what power supply should i get

Solution
The system manufacturer will already have made sure that the PSU is powerful enough for the existing specs.

However, pre-built systems typically will not have a top-notch brand of PSU fitted - but it will be quite adequate.

So it's up to you if you want to upgrade it to something better, but certainly not imperative.
The PSU is fine however it will probably not the the best quality one out there and you probably wont be able to go higher then maybe a 1060 down the line. If you want to buy something good I like the EVGA G2/G3 PSUs and I would say get a 550. But for right now I wouldnt bother as you wont be coming close to the 450 watts.
 
The system manufacturer will already have made sure that the PSU is powerful enough for the existing specs.

However, pre-built systems typically will not have a top-notch brand of PSU fitted - but it will be quite adequate.

So it's up to you if you want to upgrade it to something better, but certainly not imperative.
 
Solution