This PC had video built in to the motherboard. The motherboard has one PCI Express slot for expansion. After carefully measuring available height and width, and upgrading the power supply, an ATI R7 360 GPU was purchased.
ATI R7 360 box
ATI R7 360 card
ATI R7 360 power connector
ATI R7 360 installed
The installation of the GPU was tight, and took patience. Two metal slots were removed from the PC case. Note the additional power connector is on the right side of this picture.