Originally Posted by Chozart
Well... those brands are not necessarily 'much' better... reviews vary.
They are all good PSUs, but the GameXStream just delivers a lot of power for a relatively low price.
The most serious competitor at this moment for the 700W is actually the PC Power & Cooling Silencer, which I do recommend over the 700W GameXStream. However, finding a PSU that delivers 600W and 44A on 12V rails for like ~$120 is hard, other than the GameXStream
Do note that the review was still good, save the ripple issue.
Zippy is good, but expensive if you want to get the same power; the Silverstones are indeed underestimated (I think the single rail 560W version is one of the best PSUs out there; the multiple rail version have some problems though, like an odd distribution among the rails, although Silverstone might have fixed that). Seasonic is good also, but 36A on the 12V rails for a 600W unit is a little low...
I'm not siding with Silverstone, Seasonic, or Zippy over OCZ or FSP because of the brand, no, I'm siding them because of the history they have have having the best of the best out on the desktop market. A 700w PSU is 700w PSU, what distinguishes them is their future reliability, the caps they use and their voltage regulation.
The review is on the GameXstream is pretty good but the ripple problem could be an issue sometime down the road.
The Gamexstream is an inferior product, in every way, compared to the Etasis based Silverstone above and they're only 35$ apart.
I'll admit the Zippys are a little expensive but it's generally agreed that it's worth the premium considering the reliability you are getting, the silverstones, from what I have seen, have never had problems with their rails and the newer 600w Seasonics (M12) put out 576w on the 4 12v rails alone (it's actually 1 or 2 rails) with the 700w outputting 672w on the 12v.