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post #13191 of 14275
Quote:
Originally Posted by mrtbahgs View Post

I understand that resistance is increased with longer cables, but I find it hard to believe the resistance increases that significantly over just an extra 8-24" with an extension added.
I suppose the connection and contact in the wires may also add to this, but that variable could kind of be removed if someone made a custom set of replacement cables and compared stock length to the custom cables that are 2' longer to be a touch extreme, but still realistic.

Does a test or study like this exist or anything else out there easily show that just a foot or 2 makes that much of a voltage drop?
I could wrap my head around it if we added like 10 or 20 feet and more, but I wouldn't think 2' more could be a game changer.

Voltage drop calculator...http://www.calculator.net/voltage-drop-calculator.html?material=copper&wiresize=20.95&voltage=12&phase=dc&noofconductor=1&distance=3&distanceunit=feet&amperes=1&x=0&y=0
post #13192 of 14275
Quote:
Originally Posted by Iwamotto Tetsuz View Post

Extrention, or sleaved cables. The resistance of the wire increaced thus less 5V going into motherboard

Low voltage arking caused by bad connection of wires or bad solder joint due to bad sleaving

AFAIK the added resistance would limit current not drop the voltage. And just for a cable of that length it would be negligible...
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post #13193 of 14275
Incorrect gauge wire perhaps?
   
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post #13194 of 14275
post #13195 of 14275
Quote:
Originally Posted by geort45 View Post

AFAIK the added resistance would limit current not drop the voltage. And just for a cable of that length it would be negligible...
Voltage=Reistance X Current

Voltage and current would be effected when resitance changes, Typically the more reistance the lower the voltage and current you will get.

I would say low voltage arking caused by bad contact could have happned.
if the psu works fine before sleaving and after sleaving plorbems occured
post #13196 of 14275
Quote:
Originally Posted by Iwamotto Tetsuz View Post

Voltage=Reistance X Current

Voltage and current would be effected when resitance changes, Typically the more reistance the lower the voltage and current you will get.

I would say low voltage arking caused by bad contact could have happned.
if the psu works fine before sleaving and after sleaving plorbems occured

Then test resistance on each wire with a multimeter I guess?
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post #13197 of 14275
Quote:
Originally Posted by geort45 View Post

Then test resistance on each wire with a multimeter I guess?
You could test reistance on each wire, after and before extension.

Bear in mind that, theres not really a way you can test low voltage arking due to bad contact after sleaving.
only way is to use common sense and see if anything is lose or pins not making perfect contact
If there was a bad solder joint. Also joining cables wihout soldering both wires toghter could cause the plorbem

I don't see how 4.5V input for 5V will make the computer crash though

And i'm not fully sure on whats your actually plrobem, if we get this more clear it may help solve the plorbem.
If the previous suggestions didn't work

Generally saying, most wires would be measured to be 0 Ohms on the multi meter, if its 0.5Ohms or higher it may be causing the plorbem, too much resistance
Quote:
Originally Posted by mrtbahgs View Post

I understand that resistance is increased with longer cables, but I find it hard to believe the resistance increases that significantly over just an extra 8-24" with an extension added.
I suppose the connection and contact in the wires may also add to this, but that variable could kind of be removed if someone made a custom set of replacement cables and compared stock length to the custom cables that are 2' longer to be a touch extreme, but still realistic.
Depends on cable width and length,
If the width is great(allot of metal)and it is using highly conutive material like copper. The increaced legth would be negible and too small increace in reistance to do anything siginificant.

Also reguarding to the plugs for extension, If its designed to pass through large ammounts of currents the reistance would be low, and again the increace in reistance would be too small
Quote:
Does a test or study like this exist or anything else out there easily show that just a foot or 2 makes that much of a voltage drop?
I could wrap my head around it if we added like 10 or 20 feet and more, but I wouldn't think 2' more could be a game changer.
Depends on the wire really, We can have thick wires that has low reistance
If our wire is long enough, we can use it as a reistor, instead of using wires we can wire a resistor in series
that has a reistance from 0.1-5Ohms and we can carry out a practicall expriement measuring voltage and current. It would be the same thing as getting that much resistance with longer wires
Edited by Iwamotto Tetsuz - 2/10/16 at 7:36pm
post #13198 of 14275
Quote:
Originally Posted by geort45 View Post

Quote:
Originally Posted by Iwamotto Tetsuz View Post

Extrention, or sleaved cables. The resistance of the wire increaced thus less 5V going into motherboard

Low voltage arking caused by bad connection of wires or bad solder joint due to bad sleaving

AFAIK the added resistance would limit current not drop the voltage. And just for a cable of that length it would be negligible...

Actually, the device will still try to draw the same amount of current so the voltage will drop.
     
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post #13199 of 14275
Hey guys and Gals! Quick question, I apologize in advance as I'm sure it's been asked before and I couldn't really find an answer, so here goes!

I have an SFX PSU in my build that is in my Sig, For my Fury X it comes from the PSU as one 8 pin then the cables loop into two 8 pins pcie at my graphics card, I'm planning on Sleeving these in MDPC Color-X. My question being, how do I sleeve the loop in a manner that is aesthetically pleasing, As the cables and sleeve will be very visible. Would love to hear suggestions and thoughts smile.gif
Edited by tysonischarles - 2/11/16 at 3:07am
    
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post #13200 of 14275
Quote:
Originally Posted by Lady Fitzgerald View Post

Actually, the device will still try to draw the same amount of current so the voltage will drop.

Absolutely.

Also true that extensions are too short anyway to introduce much voltage drop.

Moreover, modern switching PSUs actively measure voltage drop and adjust for it.

So, no reason to worry about length of cables at all, unless you plan to have your PSU in a different room than the rest of the PC smile.gif
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