term1 Definition1term2 Definition2term3 Definition3
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RAM
Random Acces Memory - the most common./
Memory is (not=) the hard drive(HDD) storage./
Data and programs can only be used when moved in the RAM.
ROM
ReadOnlyMemory-can't be changed or erased./
PROM - Programmable ROM - write once./
EPROM - Erasable PROM - write,erase,re-write./
EEPROM - Electrically Erasable PROM - flash memory./
SRAM
Static RAM - very fast memory./ very expensive memory./ big memory./ Used often in processor caches L1,L2,L3./ No refreshing but still volatile./
DRAM
Dynamic Random Acces Memory - the RAM we know. /Dynamic - needs constant refreshing. /
without refreshing, the data in memory disappears./
SDRAM - Synchronous DRAM - synchronous with the system clock(133 MHz clock = PC133)./
RDRAM -Rambus(Inc.) and Intel partnership./
(DDR)SDRAM
Double Data Rate SDRAM - twice the data rate as SDRAM./ (16)
DDRAM2 SDRAM - Enhanced electrical interface, buffers, twice as fast, off-chip drivers./ (32)
DDRAM3 SDRAM - Twice the data rate of DDR2, larger chip capacities./ (64)
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