Epyc capacitor values

[Faust]

Anyone know what values the caps are on the bottom of the Epyc cpu packages? I bought a few duds off ebay with the hopes of repairing them. My meter however is not sensitive enough to read a value on the cap array which makes me think it must be in the PicoFarad range.

 

[Faust]

I was able to get a reading on a different one. 2.75uf. that's huge for such a tiny cap! it's .8mm by 1.6mm which would make it 0306 package. I don't know that i've ever seen anything that small with a capcitance over .47uf

 

[RolloZ170]

at only 2 volts this is possible

 

[Faust]

did some more probing. it appears to be a single interdigitated capacitor instead of an array of 4. that helps explain the high capacitance.

 

[Faust]

closest I can find is https://www.mouser.com/ProductDetail/KYOCERA-AVX/W2L14D225MAT1A?qs=T8npLvK5duGOD8r%2B3Anvqw== but the size I need would be w4 not a w2, but according to their datasheet chart https://www.mouser.com/datasheet/2/40/AVX_11192019_IDC_Low_Inductance-1667755.pdf they don't make a w4 that goes up that high in capacitance.

I wonder if I can bodge on the larger size. I know a slightly larger cap will technically have higher inductance, but maybe that doesn't matter enough

 

[homemade]

closest I can find is https://www.mouser.com/ProductDetail/KYOCERA-AVX/W2L14D225MAT1A?qs=T8npLvK5duGOD8r%2B3Anvqw== but the size I need would be w4 not a w2, but according to their datasheet chart https://www.mouser.com/datasheet/2/40/AVX_11192019_IDC_Low_Inductance-1667755.pdf they don't make a w4 that goes up that high in capacitance.

I wonder if I can bodge on the larger size. I know a slightly larger cap will technically have higher inductance, but maybe that doesn't matter enough

Did you find the correct capacitor for this anywhere?