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Help me indentify broken capacitors for gtx 580

post #1 of 12
Thread Starter 
hey guys,
I was preparing for puting waterblock on my gtx 580 (reference design) when i was unable to unscrew last screw. i Tried harder, screwdriver slipt and i broke two capacitors on backside. frown.gif And smaler and larger one. both are ones for gpu memory.
i havent tried to use graphic card since then (maybe it will work but, let try fix it first)
my gpu is in warranty but hell with it, i wont lie, i broke it.
Both broken capacitors fell and i cant find them (i worked in dusty workshop)
i measured larger one and it was 6uF. (measured other ones that look like that one and are on same position on other backsides of memory chips).
i cant measure smaller one (gives infinity / ∞) coz its in circut with other capacitors (dont know if in serial or pararel connection)
So if anyone knows anything about thise 2 capacitors - plz say so smile.gif
if u can messure on urs or just know from some vmod guide..or u are nvidia engineer smile.gif
so i can find and solder them back (soldering wont be a problem)
heres pictures with marked capatitators that i broke

imag0061t.jpg
imag0062y.jpg
imag0068r.jpg
p.s. sorry for bad eng, and not resized photos - taken with mobile camera, so they will suck iven more if resized.
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post #2 of 12
I recommend If it's still under the warranty to simply just go use the warranty.

And those 2 really do look like they exploded/melted.
post #3 of 12
Thread Starter 
They where just broken of, I didnt melt them and they didnt explode thats for sure smile.gif
Dunno what will warranty say about missing parts smile.gif
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post #4 of 12
Unless the RMA inspector isn't paying any attention at all, I highly doubt the card would be accepted.

I'm not certain what the specs of those capacitors are, but you might be able to test other ones of the same type on the card. Otherwise you might consider picking up a dead second hand NVIDIA card that uses similar memory. The capacitors should be the same, or close enough.
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post #5 of 12
Those are almost impossible to replace unless you have hands the size of a mouses and can a soldering iron the same size.

It sure looks to me like they overheated and just plain fell off. Just return it and play dumb. Repeat after me "I don't know why it's not working... are you going to fix it or what?"
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post #6 of 12
It's easy to solder them even my 11 year old son can solder SMT,all it takes is a steady hand,a pair of tweezers and a standard 70w soldering iron.
I will ID the parts in a mo if i can find a hi res image of a ref 580.
All you do is tin the pads then hold the cap down
(non polarised so which end doesnt matter)
over the pad and touch the soldering iron onto the tinned pad,solder will flow and as long as you were holding the cap straight,the second pad will be even easier.
Tweezers no longer necesary just hold the soldering iron to the pad till solder flows.
the smaller one looks like a diode from looking at your pic

Rinse and repeat.

RMA is for defects not user error.
Edited by MightyMission - 5/27/11 at 5:25am
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post #7 of 12
Quote:
Originally Posted by nooisy;13653786 
my gpu is in warranty but hell with it, i wont lie, i broke it.

Blameless' idea is logical.
Take a look at the pic below.
The 2 broken capacitors are circled in red. That 'memory unit' is in green rectangle as well as nearby units.
I think it is a very high likelihood that those capacitors in orange circles are the same spec as the unknown one. Use those as reference should be a very safe bet.

Last but not the least, I applaud your principle of not lying.applaud.gif
Such a virtue is thumb.gif.

(High resolution pic taken from here: http://ixbtlabs.com/articles3/video/zotac-2-p1.html)
post #8 of 12
Quote:
Originally Posted by Techprimus;13653947 
Those are almost impossible to replace unless you have hands the size of a mouses and can a soldering iron the same size.

It sure looks to me like they overheated and just plain fell off. Just return it and play dumb. Repeat after me "I don't know why it's not working... are you going to fix it or what?"

15min fix.. you just need a good 15-30W iron and some rosin core solder.. land a little solder to the 'tabs' first.. then land the cap to the board. Having a little bit of extra solder on the contacts will help 'get it right the first time'.

.. use some tweezers to hold the little buggers while your working..or a small piece of clay or eraser works good too. wink.gif


*and these arent resistors! the overall values are not that important! You just need power through the connections to make the mem IC work again.
post #9 of 12
Thread Starter 
Quote:
Originally Posted by MightyMission;13654021 
I will ID the parts in a mo if i can find a hi res image of a ref 580.

Here it is http://www.ixbt.com/video3/images/ref/gtx580-scan-back.jpg
My is just like that, 100% reference 580.
If u can help indentify smaller one that I need frown.gif
Quote:
Originally Posted by CL3P20;13654657 
*and these arent resistors! the overall values are not that important! You just need power through the connections to make the mem IC work again.

Thx.
I found larger one, I can buy it here localy for 1cent tongue.gif
http://www.mikroprinc.com/proizvodi.aspx?sub=pp&pg=D202030&pid=14063
http://www.mikroprinc.com/proizvodi.aspx?sub=pp&pg=D202030&pid=14064
Will buy 20 so can find near close value of 6pF smile.gif

And now for smaler one.. I can find that small (1.2mm x 0.5mm). Maybe a 1 size bigger. (will fit, but dunno about value)
So can u just say it one more time about overall value not that important? Just take semi-large one? tongue.gif
And should i try to solder out one and messure it? Dunno if possible without demage on pcb.

EDIT: FOUD SMALLER ONE biggrin.gif Same size!!!!! http://kelco.rs/katalog/komponente.php?IDgroupweb=532 God plz make this work, I am going to buy and try it this days
Edited by nooisy - 5/27/11 at 7:48am
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post #10 of 12
The larger one is in a more isolate spot and I could see replacing that, but the smaller one is pretty close to another and not getting solder on it would be very difficult.

Good luck.
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