I think I read this somewhere-- the computer is limited to a 2GB graphics card? I was hoping somebody could clarify what is the most powerful (if there is a limitation) graphics card I can install in the pre-built system considering I have a i7 7700 processor, 16GB RAM, and a GTX 750 Ti.
The video card limitations of the Inspiron 3668 are based on the 240w PSU (power supply unit). Below are the tested/validated Dell OEM video cards =
1MPR3 AMD R9-360, PCIe, 2GB, DVI-I/Display Port/HDMI
24K8H Nvidia GTX 1050, PCIe, 2GB, DVI-D DL/Display Port 1.3 (1.4 Ready)/HDMI 2.0, 75w
8MXMJ Nvidia GeForce GTX 750 TI, PCIe, 2GB, DVI-I/DVI-D/MiniHDMI
J27RG Nvidia GT730, PCIe, 2GB, VGA/DVI-D/HDMI, 30w
8CCF1 Nvidia GT1030, 2GB, DVI-D SL/HDMI, 30w
To use other 3rd party video cards, you would have to ask other users if they have tested 3rd party PSU of higher wattage in this model.