Abit AA8 Bad Caps...replacement advice needed

[CaptNasty]

Hello all,
I stumbled across this forum a couple of days ago...good stuff.

I've got an old Abit AA8 that's acting up for no apparent reason. It's covered in mostly Rubycon caps, but there are (7) KZG caps on it. Of the (7) KZG caps, (3) are obvioulsy bad (bulging tops).

The (3) bulging caps are like the first two photos. (They have a 3O on one side of them)...I believe that is the letter O and not the number 0.





These next two photos are of some of the others that don't show sign of being bad...they have a 3P on them.





Some advice of what caps to use to replace them would be much appreciated.

Thanks,
Cap

[yyonline]

Re: Abit AA8 Bad Caps...replacement advice needed

Replace all the KZG capacitors, even those that aren't bloating.

Badcaps.net sells some replacements:

https://www.badcaps.net/store/produc...products_id=62
https://www.badcaps.net/store/produc...roducts_id=137

Both of these capacitors exceeds the specifications of the original. If you source capacitors elsewhere, you want to make sure they have adequate ripple handing and low enough ESR. For reference, the specs for your particular KZG are:

6.3V 2200uF
Size: 10mm x 20mm
Ripple: 2550 mA
ESR: 0.013 ohms

When selecting a replacement, you want the same or more ripple, and the same or less ESR.

[RJARRRPCGP]

Re: Abit AA8 Bad Caps...replacement advice needed

It appears that United Chemicon KZG series commonly fail with high temp cases.

Looks like I would go for Nichicon HZs.

https://www.badcaps.net/store/produc...roducts_id=137

[mockingbird]

Re: Abit AA8 Bad Caps...replacement advice needed

HZ is a little overkill.

GC is more than enough.

[CaptNasty]

Re: Abit AA8 Bad Caps...replacement advice needed

HZ is a little overkill.

GC is more than enough.

I bought the HZ's a couple of hours ago (before I saw this post)...am I still alright?

[RJARRRPCGP]

Re: Abit AA8 Bad Caps...replacement advice needed

Topcat is discontinuing the stocking of Samxon caps.

More likely with the HZs being low in price.

KZG spec-wise is roughly the same as HZ, IIRC.

[mockingbird]

Re: Abit AA8 Bad Caps...replacement advice needed

Yes, you're fine.

[CaptNasty]

Re: Abit AA8 Bad Caps...replacement advice needed

Right on! Thanks for all the input....I'll let ya know how it goes.

Cap

[c_hegge]

Re: Abit AA8 Bad Caps...replacement advice needed

KZG spec-wise is roughly the same as HZ, IIRC.

No, KZG is similar to Nichicon HM. HN is lower ESR and HZ is lower again. But the HZs should be fine as replacments for the KZGs on CaptNasty's board.

[RJARRRPCGP]

Re: Abit AA8 Bad Caps...replacement advice needed

I forgot about the HNs, lol.

[CaptNasty]

Re: Abit AA8 Bad Caps...replacement advice needed

The new HZ's came in...the KZG's came off...the new HZ's went on...the board went back in the case aaaand it posted right out of the gate! I stress tested the cpu and memory for a 12 hrs each...no problems at all. I even managed a little overclock.

It looks like my kiddo's gonna get a new rig (or hand-me-down rig) after all.


Thanks for the help, folks!!

[CaptNasty]

Re: Abit AA8 Bad Caps...replacement advice needed

I'm seeking help in another thread here and thought I'd stop in here with an update:

This motherboard is still running strong!

Again, thanks for the help.