gdjacobs wrote:No, I haven't used these ones. Yes, using caps rated for higher voltage will work fine. Also, rated hours will be largely meaningless for this application as they'll be running well under spec.
Anyway, UCC/NCC is generally excellent so long as you stay away from their KZG and KZJ series. Also, these are poly caps, so double plus good.
canthearu wrote:I've ordered some polymer caps to do a rebuild of a socket A board as well. But just the vulnerable caps around the CPU and chupset.
ph4nt0m wrote:That's true, Rubycon discontinued all MxZ series in 2011 due to low demand from OEMs. Some NOS could still be found, though those offered by Chinese sellers are most likely fake.
There's one thing to note about ultra low ESR caps. Their electrolyte is very temperature sensitive, so those caps are rated for 2,000 hours usually. Caps with a bit higher ESR, though still considered low, are 5,000 to 6,000 hours rated usually, though some models like Sanyo WA are 8,000 to 10,000 hours rated. High VRM temperatures and hot air exhausted by CPU coolers can make ultra low ESR caps die in just a few years of regular usage.
gdjacobs wrote:You can go with these 16V rated UCC polymers.
https://www.digikey.com/product-detail/ ... ND/5824538
They have a little bit more capacitance and are cheaper than the Nichicons.
gryffinwings wrote:The capacitors linked below were the ones that were recommended to me, also I think with the temperature that most capacitors are rated at 105*C is quite a bit higher than what case temp is going to be at, my CPU isn't getting much above 60*C. And my plan is to change out the fans in the case for some Arctic Cooling fans to maintain reliable and adequate air flow. So I do not think temperature is going to be an issue.
ph4nt0m wrote:gryffinwings wrote:The capacitors linked below were the ones that were recommended to me, also I think with the temperature that most capacitors are rated at 105*C is quite a bit higher than what case temp is going to be at, my CPU isn't getting much above 60*C. And my plan is to change out the fans in the case for some Arctic Cooling fans to maintain reliable and adequate air flow. So I do not think temperature is going to be an issue.
105*C is when the electrolyte starts to boil and you don't want it to happen. There is such thing as thermal derating. Caps exposed to high temps experience high current leakage and their capacitance decreases faster over time. BTW 2,000 hours for an ultra low ESR cap ain't much. It's just 83 days non-stop. There is a rule of thumb for electrolytic capacitors that their service life doubles for every 10*C below the rated maximum. So, 2,000 hours at 105*C = 32,000 hours at 65*C.
gdjacobs wrote:HM caps brewing up some trouble. Good times.
gryffinwings wrote:gdjacobs wrote:HM caps brewing up some trouble. Good times.
Indeed, disassembly will start today, so I can identify what specs the VRM caps near the parallel port are, I'll order some more caps for those once I find out.
gdjacobs wrote:Brilliant! Congrats!
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