Please note the capacitor explosion of P5K-E

[NewBeetle]

The capacitor of my P5K-E exploded suddenly.
A big load never hung.
The loud sound and the smoke and the smell......

Condition
M/B : ASUS P5K-E
CPU : E6700
PSU : OCZ PowerStream 520W
Vcore : 1.65V
Clock : 4.5GHz
CPU Temp : -70C

Image of exploding capacitor


I repaired it.

Removal of capacitor


Replacement of capacitor(1000μＦ/16V)


Fortunately, CPU and the power supply were safely.
Mobo came to work when capacitor was exchanged.
I tested it with E6700 and P4-631.
It seems to have made the repair good.

E6700 MAX FSB on water


P4-631 MAX Clock(SPi-1M) under LN2
(There is a bug for CPU-Z, and SetFSB is correct)


DEWA DEWA～
NewBeetle

[SoulsCollective]

ZOMGWTFBBQ! Nice repair job, though.

[justin_c]

so it just unravelled itself?
goes of on a kaboom, then unravels this black rubber?

[eva2000]

pushing a bit too hard on oc's there I guess

nice repair job there

[mutapha]

what is the value of replaced capacitor?

[celemine1Gig]

I'd guess that at 4.5GHz and 1.65V the ripple current was just too high for that poor cap. Please measure the resistance of the caps contacts to the empty pad for another cap, on the right next to the FETs. If they are directly connected, I'd advise you to add another cap there and have a look at the ripple current values of the caps that you add. Perhaps it'll help your overclock.

[ineedaname]

wow I've never heard of a sold cap exploding before. It looks pretty crazy. Did it look like that right away or did you pull at the capacitor cap first?

Nice repair job.

[Morais]

where is the aluminium cover? did it hit the ceiling?

[NewBeetle]

so it just unravelled itself?
goes of on a kaboom, then unravels this black rubber?

Yes, it unravelled itself by explosion.

what is the value of replaced capacitor?

1000μＦ/16V

Left : original capacitor cap ---------------------- Right : replaced capacitor

I'd guess that at 4.5GHz and 1.65V the ripple current was just too high for that poor cap. Please measure the resistance of the caps contacts to the empty pad for another cap, on the right next to the FETs. If they are directly connected, I'd advise you to add another cap there and have a look at the ripple current values of the caps that you add. Perhaps it'll help your overclock.

Thank you very much for your advice.

wow I've never heard of a sold cap exploding before. It looks pretty crazy. Did it look like that right away or did you pull at the capacitor cap first?

Nice repair job.

The image shows the state after the explosion almost.
The cap of the capacitor flew like the bullet.

where is the aluminium cover? did it hit the ceiling?

Yes, it hit the ceiling and flew somewhere in the room.
I was able to find it by the next day's coming.

[friedchips]

Wow that thing could've put somebodys eye out.... Nice repair BTW.

[G H Z]

That looks pretty bad NewBeetle

Well if something is going to blow up, it's better a cap than something else like a CPU. Thats an interesting bug with CPU-Z, I have not seen it report falsely for quite some time.

[TTmodder]

OT: The capacitors last word: Blow me b****!!!

[eva2000]

NewBeetle you need to bench with safety googles/glasses

[El Snorro]

I thougt aluminium caps did not explode/leak that easy?
What was the vcore you were running at the time of the explosion?

[stealthbomber]

So much for solid caps

Shouldn't you have replaced the exploded cap with something slightly better higher rated max voltage/capacitance just for good measure?

[ineedaname]

yea he should bench behind some ballistic glass. :P

[Brian y.]

yea he should bench behind some ballistic glass. :P

no kidding!

That was a very nice repair job though

[ziddey]

so much for the solid cap hype

[celemine1Gig]

so much for the solid cap hype

Great conclusion.

The solid caps are indeed better and you could argue as long as you wanted. This wouldn't change. It's the circuit design that makes the difference. I doubt that Asus designed this particular board for someone running his CPU at 4.6GHz with 1.65V VCore. That's the point.

Edit: Sorry, of course I meant 4.5Ghz with 1.65V VCore.

[NewBeetle]

Thank you for your comment, friedchips-san, G H Z-san, TTmodder-san, eva2000-san, El Snorro-san, stealthbomber-san, ineedaname-san, White B-san, ziddey-san, celemine1Gig-san

That looks pretty bad NewBeetle

Well if something is going to blow up, it's better a cap than something else like a CPU. Thats an interesting bug with CPU-Z, I have not seen it report falsely for quite some time.

It seems not CPU-Z's bug but P5K-E's BIOS bug.
Because CPU-Z is OK for P4-631 with P5B-D or P5K or P965-S.

NewBeetle you need to bench with safety googles/glasses

As I am a chemist, I always do benches putting on safety glasses and experiment wear.

I thougt aluminium caps did not explode/leak that easy?
What was the vcore you were running at the time of the explosion?

Vcore was 1.65V and system was not running bench but idle.

So much for solid caps

Shouldn't you have replaced the exploded cap with something slightly better higher rated max voltage/capacitance just for good measure?

As 1000μＦ/16V capacitors are used with P5B-D's EATX-12V line, I used it.
And it seems OK because I can get WR with this repaired board.

yea he should bench behind some ballistic glass. :P

Always I put it.

no kidding!

That was a very nice repair job though

It's OK because I like joke.

Great conclusion.

The solid caps are indeed better and you could argue as long as you wanted. This wouldn't change. It's the circuit design that makes the difference. I doubt that Asus designed this particular board for someone running his CPU at 4.6GHz with 1.65V VCore. That's the point.

Edit: Sorry, of course I meant 4.5Ghz with 1.65V VCore.

It is as you say.
ASUS produces good boards.
I think the defect of the capacitor caused this accident.

DEWA DEWA ～
NewBeetle

[celemine1Gig]

It is as you say.
ASUS produces good boards.
I think the defect of the capacitor caused this accident.

DEWA DEWA ～
NewBeetle

Hi NewBeetle,

I don't even think that the capacitor was defective to begin with. I rather think that it was just not rated high enough to withstand the extreme current draw of your CPU at 4.5GHz with 1.65V. It seems that this cap is filtering the 12V-EPS 8-pin power connector that is located right next to it. The CPU draws it's main power from there.
As I said, I think the ripple current just got too big for the cap, thus it exploded. If there would've been two of the these solid caps in parallel, I think they would still be OK. But the single one was just not up to the extreme task. Perhaps your replacement cap has got a higher ripple current rating, or it's just the larger physical size that let's it withstand more strain and that's why it's still OK.

[K.I.T.T.]

The caps on my P5K-E appear to be different:

[stealthbomber]

Looks like your board has slightly higher rated caps, NewBeetle's been ripped off, typical Asus, even their high end boards are inconsistent in the parts used

[mukmaster]

LOL dude thats awful , but may i ask where i the shell of the cap ?

mukmaster

[ineedaname]

man that really sucks. I can't believe they used lower rated caps on new beetle's board.