GPU for 120 watt PSU

[OttoLV]

Right now I have a bad prebuilt and I have to wait till December for a new great PC. So, I want to buy a GPU for the current prebuilt so I can record overwatch videos (doesn't matter if low settings). The prebuilt is a Lenovo S500 SFF with an i5-4460S. I don't know if the motherboard can hold a GPU and there is now cable.
So, I would appreciate your help on which GPU is good, and if I can even have one. (I can't take pic since I am on vacation)

-Thanks, Otto

 

[Gam3r01]

A 120w PSU wont be able to support any GPU, you would be best off waiting it out until you can build a new PC, it wont be worth your money to do anything to that system.