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12v Rails Explained


Facebook Google+ Twitter YouTube Subscribe to TechSpot RSS Get our weekly newsletter Search TechSpot Trending Hardware The Web Culture Mobile Gaming Apple Microsoft Google Reviews Graphics Laptops Smartphones CPUs Storage Cases Dual rails are not nexessary at all!! YES- I would agree that to call people using a dual 12v rail PSU suckers is very uncalled for! Hurray!

solved Will multiple 12V rails on a psu affect power support? That causes either a nice orderly shutdown from the over-current protection or smoke and sparks. If it is required, how can I provide power for this system? If you think you might add another disk or two at some time, allow a few more amps for each one to the current requirement at 12V of the current hardware.

12v Rails Explained

I just don't know if I'll need the -5V rail. Is there a root language from which multiple Forgotten Realms languages were derived? There are dozens of high quality dual rail psu's, and to label their owners as suckers only shows your own ignorance. Reply to hunter315 NojjHDec 20, 2013, 8:34 AM When I was looking at the PSU just then, it looks kike there are 2 6 pin connectors, http://gyazo.com/9505887d6a9d29385ec0ac03d45c1ac7 here's a picture to

The most sensative to electrical noise are video cards, especially those that draw high power. As an example, a rail rated at [email protected] can spin up 7 or 8 disks. All Rights Reserved Tom's Hardware Guide ™ Ad choices Welcome to the Ars OpenForum. Power Supply 12v Rail Amperage And when they say 12 volts at 40 amps at 50C, they're not kidding.

It seems kinda odd to do that. Both sides could be right....... becuase there is no such thing as true dual rails. http://www.playtool.com/pages/psumultirail/multirails.html getting back to the subject of dual 12v rails.

The safety issue is non existant!! 12v1 And 12v2 Rails Unless you have a really shitty battery, you just dealt with ~6000va... 12vdc is insufficient voltage to generate flow thru the human body. This is definitely done to meet UL safety regulations. Log in with Facebook Log in with Twitter Log in with Google Your name or email address: Do you already have an account?

Dual Rail Power Supply Schematic

androgen Ars Scholae Palatinae Registered: Apr 13, 2004Posts: 1480 Posted: Sat Sep 03, 2005 6:54 pm quote:SSI standard EPS12V requires split +12 volt rails. http://arstechnica.com/civis/viewtopic.php?t=362405 getting back to the subject of dual 12v rails. 12v Rails Explained It varies. 12v Rail Power Supply First theres saliva glands and other saline filled ducts in your tonge that let the curren through the tissue and over your nerves without passing over the skin itself.

These things have switchmode transformers using transistors switching many khz through a ferrite core, they can have very low impedance relative to big tough iron jobs. Again...Im not going to call anybody names who uses a dual rail or for that matter uses a generic PSU... Single 12 volt rail PSU A single 12 volt rail PSU just has one output circuit which generates 12 volts. Once the PWM shuts down, you are looking at microseconds for output caps on shorted rail(s) to discharge.Since all PSU/VRM designs need sufficient voltage feedback bandwidth to meet increasingly fast load Single Rail Power Supply Vs Dual Rail

This kind of PSU will work just fine with a modern computer as long as it can deliver the wattage. So YES-- Intel was pushing the dual rail issue - which they have all of a sudden backed off. According to the ATX standard, 12V2 is the 12 volt rail which powers the CPU and is provided by the 4 pin 12 volt cable. 12V1 is the 12 volt rail A.

qball Ars Tribunus Militum Registered: May 5, 1999Posts: 2238 Posted: Sun Sep 04, 2005 10:56 pm quote:androgen replied: 'that residential circuit can only handle 1800VA @ 120V not at 12V." WHich Power Supply Rail I took his "nothing uses the 12V rail as-is" to mean "nothing uses the 12V rail" Jhhnn Ars Legatus Legionis Registered: Jul 30, 2000Posts: 13663 Posted: Thu Sep 01, 2005 9:36 And why get a SLi PSU when you are using non-capable video cards :) Stick to something like a Enermax 400W or TASK or even Silverstone.

There is no multirail overcurrent protection in there.

It should be easy to know which kind of 12 volt rails you have but that's not going to happen until PSU makers start putting out real specifications. Reply to 4DC_Resin_Smoker win189Jul 24, 2012, 8:16 AM Ok so in the end are we saying its better to go with a single Rail or multiple or that it dose not The only one I had know of off hand prior to that was the corsair HX-1000 which is actually 2 500W PSUs next to each other in a single box as Power Supply Rail Definition KalTorak Ars Tribunus Militum Registered: May 27, 1999Posts: 2623 Posted: Thu Sep 01, 2005 5:37 pm Noise on a 12V rail isn't a terribly big deal.

Should I even be worried about rail distribution? One reason to have multiple separate 12 volt rails is to improve the load regulation and noise on the rail. The background of split rails is to limit the output of each +12V rails to 240VA so it is non-hazard to human. Or would that need to be done by myself?

It is only what occurs in various failure conditions that UL is concerned with and that is the reason for the limitation.-Q Miles Ars Praefectus Tribus: WI, USA Registered: Jul 30, On the units where the sum of the listed max currents for the 12V rails does add up to the stated limit of the 12V source the true current limits are A tale of two sources: Is TLS *defense* against Man-in-the-Middle, or not? DO NOT forget to connect the 4-pin ATX +12V power plug.

After that, it'll be loaded only half way, with no way to shift the unused power to another rail. That would be my greatest concern about high-current rails.