Need help deciding what to replace my caps on my motherboard with.

[PCBONEZ]

Re: Need help deciding what to replace my caps on my motherboard with.

We have 'General purpose', 'Audio' capacitors and more. Who dictates that ?

No one.

A "Standard" means several companies got together and agreed they would all do 'something' the same way.
That hasn't happened in the Cap industry, at least when it comes to ESR.

GP for our purposes means not low ESR and that is determined by ESR [or Z] not being shown in the data sheet.

'Audio Cap' is an advertising thing that implies something special was done enhance the cap for use in audio equipment.
But, there is no Standard written down somewhere that they have to comply with to call their cap an audio cap.

The ESR terms are the same way.
That's why one has to look in the data sheets.

With audio caps the situation is worse because [if they did them] the things done to make caps audio caps aren't in data sheets.
.

[Pyr0Beast]

Re: Need help deciding what to replace my caps on my motherboard with.

We have 'General purpose', 'Audio' capacitors and more. Who dictates that ?

[PCBONEZ]

Re: Need help deciding what to replace my caps on my motherboard with.

That brings up another point.

Terms like 'low ESR', 'ultra low ESR, 'very low ESR' have no -real- meaning.
- There is no Industry Standard that defines any of those terms.
As such the various manufacturers can tag their product with one of those terms regardless of how good or bad the caps are.
Is 'ultra low' lower than 'very low'? - Depends on who made it.
And brand X's Super Whamodyne Low might be equivelent to brand Y's Kinda Low.
.

[Pyr0Beast]

Re: Need help deciding what to replace my caps on my motherboard with.

Recap with 2200uF LowESR Pannys and you are good to go

[arwinbones]

Re: Need help deciding what to replace my caps on my motherboard with.

Im a electronic geek so I understand every bit of it. I see what you are referring too.

[PCBONEZ]

Re: Need help deciding what to replace my caps on my motherboard with.

0.087 caps around a VRM? Either it's a really old P3 board, or they skimped.

Depends on how many are in the VRM.
- I have a 'late' Slot A board with 18 2200uF VRM caps.
That wasn't too unusual for AMD for a while.
Back then AMD was having CPU issues with cheap PSUs and I think their fix was to uF the VRM to death.
With so many caps the individual caps didn't need to be especially low ESR.
.
Board in question is a socket A @ PC2100 so it's not that much never than the one I mentioned.
.

[mockingbird]

Re: Need help deciding what to replace my caps on my motherboard with.

0.087 caps around a VRM? Either it's a really old P3 board, or they skimped. I think it should be safe to use something like HM around the VRM and FC/PW everywhere else. I just recapped an AN78X with Samxon GC for VRM and Nichicon PW everywhere else.

[PCBONEZ]

Re: Need help deciding what to replace my caps on my motherboard with.

Look at the data sheet.

See where it says "Ripple"?
That's the amount of Ripple Current the cap can handle without overheating.
The units are mA [milliamps]
** Your replacements should have the value of the original cap or more.

See where it says "Z"?
Z stands for Impedance. Impedance is like resistance but it is for AC only.
- Layman Definition: ESR is the 'resistance' to ripple [which is AC] passing through the cap.
In this data sheet Z is specified at 20°C and 100kHz. [That is standard for low ESR caps and most others.]
In a cap Impedance is made up of Capacitive Reactance, Inductive Reactance, and ESR.
At 100kHz the Capacitive Reactance & Inductive Reactance cancel each other out so at 100kHz, Z = ESR.
- Since one of the caps main jobs is to short the Ripple to ground to keep the DC power nice and 'clean' we want the 'resistance' to be low.
ESR units are in ohms.
** Your replacements should have the value of the original cap or less.

The voltage rating is a -max limit- not an operating parameter so going to a higher voltage is just fine.
Going down in volts is only okay if you check the actual circuit voltage and don't use a cap rated for less volts.
----- Motherboard Exception...
The only voltages on motherboards are 3.3v, 5v, 12v, or less than 3.3v.
.. Neither a 6.3v or a 10v would be found in a 12v circuit.
.. That means all 6.3v and 10v mobo caps are on actual voltages of 5v or less.
.. That means you can safely use 6.3v and 10v rated caps interchangeably.

