First computer please help me

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Commendable
Oct 20, 2016
9
0
1,510
Hi, i just built my first computer, it has a sapphire radeon rx 470 4g oc graphics card, intel i5 6600 processor (Not the k one), 2x8g G.Skill ram, Case is a Corsair spec alpha with 3x120mm led fans, a tp link on the 2nd graphics card slot, windows 10. I have a Cougar stx650 psu and when i start a new game in skyrim the computer turns off, i believe the psu isnt good enough for my comp. I ordered a Evga supernova 750w p2, will that be good for comp? I will upgrade in the future as well and no need to care about power bill, just want to know if it will be a perfect if not good enough for my comp, i really dont wanna waste money if im getting the wrong stuff, i also have a stereo set up will that use up watts to? Sorry for the noob questions. :( just switched from console to pc.