Chapter 6 Memory and Storage Flashcards
RAM
Random Access Memory
RAM is used
for programs and data, and by the operating system for disk caching
Disk caching
using RAM to hold recently accessed disk sectors
A portion of the RAM is used to speed up access to data on the disk.
It can be general-purpose RAM in the computer that is reserved for use by the disk drive
Soft disk cache works by
storing the most recently accessed data in the RAM cache
RAM
improves the transfers between the CPU and both RAM and disk drives
WINDOWS
can also use the hard disk as a slow substitute for RAM
swapfile or paging file
to hold part of the contents of memory if the installed RAM is not large enough
DIMM
240 pin
184 pin
168 pin
SDRAM, DDR SDRAM, RDRAM
168-pin
DRAM
Dynamic RAM chips, FPM fast page mode, and EDO extended data-out measured in nanoseconds and smaller is faster. Usually speeds of 100 ns. FPM Usually 30 pin or 72 pin SIMM modules 70-100 ns. EDO usually 72- pin to 168 pin DIMM modules 60 ns are now obsolete.
SRAM
Static Random Access Memory, Faster than DRAM and sold in smaller qualities as well. You will not be replacing SRAM which acts as cache memory for CPUs.
SDRAM
Synchronous DRAM was the first type of memory to run in sync with the processor bus. 168-pin DIMM modules use SDRAM memory. Rated by bus speed of PC66=66 MHz and PC100= 100MHz, and PC133= 133 MHz.
DIMM
Dual in-line memory modules, comprises of dynamic RAM integrated circuits. These modules are mounted on a printed circuit board and designed for use in client devices. Primary memory module used as Intel P5-based Pentium processors.
DDR SDRAM
Double data rate SDRAM performs two transfers per clock cycle. 184-pin DIMM memory modules. PC1600 200MHz/1600MBps, PC2100 266MHz/2100MBps, PC2700 333MHz/2700MBps, and PC3200 400MHz/3200MBps.
DDR2 SDRAM
double-double data rate SDRAM, runs its external data bus at twice the speed of DDR SDRAM, enabling faster performance.
Rambus
Rambus Direct RAM (RDRAM) memory was used in Pentium 4 chipsets. i820 i840 E7205