Have I managed to confuse you yet?
.

[PCBONEZ]

Re: Need help deciding what to replace my caps on my motherboard with.

They have an LZ on them, or they should....
It's the "LZ" you posted in post #4.
Do they all have that?

I'm uploading the LZ data sheet so you can learn what to look for.
.

[arwinbones]

Re: Need help deciding what to replace my caps on my motherboard with.

What is LZ in particular? I know that they are green with the negative has a gold band.

[PCBONEZ]

Re: Need help deciding what to replace my caps on my motherboard with.

Asking what would be the best to replace them with.

That depends on what series they are.
G-Luxon makes a lot more than one series.
Are they all LZ?

[brethin]

Re: Need help deciding what to replace my caps on my motherboard with.

Almost anything would be better than G-Luxon and Teapo. My guess is since you did not post what board you have (Make and Model#) it is crap and you need to replace all the caps on it. Read the other replies they are telling you what to get to replace the ones you are asking about but you can not just replace a few if they all suck.

[arwinbones]

Re: Need help deciding what to replace my caps on my motherboard with.

Asking what would be the best to replace them with.

[brethin]

Re: Need help deciding what to replace my caps on my motherboard with.

Are you still asking what caps to use for replacements or just stating what is on the board.

[arwinbones]

Re: Need help deciding what to replace my caps on my motherboard with.

There are 22X G-Luxon Caps that are 8mm to 10mm in diameter. 10mm is the largest I have on this motherboard. 11X 1000uF 6.3v, 7X 2700uF 6.3v, and 4X 1500uF 10v on my motherboard.

[arwinbones]

Re: Need help deciding what to replace my caps on my motherboard with.

I have one of the seven caps I took off and I was mistaken about the 1500uF. It is really a 1000uF 6.3v G-Luxon cap.

[c_hegge]

Re: Need help deciding what to replace my caps on my motherboard with.

These would work, but are overkill (and more likely to have heat issues like Chemi-con KZG and KZJ). These are probably a more exact match. (Not that I generally encourage buying from Fleabay, but this seller is one of very few that sells genuine caps)

[PCBONEZ]

Re: Need help deciding what to replace my caps on my motherboard with.

Okay, I dunno how much you have read up on the topic.

Those are low ESR caps.
When you replace low ESR caps you want caps rated with:
- The same or more Ripple (mAmps)
- The same or less ESR (Ohms) - ESR is often called Impedance at 100kHz in data sheets.

The LZ data sheet [attached] only shows a 10x20mm for 6.3v 1500uF.
- Are you SURE these are 8mm x about 13mm? [probably 8x14mm looking at LZ data sheet.]
- Can size matters big time in choosing replacement low ESR caps.
Your 8x13mm [8x14mm] in 6.3v/1500uF are apparently a custom ordered size.

As the ESR and Ripple are VERY dependent on the can size [and not dependent on uF or volts at all] we need to look for caps with that can size in the LZ specs sheet and use the specs from that cap.

This will be wrong if you gave the wrong can size wrong...
-
The nearest 8x14 has ESR 0.087 Ohms and Ripple 840 mA.
[That is really crappy specs for a 1500uF on a mobo by the way.]
So:
You need caps with:
8mm diameter, 1500uF, 105C Temp
Volts rating 6.3v - or more
ESR rating 0.087 Ohms - or less
Ripple rating 840 mA - or more

That should not be too hard to find.
.
This site has an international population and you didn't enter your location in your profile so I really can't make suggestions as to where to get them without listing every place on the planet.

~~
Any Teapo that are 6mm or larger diameter should go. [You need to 'spec' them too.]
[Some say 8mm and up but I don't like ordering caps twice or 'reworks' for one board.]
Teapo don't have a good history on motherboards but the 4mm and 5mm rarely fail.
.
.

[arwinbones]

Re: Need help deciding what to replace my caps on my motherboard with.

The markings on the can are G-luxon correction from 1500uF to
1000uF 6.3v
LZ 105C
1034(M)

[arwinbones]

Re: Need help deciding what to replace my caps on my motherboard with.

The other caps are teapo and the caps that are bad are are 8mm by 13mm i believe.