Gigabyte makes boards specifically for gaming, which usually comes with a lot of heat.
It take a lot of electricity to heat anything. It take a lot of electricity to heat anything.
plugged into motherboard
A lot of heat
Yes!
* They take up a lot of space * They create a lot of heat
Not a lot because they can get dehydrated and die.
The brain of a computer is the CPU (central processing unit)
The heat sink absorbs the heat from the processor and then the fan disperses the heat.
YOu can damage the motherboard
You don't have to do this, but it is generally easier to manipulate the motherboard and components before you put it inside the case, which due to limited space can make it rather awkward. On the other side, if a motherboard is installed prior to components, it will have a lot more support from its holding brackets etc. This can be very important for installations that may put pressure/bend the motherboard body. A good example of this, as pointed out by ID1198720506 are components which use latch/snap mechanisms to lock on to the motherboard.
You should not bother to check any power supply in the motherboard. You need to take the motherboard to service centre if faulty.
Processor, RAM, daughter cards, CMOS, Heat sink