Motherboard Power and Connectors

Question

Answer

What voltages does the main motherboard power connector provide?

3.3V

What connector do older motherboards use for main power?

20-pin

What connector do newer motherboards use for main power?

24-pin

Can a 24-pin power supply connector work with a 20-pin motherboard?

Yes

What allows removing extra pins for compatibility?

Modular power supplies

What ensures proper alignment of the main power connector?

It is keyed

What secures the main power connector in place?

A locking mechanism requiring a latch release for removal

Why might components like graphics cards need extra power connectors?

They require more power than the motherboard alone provides

What are the two common PCIe power connector variants?

6-pin (75W) and 8-pin (150W)

What voltage do PCIe power connectors supply?

12V DC

What flexibility do some 8-pin PCIe connectors offer?

They can split into a 6-pin configuration

What shape is a SATA data connector?

L-shaped

What is eSATA used for?

External drive connections

Where might eSATA connectors be located?

Integrated into the motherboard or an expansion card

What is an M.2 connector used for?

Small

How is an M.2 drive installed?

Inserted into the slot and secured with a screw

What are pin headers used for?

Connecting case components like power buttons

What are examples of common pin headers?

USB headers (USB 2.0

What do front panel connectors typically include?

Power button

How are motherboard connectors typically identified?

They are usually labeled on the motherboard