Bulging Samxon GD(M)

[Ray_S]

Hi guys,

Thought I'd better de-lurk and ask for an opinion before something blows up.

This motherboard has 2 Samxon GD(M) 680uF 16v 10x12.5 caps around the VRM area and only one is bulging so I gather it or both will need replacing soon, the board is working fine ATM.

What would be the recommended replacement caps?

Thanks.

[t.j.]

Re: Bulging Samxon GD(M)

https://www.badcaps.net/store/produc...products_id=50 measure what ya got to confirm size, but ones above will work for ya! an by pic the both look bulged! take a clear over head shot of whole board an post it please.

[mockingbird]

Re: Bulging Samxon GD(M)

Samxon GD is a reliable series... They bulged around your VRM in, so I suggest you take a good look at your power supply which must have caused them to bulge. Also, what t.j. referenced might not be a good match. I didn't check the specs, but I know that ZL is not equivalent to GD.

These are a better match:
https://www.badcaps.net/store/produc...roducts_id=178

[Ray_S]

Re: Bulging Samxon GD(M)

Thanks guys, the board is 5 years old and ran with the same processor (Q6600 B3, stock no OC) and PSU (CoolerMaster RealPower M700) for all that time and was taken out of service due to an upgrade however it was going to be rehoused.

Will try and get some better pics up.

Locally I can get hold of Rubycon ZLH, Panasonic FK and FR in this spec, would any of these series be suitable and a good match?

[mariushm]

Re: Bulging Samxon GD(M)

FR would work, then ZLH, then FK....

[Ray_S]

Re: Bulging Samxon GD(M)

Thanks for the recommendation.

I've added some more pics, hope they are clearer.

[mockingbird]

Re: Bulging Samxon GD(M)

16V 680uF 10mm wide:

Samxon GD: 1540 0.026
Panasonic FR: 1290 0.043
Panasonic FK: 900 0.063
Rubycon ZLH: 1330 0.039

The ESR is too high and the ripple too low.

Nichicon HZ: 2280 0.012

I see a UCC KZJ series cap near the PCIe x16 slot. You should replace that too while you're at it.

[Ray_S]

Re: Bulging Samxon GD(M)

16V 680uF 10mm wide:

Samxon GD: 1540 0.026
Panasonic FR: 1290 0.043
Panasonic FK: 900 0.063
Rubycon ZLH: 1330 0.039

The ESR is too high and the ripple too low.

Nichicon HZ: 2280 0.012

I see a UCC KZJ series cap near the PCIe x16 slot. You should replace that too while you're at it.

Somehow I figured it would be only you guys that are able to recognise caps from the vent design.

You are correct it is a KZJ 10x12.5 10v 1000uF but shows no signs of visible fatigue, so again what would be the recommended replacement?

The rest of the caps are Rubycon, Sanyo, Nichicon and no idea what the polymer caps are atm for those that are wondering.

Looks like I'll be importing caps then if I can't find them locally.

[mockingbird]

Re: Bulging Samxon GD(M)

The polymers look like SEPC. Good stuff.

KZG/KZJ oftens how no signs so replace it to be safe. This is a perfect replacement:
https://www.badcaps.net/store/produc...products_id=47

Isn't Farnell HQ in the UK?

[Ray_S]

Re: Bulging Samxon GD(M)

Thanks again.

Yeah we have Farnell and RS overhere but they don't appear to be stocking motherboard grade electrolytic caps these days either because they have been discontinued or they just can't be bothered.

From their current listings.

680uF 16v 10x12.5 105℃

RS: Panasonic FK, FR. Rubycon ZLH.
Farnell: Panasonic FK, FR.

1000uF 10v 10x12.5 105℃

RS: Panasonic HD, NHG. Nichicon VY. Rubycon YXJ, ZLH.
Farnell: Panasonic HD, M, NHG.

So it looks like the webshop will probably be getting my business.

[mariushm]

Re: Bulging Samxon GD(M)

If all he can source locally are those series, then FR and ZLH will do.

It looks like there is space there to go for

Panasonic FR 680uF 25v : 10x16mm 1790mA ripple 0.028 mOhm esr

Same with Rubycon ZLH:

ZLH 25v 10x16 , 1760mA ripple, 0.028mOhm esr

In fact you're probably find 25v rated caps easier, as 680 is close to what's in use in monitors.

Farnell should have these.

Nichicon HZ it's unlikely they'll have, maybe they'll have Nichicon HM locally if you're lucky but I doubt it.

I also doubt you really need very low esr caps for these, as they're 16v rated. The esr is important after the voltage is regulated, hence why the board uses polymers by the processor.
They probably used Samxon GD due to their low height, not necessarily for their specs.

And you can probably go for 820uF 16v capacitors instead of 680uF ones, it's close enough to 680uF that I don't think it would matter.

[mockingbird]

Re: Bulging Samxon GD(M)

Better to buy from Topcat, pay the $8 international shipping and a few dollars for the few capacitors than pay Farnell's shipping charges (I think it was $12 last time I ordered - not sure how much they charge in the UK), not to mention taxes, and he gets the right caps.