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Old 08-17-2009, 10:44 AM   #41
yanz
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Default Re: For those that swear by KZG... :(

Quote:
KZJ suffer a bad fate too
well, we still have some deer-lookalike psu with each rail using 2x 1800uF/16v KZJ and none of those PSU have failed yet. psu are some p4s and athlon xp in our net cafe. i glad i conducted that experiment in that 2006. it's been 3 years..
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Old 08-17-2009, 11:15 AM   #42
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Default Re: For those that swear by KZG... :(

Quote:
Originally Posted by ant3202
KZJ suffer a bad fate too



only one is pic showing.. and i would like to know what capacitance and voltage are those black KZJ? usually chemicon use three line date code style, and those KZJ are just different, they use 2 lines...
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Old 08-17-2009, 11:24 AM   #43
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Default Re: For those that swear by KZG... :(

oh wait, maybe it just the angles..
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Old 09-21-2009, 06:20 PM   #44
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Default Re: For those that swear by KZG... :(

These are some leaking Chemi-con KZG from a HP Motherboard. I replaced them with panasonic and the mosfets gave off smoke. I then discovered two pins on the CPU socket were touching!
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Old 09-21-2009, 06:49 PM   #45
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Default Re: For those that swear by KZG... :(

Quote:
Originally Posted by c_hegge
These are some leaking Chemi-con KZG from a HP Motherboard. I replaced them with panasonic and the mosfets gave off smoke. I then discovered two pins on the CPU socket were touching!

Yup, thats lga775 for ya. Great idea intel.
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Old 09-30-2009, 09:24 AM   #46
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Default Re: For those that swear by KZG... :(

Gateway Profile 5 => 17" & 19" nVidia 5200 video board ~ has [4] KZG 6.3v 1500uF ~ ambient cooled card => [1] only slightly bulged on bottom & proved to
be the culprit ~ undocumented troubleshooting of these machines // removing the
video board enables intel northbridge video [*note* the 15" versions all came stock
without the nVidia card & the Profile 5.5 have a completely different system board
and also a completely different ATI video board in the same case]
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Old 11-07-2009, 03:25 AM   #47
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Default Re: For those that swear by KZG... :(

Did Chemicon ever fix the problem with KZG and KGJ caps?

I just replaced several KZGs, even though none bulged or had ESRs above 0.01 ohm.
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Old 11-07-2009, 04:25 AM   #48
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Default Re: For those that swear by KZG... :(

That should have been KZG & KZJ.
.
No one official has even admitted there is a problem.
.
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Old 03-26-2013, 03:53 AM   #49
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Default Re: For those that swear by KZG... :(

personally I had several problems with KZG series
in my case I see bulged 820mf, 2200mf and 3300mf /all 6.3v
(specially the 3300 mf is the worst)
I recommend avoid and destroy chemicon KZG series like the plague

/thread
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Old 03-26-2013, 05:12 AM   #50
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Default Re: For those that swear by KZG... :(

i need to post my video of several thousand new kzg being poured into the dumpster.
i got them in a surplus buy and found they cant even take power supply duty.popped in 6 months.even crapxon last longer than that.
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Old 03-26-2013, 06:28 AM   #51
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Default Re: For those that swear by KZG... :(

Quote:
Originally Posted by kc8adu View Post
i need to post my video of several thousand new kzg being poured into the dumpster.
i got them in a surplus buy and found they cant even take power supply duty.popped in 6 months.even crapxon last longer than that.
Please do!
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Old 03-26-2013, 10:33 AM   #52
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Default Re: For those that swear by KZG... :(

I hate KZG. Intel still uses them on some of their new boards like their DH61BE on the VRM...and almost every Dell computer that was made from 2005-2008 that comes in usually has bad KZG

Quote:
Originally Posted by kc8adu View Post
i need to post my video of several thousand new kzg being poured into the dumpster.
i got them in a surplus buy and found they cant even take power supply duty.popped in 6 months.even crapxon last longer than that.
Yes please do
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Last edited by Pentium4; 03-26-2013 at 10:35 AM..
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Old 03-26-2013, 04:12 PM   #53
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Default Re: For those that swear by KZG... :(

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Originally Posted by kc8adu View Post
i need to post my video of several thousand new kzg being poured into the dumpster.
You let me down big time. You should have poured them onto a fire
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Old 03-26-2013, 10:37 PM   #54
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Default Re: For those that swear by KZG... :(

