This can't be real

[pentium]

Spotted this on an Intel 775 board. It's the only one that has popped.
I thought Nichicon were ok caps? Just a random bad one?

[Topcat]

Re: This can't be real

Whats the date code on it?

[shovenose]

Re: This can't be real

Lol yeah my intel 955 chipset voard has nichi hm with an 04 datecodes. But they never got a chance to fail cuz my lousy psu fried it.

[pentium]

Re: This can't be real

Whats the date code on it?

If it's still on the bench tomorrow morning I'll get back to you.
Where should I find the date code? Other side of the cap?

[c_hegge]

Re: This can't be real

It usually look something like H0422 (2004, Week 22). Nichicon HM and HN had manufacturing defects which they fixed on 2005, so if the date code is 2005 or older, then that might explain why it failed

[Th3_uN1Qu3]

Re: This can't be real

That looks just like the blown Nichicon HMs that i have right here, i'm 90% sure it's the same cap. So it's from the faulty series.

[PCBONEZ]

Re: This can't be real

The board also has Nichicon VR series which are 85C and can be a problem in poorly cooled systems.
Even the small 4mm & 5mm fail.
.

[pentium]

Re: This can't be real

The cap is marked for "H0510", or 2005, week 10.

[seanc]

Re: This can't be real

It's next to a mosfet, which may get very hot. Checked the PSU?

I have a slew of ASUS 945 boards being "destroyed" by bad ASUS branded Delta PSUs. There's one particular KZG cap that cooks next to a mosfet - meaning the SATA controller stops working

I'm pretty sure the faulty PSU caps causes the mosfet to get very hot, cooking the KZG cap.

Maybe something similar has happened to you?

Edit:
I'm pretty sure the Nichions I pulled out of my SX280 were 05 dated. One had baked, but it is a hot box in there.

[shovenose]

Re: This can't be real

You had a fault asus psu? I need to know about that. Bexuase i have one. And i consider it high end becuae its really heavy and has good 12v ratings for 300w. Is the 300w asua the one you had tha was faulty?

[seanc]

Re: This can't be real

You had a fault asus psu? I need to know about that. Bexuase i have one. And i consider it high end becuae its really heavy and has good 12v ratings for 300w. Is the 300w asua the one you had tha was faulty?

I don't have one, I have four. Five, if you count the first one I threw out, thinking it was a one-off dud.

Open it up and check!!
There is a very tall, slim Capxon 2200uf 6.3v cap that usually failed.
There is also another one that has failed in some, think it may be a 2200uf 16v - can't remember exactly.

[shovenose]

Re: This can't be real

Was it 300w?

[seanc]

Re: This can't be real

I believe it says it'll peak at 300w.

*Traipses off to garage to check*

[Krankshaft]

Re: This can't be real

I believe it says it'll peak at 300w.

I love how cheap PSU manufacturers use that term to deceive people not in the know they see the wattage and ignore the peak after it.

So 300W for a few milliseconds before it lets out the magic smoke. Since most of these crap supplies don't have over current protection.

Where between 300W and 1W is the continuous rated wattage? We will never know probably the engineer at Wan Hung Lo corporation who made it doesn't know either. I'd fathom a guess it's between 150W and 200W.

But if they put the REAL continuous rating on the PSU nobody would buy it since it's not the 90s anymore .

[seanc]

Re: This can't be real

I was right, it does say it 300w peak

[shovenose]

Re: This can't be real

Mine actually says asus in big letters imprinted on Its casing. And it has bigger heatsinks. And it has an 80mmfan on the end not the 120mm on the "bottom"???

[shovenose]

Re: This can't be real

I have verified that my psu is different. It has jamicon secondaries, bigger heatsinks, more density, etc. It also said bestec on of the transformers. So its really a decent psu. Asus s-30fp.

[370forlife]

Re: This can't be real

I have verified that my psu is different. It has jamicon secondaries, bigger heatsinks, more density, etc. It also said bestec on of the transformers. So its really a decent psu. Asus s-30fp.

post pictures of that bestec built asus. I have been trying to find one for a long time now.

[PCBONEZ]

Re: This can't be real

I have verified that my psu is different. It has jamicon secondaries, bigger heatsinks, more density, etc. It also said bestec on of the transformers.

OH COOL!
You might get 300W for a FULL SECOND before it lets out the magic smoke!!

[370forlife]

Re: This can't be real

Bestec power supplies can be pretty solid units. 300W is not that hard to achieve. About 70% of those 500-650W off brand chinese psu's are based off of 300W platforms that some little company in china designed with their highly trained staff of two engineers.