I've been searching for days a new gpu for my dell inspiron 3647 sff case, with only 220w psu, i know that the gpu must be a low profile, i found a gtx 750 ti low profile from zotac, but problem is it needs 300w psu, after that i had started searching for any psu that fits in my case with the minimum of 300w, like i said i'm searching for days so please help me find this.
I'd try it with the PSU you have. It should work. Looks like only other option is a new case and PSU.
I'll get the GTX 750 Ti after this, i've searching a little more, some people said the only option to this pc, inspiron 3647 small desktop, is an r7 250e that power consumption is around 60w according to them, if Nvidia says 750 Ti is 60w, should work too, anyway, watts tested for the 750 Ti is 30, i will choose for the 750 Ti which has a better performance than r7 250. You helped me a lot, Thank you very much!