Optiplex 390 upgrade question

Hi.

I joined an auction last year just for fun and bagged a 390 for $20+

Reading through discussions here i decided to upgrade and now my current set up is: 

i3, 16gb Ram. Amd radeon 7470, and a wd blue 1tb 2.5 ssd is arriving next week. Hope it will work. Haha

Next on my list:

Gtx 1050 Ti Low profile

I7 2600k

Now reading through a few discussions here and some other forums and reddit got me confused..

Question:

Will the incoming cpu and gpu upgrade run on my stock psu coz i plan on sticking with the sff setup (small space on my room lol) and finding a psu that would fit my sff would be a pain these days based on what i usually read..

If not, what would be the best alternative for the gpu/cpu? 

Thanks!