First post, by Masejoer
As we all know, ultra-low-ESR electrolytic caps are a thing of the past. A lot of old caps also were of low quality and no datasheets are available online today for many so we cannot look up the characteristics of the factory capacitors. That said, we also know that a lot of boards with bulging or leaking caps still "work" stable today when stress tested, so many motherboards aren't necessarily that picky about the critical components having elevated ESR values.
A lot of people online seem to have good results using various poly caps for boards, even though I suspect that many of them have much lower ESR values than the caps they replaced.
I'm trying to find what polymer options may work in general for boards , from socket 3, up to socket 462. Old caps like Tayeh don't have specifications available, but I'm hoping to pick up some bulk through-hole polys to have some inventory that will likely work on a majority of motherboards. Is there any better guidance that anyone can provide on what "may" work in certain boards? What about better identifying what each cap is for on some boards where caps are distributed throughout the board, and not specifically next to the CPU socket, without probing each while running? I imagine many caps near the CPU can be of lower Voltage ratings (than 6.3 or 10V) due to limited vcore.
Example 1:
Abit BP6
13* 1500uF 6.3V 8mm (3.5mm lead-spacing) Tayeh LE
12* 1000uF 10V 8mm (3.5mm lead-spacing) Tayeh RB
7* 100uF 16V 6.3mm (2.5mm lead-spacing) Tayeh MI
1* 22uF 16V 4.25mm (2.0mm lead-spacing) Tayeh MI
Possible replacements:
13* 820uF - RL80J821MDN1
12* 470uF - RL80J471MDNA
7* 100uF - RS81C101MDN1
1* 22uF - PLF1D220MCL2
Example 2:
EPoX MVP3G5
10* 1000uF 6.3V 8mm (3.5mm lead-spacing) Tayeh
3* 470uF 16V 8mm (3.5mm lead-spacing) GSC
7* 100uF 16V 6.3mm (2.5mm lead-spacing) Hermei
3* 10uF 25V 5.0mm (2.5mm lead-spacing) Tayeh
Possible replacements:
10* 470uF - RL80J471MDNA
3* 270uF - RL81C271MDN1
7* 100uF - RS81C101MDN1
3* 10uF - PLF1E100MCL7TP
I have maybe 20 boards that I'd like to recap now, and would prefer polys wherever possible, especially required near the VRMs/CPUs where ultra-low ESR electrolytics are no longer available.
I'm just looking for further guidance over what I've sporadically researched over the last year regarding this topic.