Ah ok, I dont have a physical manual and in the dell manual online (Dell Inspiron 3647) I didnt see it mention anywhere what it was. Either way even if it is a physical 16x but runs at 8x or whatever it should still be fine, with perhaps a few fps loss correct? I plan on creating a sorta janky setup. My brother is visiting for 2 weeks, so was going to throw a 1050ti I have in this pc. As you may be able to tell, there is only room for a single slot card. I'm planning on getting a PCIe riser and just leaving the side panel off.