Chapter 1 (1) (1)

Chapter 1: Installing Motherboards and Connectors

Objectives

  • Explain cable type and connectors

  • Install and configure motherboards

  • Explain legacy cable types

Cable Types and Connectors

Personal Computers

  • Components of a PC are divided into:

    • Peripheral devices (input/output/storage)

    • Internal components (motherboard, CPU, memory, etc.)

  • System Case/Chassis:

    • Houses internal components

    • Typically tower form factor (vertically oriented)

Accessing the PC Case

  • Maintenance requires opening the desktop computer's case:

    • Tower case side cover can be removed by sliding it

    • May be secured by screws or clips; follow system documentation

    • Front panel provides access to:

      • Removable media drives

      • Power switch

      • LEDs for operation indication

    • Rear panel has:

      • Power supply sockets

      • Cut-out for I/O ports and adapter card slots

      • Uncovered slots can disrupt airflow, causing overheating

Peripheral Devices

  • I/O ports are where devices connect via peripheral cables

    • Specific ports for certain devices (e.g., graphics port)

    • External ports located on rear/front of PC

    • Can be on motherboard or as an expansion card

Interfaces, Ports, and Connectors

  • Hardware Ports:

    • External connection points for bus interfaces

    • Buses allow data transfer between devices

    • Connectors must match the port's shape

  • Connectors now use edge contacts with asymmetric designs (keying) to prevent incorrect insertion

Binary Data Storage and Transfer Units

  • Computers process binary data:

    • Bit (b) = 1 or 0

    • Byte (B) = 8 bits

  • Transfer rates:

    • Kbps, Mbps, GBps, etc., measured in multiples of bits and bytes

Universal Serial Bus (USB) Cables

  • USB standard connects peripheral devices:

    • Functions divided into classes (e.g., human interface, mass storage)

    • Managed by a host controller supporting multiple connected devices

  • USB standards:

    • Various iterations improve data rates and connector types

USB Connector Types

  • Type A:

    • Connection to host and some peripherals; flat rectangle shape

  • Type B:

    • Connection to larger devices; square with beveled top

  • Type B Mini and Micro:

    • Smaller connectors; Micro is flatter and used for smartphones

  • Cable Lengths and Power Supply:

    • Length restrictions vary per USB type and can supply power for charging

HDMI and DisplayPort Video Cables

  • USB traditionally not for video due to high bandwidth demands

  • Video cable bandwidth is determined by:

    • Image resolution

    • Image redraw speed (Hz)

  • HDMI:

    • Widely used for video/audio; supports high resolutions and digital content protection

  • DisplayPort:

    • Developed as a royalty-free standard, supports similar features to HDMI

Thunderbolt and Lightning Cables

  • Thunderbolt:

    • Functions as both display and peripheral interface

    • Uses MiniDP interface; version 2 supports up to 20 Gbps

  • Lightning:

    • Proprietary to Apple devices; reversible connector for mobile devices

SATA Hard Drive Cables

  • Serial ATA (SATA):

    • Standard for connecting internal storage drives; uses separate power connectors

  • Speeds specified under various SATA revisions

Molex Power Connectors

  • Legacy components use a Molex connector for PSU connection

    • Color coding indicates voltage: red (5 V), yellow (12 V), black (ground)

Motherboard Functions

  • Software processed using binary code; CPU performs computing functions

  • System memory (RAM) provides temporary storage; mass storage persists data when off

  • Uses bus interfaces for data transmission; motherboard's system clock synchronizes operations

Electrical Safety and ESD

  • Proper procedures must be followed when working with PCs:

    • Disconnect power; discharge internal components

    • Handle components by edges; use anti-ESD wrist straps to prevent discharge

Motherboard Components

  • Motherboards have connectors for:

    • CPU, memory, fixed disk drives, adapter cards

  • CPU sockets and types affect compatibility and capability

  • System memory defined by RAM technologies (DIMMs)

Motherboard Storage Connectors

  • Fixed disks provide persistent storage; can connect via SATA ports or M.2 interfaces

  • External SATA (eSATA) for peripheral drives; must use specific cabling

Motherboard Adapter Connectors

  • Expansion slots allow for additional functionality via adapter cards

    • PCIe is mainstream; PCI still exists for legacy support

Motherboard Form Factors

  • Form factors influence shape/layout of cases; ATX, Micro ATX, Mini-ITX are common form factors

Motherboard Installation Steps

  1. Review motherboard documentation

  2. Prepare I/O cutout; fit blanking plate

  3. Insert standoffs; check alignment and support

  4. Optionally, add CPU and memory before installation

  5. Position motherboard on standoffs and secure with screws

  6. Complete the installation by adding power and devices

Motherboard Headers and Power Connectors

  • Include connectors for components like buttons, speakers, and fans

  • Main motherboard power connector; fan connectors may vary in pin configuration

Video and Network Interface Cards

  • Expansion cards enhance functionality, like adding video or audio

  • Typical components include GPUs and sound cards; various output connectors are available

Legacy Cable Types

  • DVI: Supports both analog and digital signals

  • VGA: Standard for analog video; phasing out due to newer digital connections

  • SCSI: Legacy parallel bus for connecting multiple devices

  • IDE: Older mass storage interface

  • Adapter Cables: Used to connect different port types

Conclusion

  • Discussion to explore components and configurations in a real PC environment.