Hmm... I have a motherboard full of KZG, and it's been running almost 24/7 since 2007 with no issues. As for the power supply, the original Liteon power supply died (low 5vsb), then the Hipro replacement died (same problem, visually confirmed bad caps on this one), then the Dynex replacement for that died too (erratic operation). Now, I'm running an ancient Astec out of a broken Gateway from 1999. It's full of Nichicon (LQ for the primaries, PX(?) for almost everything else). It should last a while. These caps are so old that the primaries say "CE" (French for "Electrolytic Condenser", covered in another thread) and refer to the voltage rating as "WV" (working voltage)...

Last edited by cheapie; 03-26-2013 at 10:42 PM..
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Old 03-27-2013, 01:59 AM   #55
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Default Re: For those that swear by KZG... :(

^ You are fortunate that those KZGs have not failed yet after all that time, though it's possible they have since they can easily fail without any indication in terms of sensory (and your computer may not POST if you reboot...). KZGs will inevitably fail because there is something fundamentally wrong with their electrolyte (a chemical process takes place that cannot be deterred in the long run), somewhat unlike mediocre (at best) Taiwanese capacitors where it's more the impurities of the aluminimum/foil that leech into the electrolyte and cause failure (which can be at least prolonged if stress and heat is kept away from such capacitors). However, unlike cheap Chinese and Taiwanese capacitors, KZG still have good aluminum and foil and besides their electrolyte are high quality and Japanese so if you keep them away from heat and stress they could last a while too (wouldn't be surprised if they didn't, though...)... I'd recommend replacing them all either way.

Quote:
Originally Posted by Pentium4 View Post
I hate KZG. Intel still uses them on some of their new boards like their DH61BE on the VRM...and almost every Dell computer that was made from 2005-2008 that comes in usually has bad KZG
Not surprised they failed, the VRM circuit is one of the most stressful parts of the motherboard (if not the most).

Last edited by Wester547; 03-27-2013 at 02:03 AM..
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Old 04-12-2013, 01:13 PM   #56
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Default Re: For those that swear by KZG... :(

Just saw this review, seems like Asus still likes Total Krap and KZG

http://forums.tweaktown.com/asus/510...od-review.html
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Old 04-12-2013, 05:24 PM   #57
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Default Re: For those that swear by KZG... :(



Another ASUS RMA on just a year old board today... Yesterday I got a P5RD1-VM full of bloated KZGs... Lasted 7 years though I think.

Avoid motherboards with APAQ polymers like the plague. Also, I don't trust the quality of HEXFETs Gigabyte uses...
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Old 04-13-2013, 05:39 AM   #58
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Default Re: For those that swear by KZG... :(

"HexFET" was a trademarked name of International Rectifier, until they sold that part of their line to Siliconix (Ironically!) about 5 years ago. Siliconix is part of Vishay. Are you seeing problems with Vishay-Siliconix parts of the older HexFET type? The reason IR sold the line is because it was basically at the limit of what the technology could do - especially in R(DS On). AFAIK, modern high-performance parts don't use any form of the hexagonal cell design technology.
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Old 04-13-2013, 06:57 AM   #59
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Default Re: For those that swear by KZG... :(

I cross-referenced Chemi-Con KZG to new KZN series (if you can get them!), but even though ripple current for KZN is slightly better, the ESR is not as good as KZG.
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Old 04-14-2013, 02:13 PM   #60
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Default Re: For those that swear by KZG... :(

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Originally Posted by PeteS in CA View Post
"HexFET" was a trademarked name of International Rectifier, until they sold that part of their line to Siliconix (Ironically!) about 5 years ago. Siliconix is part of Vishay. Are you seeing problems with Vishay-Siliconix parts of the older HexFET type? The reason IR sold the line is because it was basically at the limit of what the technology could do - especially in R(DS On). AFAIK, modern high-performance parts don't use any form of the hexagonal cell design technology.
Interesting...

Just guessing that they're the weakest link on Gigabyte boards, that's all... I have no other basis for my assumption since I can't imagine what else would cause Gigabyte "Ultra Durable" boards to conk out... On Asus boards I'm pretty sure that it's those Apaq Polymers degrading over a short amount of time.
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