Ahhh okay. I was looking and seeing the pin difference and figured that they were tied to different motherboards. So the connector on the motherboard is same on all variations whether a Xeon or iX is present just the connector end to the display. That makes sense.
I knew there was 4k option but I was confused about the pin difference.
I was looking for a 7740 in the right configuration but just couldn't find one that met what I wanted to pay. Stumbled onto this high spec 7750 with the 6 core Xeon and RTX 4k that was cheaper then the 7740s I was looking at so hoping its good to go like my 7520 is. My old Acer laptop is just getting to old and needs replacement. Bit bummed there is no provision for sata drive but guess that's is just what it is now.
44TRN is the part number for the 4k UHD screen. VC9P0 is the panel I have and is the FHD screen and if the spec page on the Dell support is correct I have the IR webcam.