1.04 Motherboards: This video explained what ATX, BTX, and NLX form factors are and determined the differences between the three. It also explained what communication buses are. It explained what 8 and 16-bit ISA’s are. It explained what PCI, PCIx, PCIe, and AGP slots are.
1. ATX Form Factor: Replaced the older AT form factor. It is smaller than the AT and has better organization which makes it easier to work on. It also has more support for today’s variety of I/O devices. ATX uses P1 Power and supports both the 20 and 24 pin connectors. Mice and keyboards use either the PS/2 or USB connectors. The memory slots are DIMM. The expansion slots are either PCI or AGP. It also contains 2 IDE connectors and 1 or 2 SATA connectors. It contains a Soft power button which allows the OS to go through its shutdown process. The power switch on the back on the other hand immediately kills all power to the PC. It uses wake on LAN which allows keyboard or network activity to will repower the system if it is on standby.
2. BTX Form Factor: It is compatible with all the features of the ATX. It has improvement in airflow. It has either a 20 or 24 pin P1 power connection. It has better air flow for cooling; it contains an intake vent at the front, exhaust vent in the back, and CPU heat sink fins and memory modules installed parallel to the air flow.
3. NLX Form Factor: It is used on low end pc’s and supports riser cards. Riser cards fit into expansion slots and provide connectors for additional expansion cards. They are also known as daughter boards.
4. Communication Buses: These buses appear as copper tracing on the bottom of the motherboard, and connect various components and allow delivery of power and data. System Buses: they are the largest and the fastest bus. They connect the motherboard to the CPU.
5. 8-bit ISA: Used in early computers.
6. 16-bit ISA: This was the next generation. This was later followed by the MCA, EISA, and the Versa Local Bus. They didn’t last...