RAM Flashcards
SDRAM
Synchronous Dynamic Random Access Memory
- tied to a system clock like a CPU or MCC, this allows the MCC to know when data is ready to be used by the SDRAM
DIMM
Dual Inline Memory Module
- Combined with the SDRAM to utilize different pin sizes for connections
Early SDRAM DIMM Pin sizes (Desktop)
Desktops 168 pin
Early SDRAM DIMM Pin Sizes (Laptop)
Micro DIMM Packages 68-pin, 144-pin, 172-pin
Small-Outline DIMM Packages 72-pin, 144-pin, 200-pin
Clock Speeds in Early SDRAM
66Mhz, 75Mhz, 83Mhz and 133Mhz
RDRAM
Rambus Dynamic Random Access Memory
-developed by Rambus to keep up with new quad core processors 400Mhz front bus speeds
-can handle speeds up to 800Mhz
DDR SDRAM
Double Data Rate Synchronous Dynamic Random Access Memory
-doubles the throughput of SDRAM by making two processes for every clock cycle
DDR SDRAM Pins (Desktop)
184 pins
DDR SDRAM (Laptop)
SO DIMM 200 pin
Micro-DIMM 172 pins
If a computer clock speed is 100 MHz, what is the DDR Speed rating? What is the PC speed rating?
DDR-200
PC-1600
If a computer clock speed is 200 MHz, what is the DDR Speed rating? What is the PC speed rating?
DDR-400
PC-3200
If a computer clock speed is 300 MHz, what is the DDR Speed rating? What is the PC speed rating?
DDR-600
PC-4800
T or F: Dual-Channel DDR requires two identical sticks of DDR and they must snap into paired slots?
True, many motherboards offer four slots and by populating the same-colored slots with identical RAM, you can run in dual-channel mode.
DDR 2
Has improvements in its electrical characteristics, enabling it to run even faster than the DDR and use less power. This happens by clock doubling the input/output circuits on the chips.
How many pins does a DDR 2 use?
240 pin DIMM
