if you're a seasoned PC Builder or tinkerer you can probably rattle off a
few different connectors and headers on your motherboard in your freaking sleep
especially if you dream about RGB heat sinks like I do but what about all those
other little tiny components for instance the capacitors and resistors
that fill up all the extra space what exactly do they do well a big part of
the reason you have so many electronic components on your motherboard's PCB is
that your computer parts like CPU graphics card memory Etc typically can't
use electricity directly from your power supply for example most of those 650
Watts or whatever your power supply promises are delivered on the 12vt rail
but imagine what would happen if you put 12 volts through a modern CPU which only
needs like a tenth of that to run you'd
fry it faster than an egg on a hot radi uh sidewalk so because everything in
your PC needs a very specific amount of
power your board has lots of capacitors on it those are the cylindrical looking
things that poke out of your motherboard like little tiny water towers in a
little miniature City H they even serve
a somewhat similar function to the aformentioned water towers they store
energy then release it in a controlled
fashion you see the power that comes into them doesn't flow completely smooth
ly and has small variances in voltage that could make it useless or even
damage your components so these small capacitors clean up the power and
deliver the silky smooth constant voltage that your internal Electronics
need and if you open up a decent power supply make sure it's unplugged first
you'll probably find some much larger capacitors that serve a similar function
keeping a constant DC voltage for your computer and filtering out no noisy AC
interference also called Ripple but although capacitors help to clean up the
power resistors do much of the heavy lifting when it comes to controlling
what voltages your components actually get as you can probably guess a resistor
resists the flow of current ensuring that your components won't get so much
power that they'll be damaged although many hobbyist who have worked with
simple circuits might be familiar with resistors that look like this with
colored bands that indicate strength measured in ohms most resistors on
Modern motherboards are more understated
in appearance looking like little black and silver rectangles okay then but what
about all those blocky things near my CPU they don't look like capacitors or
resistors and okay well you'd be right these are called chokes which and okay
don't get too excited they're a type of inductor similar to how a capacitor will
smooth out voltage and an inductor will smooth out current important considering
how much power a typical desktop CPU can draw you can learn more about CPU power
delivery right up here and speaking of power delivery we would be remiss if we
didn't mention our old friend the transistor you might know that there are
millions or even billions of tiny transistors in your CPU and chipset that
act as logic switches that allow your computer to function but there are
larger ones on on your motherboard close to the chokes that I mentioned earlier
called mosfets since transistors can both change voltages and have logic
gates your mosfets and CPU actually talk
with each other to figure out the correct amount of voltage to deliver to
the CPU at any given time then the
mosfets take the electricity from your power supply adjust the voltage and pass
it through the chokes and onto your processor so obviously the engineering
that goes into making all of these parts work together properly is quite complex
but hopefully now you have a better idea of why all those random bits on your
motherboard are even there and if not
you could always just buy one of those new fangled boards with the nice looking
shroud and RGB lights and forget
everything that I just said it's not like you'll hurt John's feelings or
anything you will a lot actually but
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