I would prefer to use Nippon Chemi-con caps personally.
BAD CAPS!!
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Originally Posted By: Colt45ws
I used Rubycon and Samxon caps on the motherboard I recently recapped. Im probably going to make another order of Samxons for another board as well.
http://www.badcaps.net/forum/index.php?
Sorry, Samxon caps aren't up to snuff when compared to Nippon Chemicon, Nichicon, or even Panasonic. Samxon caps just a tad better than, say Taicon, Capxon or Leylon. These Asian brands are, in general, subpar in terms of reliability and longevity before the ESR starts to creep up exponentially.
I'm a big fan of all Japanese brands like Rubycon, Nichicon, Elna (audio-approved), Panasonic, Nipponchemi, Nichicon, etc. Jackcon sukks imho.
while that badcaps.com site provides some info on some caps and brands or affiliation and such, but the site is also incomplete in a sense that it doesn't contain any vital information such as how well caps handle during high frequency ripple and for how long.
And yes, so long as your devices such as DeeVeeDee player, LCD monitors (esp. bypass section and most importantly, all the filtering capacitors in the switch mode PSU section) computer PSU, mobo, etc. are still functional, replacing them with extra long life ones available from Digikey will extend on their useful service life considerably.
My wifey's Asus mobo (socket 370 coppermine)is still on my 1st round of Panasonic low ESR caps since the day it's been recapped 7yrs ago that the mobo still works like new, although functionally-speaking, that mobo is crawling like a slug due to slow processor.
Q.
I used Rubycon and Samxon caps on the motherboard I recently recapped. Im probably going to make another order of Samxons for another board as well.
http://www.badcaps.net/forum/index.php?
Sorry, Samxon caps aren't up to snuff when compared to Nippon Chemicon, Nichicon, or even Panasonic. Samxon caps just a tad better than, say Taicon, Capxon or Leylon. These Asian brands are, in general, subpar in terms of reliability and longevity before the ESR starts to creep up exponentially.
I'm a big fan of all Japanese brands like Rubycon, Nichicon, Elna (audio-approved), Panasonic, Nipponchemi, Nichicon, etc. Jackcon sukks imho.
while that badcaps.com site provides some info on some caps and brands or affiliation and such, but the site is also incomplete in a sense that it doesn't contain any vital information such as how well caps handle during high frequency ripple and for how long.
And yes, so long as your devices such as DeeVeeDee player, LCD monitors (esp. bypass section and most importantly, all the filtering capacitors in the switch mode PSU section) computer PSU, mobo, etc. are still functional, replacing them with extra long life ones available from Digikey will extend on their useful service life considerably.
My wifey's Asus mobo (socket 370 coppermine)is still on my 1st round of Panasonic low ESR caps since the day it's been recapped 7yrs ago that the mobo still works like new, although functionally-speaking, that mobo is crawling like a slug due to slow processor.
Q.
Yes, but it was cheaper to do them than rubys all the way. I ordered rubys to do the secondary CPU filtering, which is what failed, then decided I should do the rest of the board as well.
Its currently runs at 100% load 24/7 with an overclocked Athlon XP-M. CPU temps in excess of 70C with a case temp a bit over 45C. Around 7000 hours on the rebuild so far with these conditions with no failures so far. Definitely a torture test. Ill run it like this until it can no longer do it.
Its currently runs at 100% load 24/7 with an overclocked Athlon XP-M. CPU temps in excess of 70C with a case temp a bit over 45C. Around 7000 hours on the rebuild so far with these conditions with no failures so far. Definitely a torture test. Ill run it like this until it can no longer do it.
Heh. Popped the cover on my old Pentium 4 HT system just now with a Biostar P4M900-M4 board. Found it has a blown KZG on the VRM input. Going to order replacements for the VRM and most of the board as other than the VRM which has Chemicon caps, its covered in OST.
This board was never really stable from the get go and its gotten worse.
This board was never really stable from the get go and its gotten worse.
I think I have decided on this list of capacitors. I was largely limited by what was in stock at mouser as digikey didnt have anything that matched the ESR and Ripple of the KZGs on the VRM.
I ended up going one or two series better than the originals in order to find something in stock.
4x 3300uf 6.3v 10x25mm nichicon HZ was UCC KZG
3x 1500uf 16v 10x20mm nichicon HZ was UCC KZG
13x 1000uf 6.3v 8x11.5mm nichicon HM was OST RLP
1x 470uf 16v 8x15mm panasonic FM was OST RLX
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I've run into a rash of these as well. Dell Dim 5150 PS has two that I've found. Dell 19" mon acting really weird, I suspect same thing. Found a bulging 400v cap in another monitor PS I need to replace. Neighbor gave me a 4 yr old iMac that quit. Opened it up and found 4 bulging caps on the MB.....time to warm up the iron.
This reminds me of the defective rivets that found their way into all sorts of ships decades ago.
This reminds me of the defective rivets that found their way into all sorts of ships decades ago.
