What connects to a southbridge?



Which of these components would normally NOT connect directly to a southbridge?

A) USB ports

B) RAM

C) Floppy drive

D) Mouse


The answer: B) RAM

In any personal computer, the connection between RAM and the CPU runs at very high speeds through the northbridge. In many memory-intensive applications, the speed of the communication between RAM and the CPU is often the determining factor. The faster the memory bus and front-side bus, the faster the computer.

The incorrect answers:


A) USB ports
C) Floppy drive
D) Mouse

The southbridge is a controller chip for the “slower” motherboard components, which means that USB ports, floppy drives, and mice would be right at home. Because of the need for high-speed communication, RAM is never directly connected to the southbridge.

Want to know more? Watch “Motherboard Overview.”


Every CompTIA A+ professional needs to have a complete understanding of motherboards and the components that reside on today’s PC motherboard technology. In this video, we’ll provide you with the information you need to instantly identify the most important motherboard features, and you’ll learn how chipset architectures relate to real-world motherboard configurations.