Question 1000W or 750W PSU?

Apr 13, 2019
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I know this question gets asked a lot but here is the deal: I found a deal where the 1000W PSU is same price as 750W? (Corsair HX750 or HX1000) which one should I buy even the fact that I know I dont need a 1000w for my pc setup, as I only run 1 graphic card gtx 1070 and still on a ddr3 motherboard - nothing special.

So the real question remains are there any cons to not utillizing a 1000w psu to the max? In my mind using a 1000w would run more efficiently than a 750w as I'm not using more than 50% of it whereas on a 750w it would have to perform more (more cooling maybe), I'm not sure - maybe its the same