> what else capacitors could i weld on the motherboard else ???
> the capacitors are well solded right 2cm near the CPU socket,
> what could change in soldered capacitors Voltage and UF do ???
> supposedly i run 3.4Ghz CPU s478 ....
Capacitors have printed, and unprinted values. They must both
be considered, before making a substitution.
The best discussion on this, will be in the regulator chip datasheet.
It will have a discussion on the selection of "input capacitors" and
"output capacitors" for VCore.
The capacitor has working voltage (6.3V), nominal capacitance (3300uF),
but also has ESR and ESL (equivalent series resistance, equivalent series
Electrolytic capacitor construction is such, that the volumetric
extent of the capacitor predicts the properties. Now, the funny
part of that, is when you look at the motherboard and the spacing,
you might see a smaller capacitor package size. When you go to shop
for an exact replacement, all the replacement caps are one size
larger and won't fit the gap. That makes repair difficult. It also
implies the properties of the capacitor, might not be up to
industry standards and norms. (The motherboard manufacturer always
seems to find the small ones, and then as a repair person, you
can't find any in that small size, only ones which are physically
larger. Since the capacitors are "shoulder to shoulder", they won't
Where you live in the world, may also affect your repair choices. For
example, if I look at the most easily available suppliers here, they
don't carry any "premium" products I might be interested in buying.
I can find capacitors unsuited for a VCore regulator, easily enough
(Radio Shack). But if I look for capacitors especially designed for
switching regulators, I might have to shop via Ebay/Hong Kong, to
Start with the regulator datasheet, and work from there.
And replace an electrolytic, with another electrolytic. Don't try
substituting polymer caps, or OSCONs on your own. If you read the
datasheet, and see how complicated the equations are, you'll realize
why making substitutes is not a trivial task.
In terms of values, the value doesn't have to be exactly 3300. You
could use a 2200 for example. VCore allows some variation in value.
Using a different value, changes the output ripple, or the transient
response time. The capacitance is not the most important number.
If you raise the working voltage value (replace 6.3 with 16V for example),
all that will happen is the capacitor will become much larger
and won't fit on the motherboard.
If you use a capacitor manufacturer web site, you can get some
general comments on application of their components. Some of
these sites, have nice summary information to make it easier to
select the correct "family" for the job. http://chemi-con.com/u7002/applications.php
If you're curious, you can also look around this site. http://www.badcaps.net/