Noob capacitor replacement questions.

[MachineLearning]

Hi all,

Want to replace the caps on my NF4 SLI-DR with aluminum polymers to extend its life. These KZG caps always love to swell up, and a couple already are on this board.

- Is harvesting alpos even a good idea to begin with? I know they should last a very long time, but it's worth asking.

- Is it okay to not match the original capacitance? For example, replacing the 1500uF 16v electrolytics with 470uF 16v caps. Or the inverse, replacing 560uF 2.3v electrolytic caps with 820uF 2.5v polymer caps.

- Is it worth replacing the existing polymers with ones of higher capacitance?

[Macsbeach98]

NF4 SLI-DR should have polys on the VRM as standard.

Use the same voltage rating going up in voltage rating does up the ESR slightly.
As for capacitance dont go down and I wouldnt go up in ridiculous amounts way too much capacitance isnt going to help you at all makes the circuit soggy slow to react.

[austin86]

May 27, 2024 18:17:53 GMT -5 Macsbeach98 said:

NF4 SLI-DR should have polys on the VRM as standard.

Use the same voltage rating going up in voltage rating does up the ESR slightly.
As for capacitance dont go down and I wouldnt go up in ridiculous amounts way too much capacitance isnt going to help you at all makes the circuit soggy slow to react.

IDK about the NF4 but I played around with upping upping capacitance on all sorts of things in the past, if you go to high some boards will not post. 

 But caps are cheap so I would just by new ones for a NF4.