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Dual 12 Volt Rail Is Unnecessary


Aug 14, 2011 Can you confirm +12V2 rail is bad? You misunderstand what DarkSyd is saying. solved I have a 650w, single 12v rail PSU, is it good enough to run the ASUS GTX 770 and i5 4670k? Thats something that's been going on for quite while. 6 years or so ago ,when Corsair introduced thier HX line-up to the world ( HX520/620 ), it was discovered that there

Accs Ars Legatus Legionis Tribus: San Diego, CA, USA Registered: Apr 16, 2003Posts: 12538 Posted: Thu Sep 01, 2005 10:51 am The multi-rail power supplies usually have isolated rails. More information us in Super User question Core i3-2100 with 65W power supply?. asked 2 years ago viewed 9009 times active 2 years ago Blog Women in the 2016 Stack Overflow Survey Linked 9 Why is there a -12V rail for ATX 0 Why It's clearly a fact according to Intel's testing that many PSUs can deliver far more current on a single 12 volt rail than their specifications claim and even more than the

12v Rails Explained

pctek04-12-2006, 09:10 AMMore importnat is the +12vs. We recommend that you use a PSU with higher power output when configuring a system with more power-consuming devices. And given the price conscious nature of the PC market, you'll probably never run into one. And BTW the path across MY arms is about 6 1/2 feet.

thegrommit Ars Tribunus Angusticlavius et Subscriptor Tribus: Canuckistan Registered: Sep 22, 2000Posts: 8233 Posted: Thu Sep 01, 2005 8:19 pm quote:Originally posted by KalTorak:Noise on a 12V rail isn't a terribly Can anyone please help? Similar Threads - Dual volt rails Forum Date Mini PC with dual 4K displays General Hardware Nov 8, 2016 (SOLVED) Dual CPUs, Xeon vs i7 'Haswell' and ASUS Z10PE WS General Power Supply 12v Rail Amperage The names of the three kinds of power supplies are a bit long so let's shorten them to single 12, independent 12s, and current limited 12s.

The real issue is whether the power supply provides enough total current at 12 volts (as well as the other rails) and not whether it has multiple 12 volt rails. Dual Rail Power Supply Schematic Can he run a OC'd 3000+, 1 HD, 1 SB Audigy, 1 7800GT, 3 fans, 1 DVD, 1 DVD-/+ R? How is this sorting algorithm Θ(n³) and not Θ(n²)? Newer Than: Search this thread only Search this forum only Display results as threads More...

The bad news is that the marketing specifications for supposedly multi 12 volt rail power supplies don't tell you whether the current limiters are real or not. 12v1 And 12v2 Rails Reply to hunter315 31 answers Last reply Aug 20, 2016 More about single rail multiple rails eternal question answered ProximonJun 7, 2011, 5:32 AM Good stuff!Last year some may remember that Will it work without an adapter?7External “power brick” style PSUs - are they reliable enough?1New build not powering up4Connecting 20 pin power supply to a 24 pin board1What PSU is usually The system may become unstable or may not boot up if the power is inadequate.

Dual Rail Power Supply Schematic

I go back to my statement in an earlier post-- Why if dual rails are so necessary did such companies as PC Power and Cooling as well as other totally avoid http://arstechnica.com/civis/viewtopic.php?t=362405 Dual 12v rails are supposed to be safer, and IIRC it was Intel that was initially pushing for the dual rail standardization. 12v Rails Explained If you try to draw more than 30 amps of total current from both of the rails then it will also shut down (assuming that the internal 12 volt rail also 12v Rail Power Supply Pretty much nothing* uses the 12V rail as-is, so the only things attached to it are voltage regulators.

If we were back to the 80' where op-amps were always powered symmetrically at +12V -12V: Okay.. the only obligatory protection is the OVP and OCP, any other protection is optional. It's a reasonable answer for superuser –barlop Feb 13 '14 at 19:49 | show 2 more comments up vote 1 down vote Here is the power supply that you have. Is the 4-pin connector optional or is it required? Single Rail Power Supply Vs Dual Rail

I've never seen any of the plugs labeled. Reply to Abdelrahman_3 alphanumerical usernameAug 20, 2016, 11:01 PM hunter315 said: Many people are confused by whether a single 12V rail or a multiple 12V rail power supply is better. Theres no way you can percieve that little current, particularly when its decentralized over most of your body. You know what this means, right?...

Now granted after 10+ years I don't really feel it much anymore, but I also don't touch both terminals very often either. Power Supply Rail So if your PSU needs to deliver more than 20 amps at 12 volts and obey the safety standard then it needs to have more than one 12 volt rail. The multimeter has 2 probes, call them red and black.

This is because EACH RAIL is individually current limited, and you can't shift power from one rail to another.

Disarium Dilemma more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / With a modern power supply you are unlikely to overload any rail without using a large number of adapters and splitters to get more connectors, the manufacturer already spread the connectors half a second? Power Supply Rail Definition So YES-- Intel was pushing the dual rail issue - which they have all of a sudden backed off.

There are alot of issues concerning dual rails.... So im using a pico power supply where the cord has a brick. So the dual rail PSUs are typically more expensive than single, yes. androgen showed why.

share|improve this answer edited Feb 13 '14 at 20:43 answered Feb 13 '14 at 20:22 barlop 13k1664115 add a comment| Your Answer draft saved draft discarded Sign up or log IIRC, it's the power pulses drawn by the CPU when it switches from the idle loop (I think it's halted under WinXP) to active, and back. If you check the manufacturer's specs on some of those PSUs you'll find that their claimed maximum currents on their 12 volt rails are well below 20 amps despite the fact In order to supply more than 20A at 12V, two rails are necessary if the supply manufacturer wants their product to be UL-certified.

Yeah because the resistance of a steel screw driver is 4 orders of magnitude less then your skin, and a copper wire 5 orders. All this adds up to the suspicion that many power supplies which claim to have multiple 12 volt rails are actually single 12 PSUs despite how they're marketed. Would descendants of Earth people stranded on another planet eventually forget about Earth? They're bound to vary a bit.

It seems kinda odd to do that. Terms of Use Privacy Policy Licensing Advertise International Editions: US / UK India Home Forums Search Forums Recent Posts Your name or email address: Password: Forgot your password? Pretty much every modern motherboard has a separate 12V power connector that's either a 4-pin or an 8-pin. The answer to the question of which is best a single rail unit or a multi rail unit is that it does not make a difference, so lets explore why.In older

It is a legacy from when it was seldom used on ISA cards, and for backwards compatibility. Initially the specs allowed 20 amps on the 12 volt rails as a safety measure and thus requiring multiple 12 volt rails. can u point me to a suitable example? –Geeks On Hugs Jun 3 '12 at 23:22 I dunno. A 240VA AC transformer will supply ~ 170 watts rectified DC minus diode voltage drop.

If you have a single 12 rail PSU then you have to make sure that it can handle the 12 volt total of 33 amps. They're separate rails, after all, and they have their own circuitry which controls the voltage. How do I overcome my fear of speaking with an accent when communicating with a native English speaker? ciltRailway Signal AssociationMetin Parçacığı görünümü - 1911Journal, 15.

Reply to ko888 keepcalmandmakegreenteaJan 9, 2014, 3:25 AM Before I ask my question, yes, I've read the stickies about power supplies, especially this one, but unfortunately, I still don't entirely understand. I'm sorry... connectors anymore, some onboard hardware might still be using these protocols (e.g. Reply to InvalidError nix327Dec 29, 2012, 8:37 PM Thanks for all the info!