce GTX 750ti and it's got way too many pins for this slot. Can someone please help identify what kind of slot it is? I need to order a GPU that meets the minimum specs below. Thanks!

Minimum Specs
NVIDIA GeForce 220 or later required for hardware acceleration (strongly recommended – more powerful NVIDIA card recommended. PCIe connections only).

 

[BadActor]

Those look like PCIx4 slots. Can't really tell from the picture, but if the end is open, you can still install the the GTX 750 Ti in it. If or how well it will work, I can't tell you.

http://www.tomshardware.com/faq/id-2183099/types-pci-slots.html

 

[Eye H8 Empty V]

The slots are only 1.5" long. Does that help?

 

[BadActor]

I'm fairly certain those are x4 slots. You can compare them to the pictures in the link above. I don't have a motherboard handy that has them or I would measure to double check. There is a certain amount of interchangeability in PCIe slots. Smaller cards will work in larger slots, and larger cards can work in smaller slots if the slot is open on the end. As to whether your graphics card will work in the x4 slot, providing it has the open end, I can't tell you. An x4 slot may not provide enough power for that particular card to run.

 

[Eye H8 Empty V]

So is it definitely not an X1? It does not have an open end on the slot so this card will not work. But I do need to find something that does.

Thanks!

 

[CountMike]

No, not x1 for sure, x4 at best. I know some people that have cut plastic out of x8 to fit x16 cards but performance with x4 even if it worked would be severely lowered.