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IT chpt 5
Chapter 5 of Jean Andrews CompTIA A+ Guide to Managing and Maintaining Your PC
Terms in this set (38)
Colum Access Strobe (CAS) Latency
A method of measuring access timing to memory, which is the number of clock cycles requires to write or read a column of data off a memory module.
Centrino Processor Technology
A technology used by Intel whereby the processor, chipset, and wireless network adapter are all interconnected as a unit, which improves laptop performance.
Continuity RIMM (C-RIMM)
A placeholder module that fills a memory slot on the motherboard when the slot does not hold a RIMM in order to maintain continuity.
Double Data Rade (DDR) SDRAM
A type of memory technology used on DIMMs that run at twice the speed of the system clock.
Also called DDR SDRAM, SDRAM II, and DDR
A miniature circuit board installed on a motherboard to hold memory.
They can hold up to 16GB of RAM on a single module.
Direct Rambus DRAM
A memory technology by Rambus and Intel that uses a narrow network-type system bus. Memory is stored on a RIMM module.
Also called RDRAM, Rambus, or Direct RDRAM
A DIMM feature whereby memory chips are installed on both sides of a DIMM.
The most common type of system memory, it requires refreshing every few milliseconds.
A motherboard feature that improves memory performance by providing two 64-bit channels between memory and the chipset. DDR, DDR2, and DDR3 DIMMs can use dual channels.
Two processor sockets on a server motherboard.
Double-sided DIMMs that provide two 64-bit banks. The memory controller accesses first one bank and then the other. They do not perform as well as single-ranked DIMMs.
Error-Correcting Code (ECC)
A chipset feature on a motherboard that checks the integrity of data stored on DIMMs or RIMMs and can correct single-bit errors in a byte.
More advanced ECC schemes can detect, but not correct, double-bit errors in a byte.
Graphics Processing Unit (GPU)
A processor that manipulates graphic data to form the images on a monitor screen. It can be embedded on a video card or on the motherboard or integrated within the processor.
The Intel technology that allows each logical processor within the processor package to handle an individual thread in parallel with other threads being handled by other processors within the package.
The AMD technology that allows each logical processor within the processor package to handle an individual thread in parallel with other threads being handled by other processors within the package.
L1 Cache (Level 1)
Memory on the processor die used as a cache to improve processor performance.
L2 Cache (Level 2)
Memory in the processor package but not on the processor die. The memory is used as cache or buffer to improve processor performance.
L3 Cache (Level 3)
Cache memory further from the processor core than level 2 cache but still in the processor package.
The memory a processor addresses at one time. Today's desktop and notebook processors use a memory bank that is 64 bits wide.
A processor technology whereby the processor housing contains two or more processor cores that operate at the same frequency but independently of each other.
The factor by which the bus speed or frequency is multiplied to get the CPU clock speed.
Two processing units installed within a single processor and first used by the Pentium processor
Multiplies the frequency
A system that contains more than one processor. The motherboard has more than one processor socket and the processor must be rated to work in this multiprocessor environment.
An error-checking scheme in which a ninth, or "parity" bit is added. The value of the parity bit is set to either 0 or 1 to provide an even number of ones for even parity and an odd number of ones for odd parity.
An error that occurs when the number of ones in the byte is not in agreement with the expected number.
The frequency at which the CPU operates. Usually expressed in GHz.
Technology used by a motherboard and DIMMs that allows the memory controller to access four DIMMs at the same time.
A method of measuring access timing to memory, which is the number of clock cycles required to write or read a row of data off a memory module.
Rambus In-Line Memory Module (RIMM)
A type of memory module developed by Rambus Inc.
Single Inline Memory Module (SIMM)
An outdated miniature circuit board used to hold RAM. They held 8, 16, 32, or 64 MB on a single module.
The memory controller on a motherboard that can access only one DIMM at a time.
A DIMM that has memory chips installed on one side of the module.
Small Outline DIMM (SO-DIMM)
A type of memory module used in notebook computers that uses DIMM technology.
Static RAM (SRAM)
RAM chips that retain information "without the need for refreshing", as long as the computers power is on. They are more expensive than traditional DRAM.
Each process that the CPU is aware of; A single task is part of a longer task or request from a program.
When the memory controller accesses three DIMMs at the same time.
An older processor that first used the number 86 in the model number and processes 32 bits at a time.
x86-64 Bit Processor
Hybrid processor that can process 32 bit or 64 bit.
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