So, I have an Intel D865GBF here. It has 5 KZG capacitors I want to replace. However, they are an odd size. I came up with a few scenarios for replacing them, I am curious to get other's opinions on them.
The KZG in question are 6.3V 820uF 8mm x 23mm. Now, the KZG data sheet shows nothing in that size, however I can infer the following based on can size (8x20 is the closest in the specs)
ESR: slightly below 0.021
Ripple: slightly above 1870
CPU VRM
VMR input caps are Nichicon HD, I will leave those alone.
VMR output caps:
7x Chemicon PSA polymer 2.5V 680uF
3x Chemicon KZG 6.3V 820uF 8mm x 23mm
So, here I want replace the KZG. I can see a few options.
Option 1 (I think this is best):
Replace KZG with 2.5V 680uF PSA. This will make all the VRM caps 680uF PSA.
Option 2: Stay with wet caps, increase capacitance to get the needed ESR and ripple. Replace with 6.3V 1500uF MCZ or 10V 1000uF MCZ.
Option 3: Keep capacitance the same, go polymer (820uF polymer)
Option 4: Keep capacitance the same, stay with wet caps (6.3V 820uF MCZ). This may have insufficient ripple and ESR, as the KZG are larger than usual. I don't think this would be wise, but thought I'd throw it out there anyways.
Thoughts on my VRM options?
Next area - there are two of these caps near the memory slot. One measures 2.1V, and the other measures 5V when the PC is powered on. I can't reduce voltage here at least on the one, I could reduce voltage on the other.
What I think I am going to do here is replace w/ 6.3V 820 uF polymer - Nichicon LG perhaps, as UCC doesn't make anything in 8mm for those specs. I think I would want to keep the capacitance the same, as it's not on the CPU VRM. However, would a 3-fold increase in ripple current cause any issues? I know "more ripple is better" but I don't know to what extent you can take that.
Other options - reduce capacitance with poly. Increase capacitance with wet caps to get the needed ESR and ripple. Pretty much the same options as outlined above, but I figure what's best for one area might not be the best for the other.
Thoughts on the two near the memory slot?
As always, I appreciate any knowledge you can share!
The KZG in question are 6.3V 820uF 8mm x 23mm. Now, the KZG data sheet shows nothing in that size, however I can infer the following based on can size (8x20 is the closest in the specs)
ESR: slightly below 0.021
Ripple: slightly above 1870
CPU VRM
VMR input caps are Nichicon HD, I will leave those alone.
VMR output caps:
7x Chemicon PSA polymer 2.5V 680uF
3x Chemicon KZG 6.3V 820uF 8mm x 23mm
So, here I want replace the KZG. I can see a few options.
Option 1 (I think this is best):
Replace KZG with 2.5V 680uF PSA. This will make all the VRM caps 680uF PSA.
Option 2: Stay with wet caps, increase capacitance to get the needed ESR and ripple. Replace with 6.3V 1500uF MCZ or 10V 1000uF MCZ.
Option 3: Keep capacitance the same, go polymer (820uF polymer)
Option 4: Keep capacitance the same, stay with wet caps (6.3V 820uF MCZ). This may have insufficient ripple and ESR, as the KZG are larger than usual. I don't think this would be wise, but thought I'd throw it out there anyways.
Thoughts on my VRM options?
Next area - there are two of these caps near the memory slot. One measures 2.1V, and the other measures 5V when the PC is powered on. I can't reduce voltage here at least on the one, I could reduce voltage on the other.
What I think I am going to do here is replace w/ 6.3V 820 uF polymer - Nichicon LG perhaps, as UCC doesn't make anything in 8mm for those specs. I think I would want to keep the capacitance the same, as it's not on the CPU VRM. However, would a 3-fold increase in ripple current cause any issues? I know "more ripple is better" but I don't know to what extent you can take that.
Other options - reduce capacitance with poly. Increase capacitance with wet caps to get the needed ESR and ripple. Pretty much the same options as outlined above, but I figure what's best for one area might not be the best for the other.
Thoughts on the two near the memory slot?
As always, I appreciate any knowledge you can share!
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