Question New to pc

[ErnestoGP]

I have a dell optiplex 790 dt and was wondering if a gtx 750 Ti will fit or to buy a gt 1030?

 

[punkncat]

Look to be sure you have "two" slots space at the PCIe/case. In some Dell cases the DT model has one slot, and some two.

 

[ErnestoGP]

how do I know if I have more than 1 PCIe?

 

[punkncat]

how do I know if I have more than 1 PCIe?

not the PCIe slot itself, but room in the case. IE your video card is going to clip in on the slot. Most modern GPU are "dual slot" meaning that they will actually take up two spaces. Your PCIe slot needs to be lined up with the slot (in the case) both in line with it as well as the one below it.