Originally Posted By: Colt45ws
as digikey didnt have anything that matched the ESR and Ripple of the KZGs on the VRM
The KZGs are obviously defective product, I don't know if I'd put any trust in their spec sheets.
Whenever I've replaced caps, I just use the Panasonic FC and FM series that Digi-Key sells.
http://www.badcaps.net/forum/showthread.php?t=2280
as digikey didnt have anything that matched the ESR and Ripple of the KZGs on the VRM
The KZGs are obviously defective product, I don't know if I'd put any trust in their spec sheets.
Whenever I've replaced caps, I just use the Panasonic FC and FM series that Digi-Key sells.
http://www.badcaps.net/forum/showthread.php?t=2280
I recapped an old Soltek Nforce2 board for an old Athlon XP back in the day. It worked perfect after and my buddy still uses that system occasionally.
Originally Posted By: brianl703
Originally Posted By: Colt45ws
as digikey didnt have anything that matched the ESR and Ripple of the KZGs on the VRM
The KZGs are obviously defective product, I don't know if I'd put any trust in their spec sheets.
Whenever I've replaced caps, I just use the Panasonic FC and FM series that Digi-Key sells.
http://www.badcaps.net/forum/showthread.php?t=2280
Yeah, but I even used the spec sheets for the OST caps to try to come up with a similar product. My thinking is, while they may not be correct, the engineer would have used them when when specing parts. So Im trying to find something close to the spec basically.
Originally Posted By: Colt45ws
as digikey didnt have anything that matched the ESR and Ripple of the KZGs on the VRM
The KZGs are obviously defective product, I don't know if I'd put any trust in their spec sheets.
Whenever I've replaced caps, I just use the Panasonic FC and FM series that Digi-Key sells.
http://www.badcaps.net/forum/showthread.php?t=2280
Yeah, but I even used the spec sheets for the OST caps to try to come up with a similar product. My thinking is, while they may not be correct, the engineer would have used them when when specing parts. So Im trying to find something close to the spec basically.
Ended up changing my mind a bit. Going to poly mod the VRM output.
4x 1500uf 2.5v 10x13mm nichicon FPCAP R7 was UCC KZG 3300uf 6.3v
3x 1500uf 16v 10x20mm Rubycon MCZ was UCC KZG
13x 1000uf 6.3v 8x15mm nichicon HE was OST RLP
1x 470uf 16v 8x15mm panasonic FM was OST RLX
4x 1500uf 2.5v 10x13mm nichicon FPCAP R7 was UCC KZG 3300uf 6.3v
3x 1500uf 16v 10x20mm Rubycon MCZ was UCC KZG
13x 1000uf 6.3v 8x15mm nichicon HE was OST RLP
1x 470uf 16v 8x15mm panasonic FM was OST RLX
Check out the hot spots!
Smoking!
http://colt45.ws/misc/p4m900kzg.jpg
Popped one was right between two hot spots. I had a 2 month old case fan fail; locked up tight. It was right after that I noticed it had popped. Coincidence? I think not.
http://colt45.ws/misc/p4m900done.jpg
Dropped it back in. Plugged it in to minimal accessories, and it fired right up.
Its funny, it does not look like I did anything with the rest of the board. Because the nichicon HEs have the same color scheme and vent stamp as the OST garbage they replaced.
Running a Prime95 burn in. Also I turned on the 'top performance' BIOS option just for [censored] and giggles.. Even when this board was new it wouldnt run with that option enabled. Curious if a set of quality caps will change that.
Dropped it back in. Plugged it in to minimal accessories, and it fired right up.
Its funny, it does not look like I did anything with the rest of the board. Because the nichicon HEs have the same color scheme and vent stamp as the OST garbage they replaced.
Running a Prime95 burn in. Also I turned on the 'top performance' BIOS option just for [censored] and giggles.. Even when this board was new it wouldnt run with that option enabled. Curious if a set of quality caps will change that.
*giggle snort*
After about 20 minutes of run time, I heard a sound not unlike someone opening a can of liquid refreshment. I turned around and the machine was off. Dead and wouldnt come on.
I checked the board over, thinking I messed up and it shorted out; couldnt find anything.
So I went on to test the power supply. Plugged it in and checked for 5VSB. Nope. UhOh. I think we have our culprit. I shutdown one of my other machines and ganked its power supply. The newly recapped board fired right up on it.
Thats a project for tomorrow. I opened it but I dont see anything obviously wrong like a short or similar, but I have not checked real carefully.
After about 20 minutes of run time, I heard a sound not unlike someone opening a can of liquid refreshment. I turned around and the machine was off. Dead and wouldnt come on.
I checked the board over, thinking I messed up and it shorted out; couldnt find anything.
So I went on to test the power supply. Plugged it in and checked for 5VSB. Nope. UhOh. I think we have our culprit. I shutdown one of my other machines and ganked its power supply. The newly recapped board fired right up on it.
Thats a project for tomorrow. I opened it but I dont see anything obviously wrong like a short or similar, but I have not checked real carefully.
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I had a PSU launch a cap right off the PCB once! It hit so hard it dented the PSU casing!!!
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