best graphics card for 220w psu

Afzal Sulaiman

Honorable
Sep 11, 2013
146
0
10,680
dell inspiron 660s
intel(r) core(tm) i5 3330s @ 2.70ghz
ddr3 4gb ram
chipset intel ivy bridge, southbridge intel p75/b75
220w psu
win10
hello people,
as you all know, the inspiron 660s is a slimline pc that comes with small form factor gt620m. few weeks ago my gpu died. im looking to replace it with slightly a better gpu and add another 4gb ram. dell customer support says the hd 7570 and gt 620 is the only recomended gpus and they say psu upgrade is kind of impossible. but i been to lots of places where people say they use hd7750 with no problem on the 220 psu. i know it's a gamble, but would it be okay to use it on my pc?
if i use hd7750, what are all the things i be putting on the line? is there anything i can do to reduce the risk? do tell me the best gpu for a 220w psu.