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BrianG · 04.20.2007, 12:22 PM

I know that most computer motherboards use low-ESR caps due to some of the high currents and high frequency ripple, especially in the 3-phase CPU voltage down converter (converts the PS 12v into whatever core voltage the CPU needs at VERY high currents - at least 50A+).

So, a quick search found LXZ series caps. A couple 35v 270uF version should suffice, especially since they would be effectively in parallel with whatever is currently on there further increasing capacitance adn lowering total ESR. You can do a distributer search here. Digikey has them at a very decent price.

	(#21)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	04.20.2007, 12:22 PM I know that most computer motherboards use low-ESR caps due to some of the high currents and high frequency ripple, especially in the 3-phase CPU voltage down converter (converts the PS 12v into whatever core voltage the CPU needs at VERY high currents - at least 50A+). So, a quick search found LXZ series caps. A couple 35v 270uF version should suffice, especially since they would be effectively in parallel with whatever is currently on there further increasing capacitance adn lowering total ESR. You can do a distributer search here. Digikey has them at a very decent price.