Any power supply can be DOA, it doesn't discriminate brand or model.
Whether a PSU that is working as intended is actually reliable is a whole other thing.
I can't find any reviews of the CoreXStream units. Looks to be a new budget range from OCZ with no efficiency ratings and manufactured by HEC. I would stay away, HEC doesn't have the reputation of a reliable manufacturer. Of course, this doesn't mean that any HEC unit will instantly explode... No, it means that the unit may be more prone to errors when heavily stressed and/or when used for several years.
The only units I'd buy from OCZ are the ZS (made by Sirtec) ZT and ZX series (made by Great Wall), they have garnered positive reviews.
Try to get your money back from the retailer for your DOA unit and buy something that is known to be good quality. Where did you buy from, locally or online?