Guys, I have a question that beg some deeper explanation. For Vcore input caps replacement (used Chemi-con KZG (!) with 1000uF 16V d8) should I use polymer with low capacitance but very high ripple current... or elyte cap with same capacitance, only higher ripple current?
3 phase Vcore VRM, ASRock 775i65G mobo, input 4x Chemi-con KZG 1000uF 16V d8, output 5x 1500uF Samxon GE 1500uF 6.3V + 1x 680uF 4V polymer cap.
Replacement for the input either:
elyte Nichicon HZ 1000uF 16V d8, ripple current 2.88A (UHZ1C102MPM6)
http://www.digikey.com/product-detai...PM6-ND/1628340
polymer Nichicon RNU 330uF 16V d8, ripple current 6.1A (RNU1C331MDN1)
http://www.digikey.com/product-detai...DN1-ND/4991607
...
I guess that the VRM output is w/o question where maximum ripple current matter most, so a 2200uF Nichicon LG (d8x12) with 6.7A ripple current (PLG0E222MDO1TD) is the way to go.
They used one polymer there already ( http://postimg.org/image/i2e14qssf/ ) and I did not remember that Samxon made any GE series ( http://www.manyue.com/?pg=products&b...ity=&LoadLife= ) but they also did not show any GC/GA caps there too, so I guess I rather replace these with known good caps with best specs.
But the question is - do the 330uF on the Vcore input matter more that the ripple current or not?
Also polymers produce slight noise in the signal, so that could be why Intel did have plenty of designs, where Vcore input caps are elytes and output are polymers:
Intel board D955XCS or overclockes board Intel D975XBX "Bad Axe" - or Intel D925XCV - there phases with elytes on the input:
So I'm torn between a elytes and polymers. Who will side with which and why?
3 phase Vcore VRM, ASRock 775i65G mobo, input 4x Chemi-con KZG 1000uF 16V d8, output 5x 1500uF Samxon GE 1500uF 6.3V + 1x 680uF 4V polymer cap.
Replacement for the input either:
elyte Nichicon HZ 1000uF 16V d8, ripple current 2.88A (UHZ1C102MPM6)
http://www.digikey.com/product-detai...PM6-ND/1628340
polymer Nichicon RNU 330uF 16V d8, ripple current 6.1A (RNU1C331MDN1)
http://www.digikey.com/product-detai...DN1-ND/4991607
...
I guess that the VRM output is w/o question where maximum ripple current matter most, so a 2200uF Nichicon LG (d8x12) with 6.7A ripple current (PLG0E222MDO1TD) is the way to go.
They used one polymer there already ( http://postimg.org/image/i2e14qssf/ ) and I did not remember that Samxon made any GE series ( http://www.manyue.com/?pg=products&b...ity=&LoadLife= ) but they also did not show any GC/GA caps there too, so I guess I rather replace these with known good caps with best specs.
But the question is - do the 330uF on the Vcore input matter more that the ripple current or not?
Also polymers produce slight noise in the signal, so that could be why Intel did have plenty of designs, where Vcore input caps are elytes and output are polymers:
Intel board D955XCS or overclockes board Intel D975XBX "Bad Axe" - or Intel D925XCV - there phases with elytes on the input:
So I'm torn between a elytes and polymers. Who will side with which and why?
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