While SLI/CrossFire certification on power supplies and cases tends to be more marketing than anything else, I simply tend to purchase power supplies due to the level of comfort I feel with the manufacturer, and that is determined by PSU quality. Multi-rail power supplies for computers (and modular-cabled PSUs as well) have always left me feeling rather nervous. Any PSU that makes me nervous I would not buy (or recommend, because I won't recommend any product I won't buy myself). I read (earlier today) a comment regarding a recently-reviewed PSU (specifically, the new-design PCP&C Silencer 500 ATX/EPS), in which he castigated the Silencer from being an *overpriced Antec EarthWatts 500*. Having seen both PSUs (in fact, at the same B&M retailer), I'm going to point out two rather stark differences between the two:
1. While both were, in fact, sourced from the same OEM (Seasonic) and use the same caps, the EarthWatts remains (like all of Antec's 500W+ PSUs) a multi-rail design (dual 12V rails in the case of the EA500), while the Silencer 500 remains, like every PCP&C PSU, a single-rail design (one 12V rail supporting up to a 35A draw).
2. Contrary to being overpriced, the Silencer was actually priced less (by $24) than Antec's Basiq 500, which was $10 under the EA (EarthWatts) 500. (None of the three were on sale, and these were retail prices at the same retailer.) This is contrary to typical PCP&C pricing structure; the very fact that they could actually increase availability (especially retail availability) and lower the price without decreasing quality means that OCZ (in the acquisition) and Seasonic (the OEM) have obviously done something right.
For once, it's nice to be able to by a quality PSU without basically feeling that you have to BOHICA in paying for it.