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Are the capacitators on PSU cables really necessary?

post #1 of 14
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Basically, I'm looking for a fully-modular PSU so that I can sleeve it without voiding the warranty but so far, I've hit a wall. Those PSUs are either too expensive although that's to be expected (AX-Series, X-Series) or they have some capacitators on the cables like Strider Plus, Strider Gold or the ZX-Series (although they have less, smaller ones). From what I understood, they are used to absord some ripple/voltage spikes and are put on the cables to keep the unit shorter. Basically, can they be safely removed or are they needed? I'm asking because I found sources that suggested both could be true...

Thanks smile.gif
Edited by Snowmen - 3/12/12 at 5:37pm
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post #2 of 14
If you check the reviews on Jonny Guru about those PSUs whit capacitor on cables, if your remove it the ripple and general PSU doesn't work very well.
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post #3 of 14
Just an FYI, I believe they are called ferrite chokes or beads.
post #4 of 14
They are not vital, but they will degrade the performance of the PSU (and by extension, the rig it powers.)
Those caps are on the cable to filter interference and to cover the wildly varying power draw all GPUs have. They are also there because space inside the PSU is limited.
In short, if you are careful to keep the polarity right, and are decent with a soldering iron, you can move the cap to the PSU end of the cable, and cover it up with some heatshrink. It will be a little less effective there, but you won't lose anywhere near as much voltage stability or ripple suppression as you would removing it entirely.

JonnyGuru tested, and found they were needed, he's one of the premier PSU experts on the net, listen to him.

Quote:
Originally Posted by Sped View Post

Just an FYI, I believe they are called ferrite chokes or beads.
In some cases they are, in this case they are capacitors, 16V/2200uF Nippon Chemicon KZE series.
Edited by allikat - 3/13/12 at 9:47am
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post #5 of 14
OCN needs an electronics sub-forum.People need to learn the difference between a capacitor and a coil (an inductor).Just what capacitors do (mainly they are coupling devices as they block DC).They need to learn why they block DC and the opposite why inductors oppose the interuption of DC (hence they pass AC).You learn all this stuff in a basic electronics course or book.Finding out the how and why to a transistor is also pretty interesting.
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post #6 of 14
Quote:
Originally Posted by allikat View Post

In some cases they are, in this case they are capacitors, 16V/2200uF Nippon Chemicon KZE series.

Learn something new everyday. rolleyes.gif
post #7 of 14
Quote:
Originally Posted by PCCstudent View Post

OCN needs an electronics sub-forum.People need to learn the difference between a capacitor and a coil (an inductor).Just what capacitors do (mainly they are coupling devices as they block DC).They need to learn why they block DC and the opposite why inductors oppose the interuption of DC (hence they pass AC).You learn all this stuff in a basic electronics course or book.Finding out the how and why to a transistor is also pretty interesting.

This would actually be pretty awesome, I would definitely frequent it and post all the examples from my multitude of electronics books form my courses.
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post #8 of 14
Thread Starter 
Thanks, I'll hand rep to anyone who deserves it. Now, looks like I'm going for a XFX PSU or a X/AX one...
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post #9 of 14
Quote:
Originally Posted by axipher View Post

This would actually be pretty awesome, I would definitely frequent it and post all the examples from my multitude of electronics books form my courses.

I think we could still be a computer oriented forum even though we had a place to talk electronics. Good that allikat posted what the component actually was .I would have bet that Sped was right calling them ferrite chokes. Now I would like to know how technically the caps are working to filter the DC.A clue that caps are used and not ferrite chokes is that ferrite chokes are more often (always for me) sceen on the AC line,caps would make more sense on the DC cabling,but I still would like to know how it works.
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post #10 of 14
Quote:
Originally Posted by PCCstudent View Post

I think we could still be a computer oriented forum even though we had a place to talk electronics. Good that allikat posted what the component actually was .I would have bet that Sped was right calling them ferrite chokes. Now I would like to know how technically the caps are working to filter the DC.A clue that caps are used and not ferrite chokes is that ferrite chokes are more often (always for me) sceen on the AC line,caps would make more sense on the DC cabling,but I still would like to know how it works.

The way the caps are used is to limit excess voltage spikes from occurring and to limit drops as well would be my guess
Edited by Tipless - 3/13/12 at 12:25pm
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