nvidia titan x

So i got a 1500W psu , 2 titan x in SLI, An icore i7-6950x , 32 gb of Ram (i don't think that matters but also 1 Sd unit 128gb and 2 hard drive units 2TB each so... i Am having some issues in my House with the electricity going off at least once everyweek expecially if my brother leaves his PC...