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Single Rail vs. Multi Rail Explainedirst off, Id like to give credit to Jonny Gerow former star of Jonny. GURU. com, now PSU project manager at BFG for writing what I consider the definitive article on power supply rails, one which educated me. If you want an accurate historical and mildly technical explanation of power supply rails, read his article here http www. Also, Im going to not bother mentioning the 5. V and 3. 3. V rails, because it just confuses the matter. In this article I will talk only about the 1. V rail, and singlemultiple versions of it. So lets get down to it. Single rail power supplies are bestNo, multi rail units, stupid. Youve got like five times as many rails to power your parts. No, single rail is best, are you an idiot Look at how much more I can overclockYoure just a moron, you dont know what a rail isYoure just jealous because Ive got a single, massive, powerful rail, if you know what I mean. A Certification Html. Children, children, calm down and shut your traps. Youre both wrong It doesnt matter, at least not in the way 9. What is a rail No, now stop being a smartass. Seriously, most people have very strong opinions on what rail distribution is best, without understanding what a rail is. Download the latest drivers for your Gigabyte 945GCMS2L to keep your Computer uptodate. Gigabyte Ep45-Ds3r Windows 7 Drivers' title='Gigabyte Ep45-Ds3r Windows 7 Drivers' />The common misconception is that a rail is a part in the power supply that provides power. This is utterly and completely false. You can have two power supplies that are 9. No, rather a rail is a group of traces on the PSUs mainboard that are monitored by an OCP circuit. WhatI said, its a group of traces on the Shut up until you can speak English. Fine. A trace is a pathway of copper on a circuit board that carries electricity. You can see them as the faint copper y lines running all over your motherboard. In this instance, Im referring to the traces on the power supply that the wires in the cables are soldered to, specifically the ones carrying 1. V power. With me so farYes. Speaking of tracing, Im going to go get some stencils. Whatever. Now, OCP is Over Current Protection. Motherboard manufacturer and supplier of computer peripheral. Other products include portables, mobile phone, audio and communications. Includes drivers, general. Download the latest drivers for your Gigabyte GA78LMTUSB3 to keep your Computer uptodate. Gigabyte Ep45-Ds3r Windows 7 Drivers' title='Gigabyte Ep45-Ds3r Windows 7 Drivers' />Learn how to enable AHCI in Windows 7 after installation without the need to reinstall Windows or lose any data on your drive. No, it is an audio codec. By default windows installs HD audio drivers for the Reatek chip. It is a small chip with DACs offering minimal features. Descubra onde fazer Download Windows 7 Grtis e Download gratuito do Microsoft Windows 7. First off, Id like to give credit to Jonny Gerow former star of JonnyGURU. PSU project manager at BFG for writing what I consider the definitive article on. Microsoft probeert met de snelle release van Windows 7 te redden wat er te redden valt. Maar eigenlijk is het al te laat. Veel computergebruikers zijn door de. What OCP does is it monitors an output on a power supply. If the amount of current What is Read this http en. Electriccurrent. If the current going through a given output exceeds a certain amount, it will shut the power supply down. What does this have to do with single or multiple railsI was about to ask, yes. Glad to know. The difference between single or multiple rails is this Multiple rail each trace is monitored separately, so if, say, one trace goes over 2. A the power supply will shut down. Single rail all traces are monitored all together, so if the total current going through the 1. V outputs goes over, say, 6. A, the power supply will shut down. Alternatively, no OCP may be present at all on the 1. V rail. Make sense Nothing about single rail having extra power or being more stable, on either side. You could have two identical power supplies with the only difference being how the OCP chip is configured, and one could be single rail and the other multiple. UnderstandNo, I Yes you do, if you dont go back and read through again. So which is betterWell, neither has any affect on voltage stability or ripple suppression or efficiency or anything, really, at least not to a measurable degree. So all those arguments are bogus. A single rail PSU will not let you overclock any higher than a multi rail, or vice versa. However, there is a difference. Lets imagine you have a short circuit on the 1. V and the SCP Short Circuit Protection doesnt catch it. If you have a single rail power supply the draw on that one 1. V wire and that one 1. V trace will climb until either the combined OCP point is reached, or until something burns the cable, your power supply, your motherboard. With large units, usually something will burn before the OCP point is reached. In a multi rail unit, the current would climb until it hit that rails OCP point, at which point the PSU would shut down to protect itself and your computer. Ideally youd have a rail for every wire, but that would be impractical, so you generally see 2 8, depending on the power rating of the PSU and the design philosophy. So multi rail is inherently safer, correct Yes, but early on there were some problems. You see, when multi rail units were first introduced, the specification at the time was poorly written, and power supply engineers made a mistake they put all the cables that power heavy draw components like your CPU, mobo, and graphics cards on one rail, and all the light draw stuff like HDDs and fans on the other. This meant that you had one rail that might be pulling, say, 2. A, and another pulling 5. A. I see They were unbalanced, so the man inside the PSU fell off his unicycle and No. If your PSUs OCP trip point for that main rail was set to 2. A, then your system could easily hit that trip point when under load, causing the PSU to shut down to protect itself. That could cause you to lose data, or leave your friends without backup while playing TF2. Wow that sucks. Yes indeed. The power supply was just as powerful as the single rail units of the time, but would shut down under heavy loads because of the poor cable distribution among the OCP rails. However, that is no longer an issue. The problem units only existed around 2. On a modern multi rail power supply there is virtually no chance of tripping a rails OCP in normal use unless youre running way too much for the power supply to handle anyway. So final verdict Single rail or multi rail Well, with low wattage units it doesnt matter. OCP on a single rail is useful up to about 4. A or thereabouts, which is where most 5. W power supplies fall. So with 5. 50. W and under power supplies, its a moot point. However, with high wattage units, 4. A on the 1. 2V 6. W and higher picking a multi rail unit will provide you with an extra layer of protection. It isnt essential, and it has no impact on the power supplys performance. However, it does provide an extra layer of safety in case you get a short circuit. And I would consider it a must for 1. W power supplies H recently tested the single rail Corsair AX1. PSUs OCP is set for over 1. A, the short overloaded and destroyed most of their testing equipment. So there is a danger with single rail units over 1. W. So multi rail is mildly better, especially with high wattage units, but it wont have any impact on your performance or overclockability. Adobe Lens Profile Downloader Lightroom 6 Serial Number on this page. There, does that settle it. HAHA TOLD YOU MULTI RAIL WAS BETTER. You can kiss my rail for all I careighhis has been your friendly neighborhood Phaedrus, signing out. Further Reading. Edited by Phaedrus.