My PC is that Desktop sized (it seems kinda thin and I'm worried that GTX 1050 Ti can't fit inside), Max. Power Output is 250W. What is the best GPU that I can get? Can I buy only these low profile ones?
Unfortunately due to the PSU, you're options for discrete GPU's are practically impossible. Just for the sake of relevance and double checking, what form factor do you have? MT/DT/SFF/uSSF?