Capacitor replacement question

[SparkyJJO]

I have an Epox socket A mobo here that has 4 venting caps rated at 2200uF 10v (circled in red in the pic). I have only one replacement cap like that, but several 3300uF 10v caps. Could there or would there be any ill effects in replacing the caps with higher capacity ones?

PIC

 

[Kwestyuns]

I'm by no means an expert in cap replacing on mobo's... but replacing it with a bigger one may be a bad idea. As it could release too much current and blow another cap or resistor. But like i said, im by no means an expert.

 

[Peter]

No, bad move. The charge/discharge timing is essential for the voltage regulation to give a smooth result. You need low voltage, low ESR, high temperature capacitors (pretty much specialized for that purpose). Any random capacitor that happens to have the same capacity will neither get the job done nor survive for very long.

 

[SparkyJJO]

I wasn't sure about the capacity - the type of capacitor is right because the 3300uF caps are off of a dead mobo. They are low ESR, high temp caps with the exact same voltage rating as the 2200uF caps that need replaced (10v).

Reason why I was asking is I've seen where people have changed caps to different capacity values to aid in stability for OC'ing so I wasn't sure if that would be all I'd be doing.

I guess I'll probably end up buying a couple new caps for it then.

 

[Peter]

Those people didn't really know what they were doing either. Balancing out all the large and small capacitors in a CPU voltage regulator is quite painstaking detail work ... and it's not like Mr. DIY could improve anything there without even having the measuring equipment.

Besides, the 2200µF 10V low ESR 105C is the most usual one in mainboard CPU regulators. Less than $2 apiece usually - much much cheaper than a fried CPU.

 

[GalvanizedYankee]

Sparky, PLEASE read the FAQs over at badcaps.net. Register, post pics in the Epox forum after you have searched & read some of it. Down load pics to thier server at 800 pixels, no more. You will be impressed with the help you get. It's not a fast board but one of my favorites.

You will need a 40~45W grounded iron with a 2mm wide chisel tip. You can ground a basic pencil iron with a metal clamp & alligator clip plus a bit of wire. (I just bought a Hakko station for $78 ) Read about irons in the FAQ section too.

Yes, generally capacitance can be increased one step on a mainboard or graphics card. The ESR & ESL are of great importance and must be the same or better.

Those look like TEAPO caps on your board and they can go bad with no visable sign. So if they are, change every one of them. TEAPO do well in PSUs but not so serving the VRMs on mainboards. GSC & OST are not VG on boards.

I'm still learning this stuff or I would offer more.


...Galvanized