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Single Rail?

post #1 of 8
Thread Starter 
hearing the reason everyone seems to be recommending Corsair HX520 or 620 seems to be it's single railed power supply, which can delivery a lot of amps in 12v.

but reading the tech specification sheets, it seems other powersupply are the same:
Corsair HX520w and 620w 3 12V's and all 18A (where's the single rail? )
Thermaltake Toughpower 700w 4 12v's and all 18A

so apart from Corsair's build quality is better, what is the point that i'm missing?
post #2 of 8
Quote:
Originally Posted by wuyanxu View Post
hearing the reason everyone seems to be recommending Corsair HX520 or 620 seems to be it's single railed power supply, which can delivery a lot of amps in 12v.

but reading the tech specification sheets, it seems other powersupply are the same:
Corsair HX520w and 620w 3 12V's and all 18A (where's the single rail? )
Thermaltake Toughpower 700w 4 12v's and all 18A

so apart from Corsair's build quality is better, what is the point that i'm missing?
I don't recall the Corsair as being single rail PSU's, people rate them highly because of jonnyGURU's reviews. LINK
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post #3 of 8
i think one rail can draw 40a if it needs to on the corsair hx520 or 50a from the hx620. but there are 3 rails. its just that one rail can draw the power that the other 2 rails would get if needed. not sure if this is correct though.
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post #4 of 8
Quote:
Originally Posted by wuyanxu View Post
so apart from Corsair's build quality is better, what is the point that i'm missing?
Corsair doesn't build them. The psu you're looking at is a Seasonic, which is one of the best manufacturers out there. Without getting extremely technical with AC jargon, there are benefits to having a single rail and benefits to having multiple rails as well. Having a single rail is nice because the maximum available current can go to any device hooked up to it, but also is a con since every device on that line will dirty the power. You're fine buying any of the power supplies built by the top manufacturers. The one thing I wouldn't overlook if it matters to you is sound output. There is nothing more annoying to me than a loud psu
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post #5 of 8
Quote:
Originally Posted by sccr64472 View Post
The one thing I wouldn't overlook if it matters to you is sound output. There is nothing more annoying to me than a loud psu
the corsair psu's are actually very quiet. my old 600w cooler master was annoyingly loud.
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post #6 of 8
Thread Starter 
so i can't go wrong by going to either of them?

Corsair HX620 -> first choice.
Thermaltake Toughpower -> cheaper alternative (but still very good PSU??? )
post #7 of 8
I always stuck to the rule of try and go for like 20A on dual rails. Because isnt it more stable
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post #8 of 8
Quote:
Originally Posted by wuyanxu View Post
so i can't go wrong by going to either of them?

Corsair HX620 -> first choice.
Thermaltake Toughpower -> cheaper alternative (but still very good PSU??? )
Correct.
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