29 terms

CompTIA A+

Chapter 1 Flash Cards
ATX System Boards
- Processor and Memory slots at right angles to power supply fans
- creates better air flow
- Install full length expansion cards
Micro ATX (UATX) System Boards
- Works in standard ATX cases, and with its own standard cases
- Same airflow with smaller hardware
- must give up quantity of hardware space
- designed with lower wattage power supplies
BTX System Boards
- lines up all the heat-producing hardware between air intake vents and the power supplies exhaust fan
- quieter
- perform interface and [peripheral functions for the processor
- provides interfaces for memory, expansion cards, and on-board peripherals
North-bridge Chipset
- Management of high-speed peripheral communications
- responsible primarily for integrated video using AGP and PCIe
- true performance of a PC relies of the north-bridge Chipset
- manages the communications between the southbridge Chipset
- If computer has on-board video circuitry it will be found within the north-bridge Chipset
South-Bridge Chipset
- provides support to myriad on-board peripherals
- PS/2, Parallel, IDE, LAN, Audio, Infrared, Serial, Firewire
- manages communications with other expansion buses such as PCI, USB, Legacy
Front Side Bus (FSB)
- set of communication pathways between the CPU and main memory
Backside Bus
- Communication pathways between the CPU and Level 2 cache memory (If present)
Expansion Slots
- Plastic slots from 3" to 11" and 1/2" wide
- Video, Network, Sound, Disk Interfaces cards
Types of Expansion Slots
ISA Expansion Slots
- computer made before 1997
- usually black and have two parts, one shorter and one longer
PCI Expansion Slots
- Short (Around 3") and usually white
- Can be found in any computer that has a Pentium-class processor or higher
AGP Expansion Slots
- Accelerated Graphics Port (AGP) are popular for Video Card
- direct connection between the video circuitry and PC's memory
- usually brown, and located right next to the PCI slots, and are shorter than PCI slots
PCIe Expansion Slots
- designed to replace AGP and PCI
- Faster than AGP with maintaining flexibility of PCI
- also have regular PCI slots for backward compatibility
PCIe Speed Levels
- 1X, 2X, 4X, 8X, 12X, 16X, and 32X
- Correspond roughly to AGP speeds
- Slot corresponds to its speed
- Slots gets longer when speed is greater
- 1X (less than 1")
- Lanes - Multiplied units of communication between two PCIe components and are directly tied to the physical wiring on the bus
- Can use shorter card speed in a longer speed slot
AMR Expansion Slots
- known as Audio Modem Riser
- 46 Pin slots was common on Intel motherboard
CNR Expansion Slots
- Communications and Networking Riser (CNR)
- Replacement for AMR slots
- 60 Pin Slots implement a motherboard Chipset with a certain integrated features
- Added to enhance on-board capabilities
CNR advantages over AMR
- Networking support, Plug and Play, Support for hardware acceleration, no need to lose competing PCI slot unless the CNR slot is in use
- Contains the BIOS software that tells the processor how to interact with the hardware in the PC
- Keeps setting of the computer when its turned off and unplugged
- Has a CMOS battery to keep the settings even when unplugged with no power
Jumper/DIP Switches
- Changes voltage on motherboards for the processor
- Changes other hardware settings directly from the physical motherboard
- Software that is embedded into the read-only memory (ROM) chip and can be ran without extra instructions from the OS
- Controlling how much CPU is spend on an application
- Set of instructions that the processor execute while carrying out its duties
- Offers increased performance designed to work with over-clocked speed
Voltage Regulator Module (VRM)
- send a voltage level to the portion of the processor which sends back its voltage CPU needs
- Steadies and manages the CPU voltage
Types of RAM
Dynamic Random Access Memory (DRAM)
- Cheapest to produce and purchase
- Four Types of DRAM
- Ties SDRAM to the speed of the FSB and the processor