Power Supply question.....

I'm upgrading my systems' power supply and video card (to a GTX 260) and I've noticed the specs for a power supply being either single rail or 4 (or multiple) rail.
I'm not looking to go SLI with additional video cards...I'm just going to run ONE.

Would either spec BENEFIT me over the other if I were to choose a power supply with single or multiple rail?...or does it make any difference?

Thanks.I bought a Corsair TX850w with single rail design for my build mainly because a single rail supplys current with all current available to whatever components demand it. With a multi rail design, it splits the total current up between components = less total current on any given rail. If components on one rail have a hi demand, there is less total current available to those components, regardless of components on other rails having a low demand.

That's all just my OPINION of course. I'm sure someone else can come up with reasons why multi rails are better.


BTW, I run a GTX 260That's what I needed to know.

ThanksI always thought multi-rails had the feature of if one rail fails, then the other components on the other rails that haven't failed still RECEIVE power.

I may be wrong, but that's my understanding of multi-rails from my Antec TP 550.I wouldn't worry about multiple rails vs. single rails, it's MOSTLY marketing material.
Obviously, there is a difference, but in my opinion it's not something to worry about.
Instead, pick a high quality PSU from a reputable manufacturer that has picked up good reviews from trusted sources.Quote from: WSR on August 29, 2009, 02:48:21 AM

I always thought multi-rails had the feature of if one rail fails, then the other components on the other rails that haven't failed still receive power.

I may be wrong, but that's my understanding of multi-rails from my Antec TP 550.