Here's the conclusion of a review of the Fortron unit over at SilentPCReview..
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The Fortron Source Power Blue Storm AX500-A is a great improvement over the last Fortron PSU that we reviewed. Efficiency is definitely this power supply's greatest strength. Noise levels between the Blue Storm and the FSP350-60PN Aurora measured within two dBA, but the Blue Storm is quieter subjectively.
In a wider comparison with power supplies from other acoustics-focused manufacturers, the Blue Storm fares less well. There are units with quieter fans and fan controllers that output less voltage to a higher power output level, although few of them will beat the Blue Storm in efficiency. Kudos to Fortron for using a sleeve-bearing fan instead of a ball-bearing model, which would have been noiser. Still, this sleeve bearing fan was not really quiet enough to push the Blue Storm into the top ranks of quiet PSUs.
The retail pricing seems quite attractive for its power rating, but this is such a variable that it is difficult to comment on with confidence. The inclusion of Molex connectors with grips is also a point in the Blue Storm's favour. We look forward to seeing this feature on more power supplies from Fortron, and hope that such connectors become industry standard.
Overall, the Blue Storm is a well-rounded power supply that suits many applications. Its flat efficiency curve makes it suitable for use in both high and low power applications. Although the noise it produces at higher output levels would be unacceptable to a hardcore silencing enthusiast, it is likely that in a high powered system there would be other, greater sources of noise.
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Nothing there tells me that this is a spectacular buy. I'd still go with the Antec unit myself, but this does look to be a pretty good unit.
Jon