Chapter 4 Notes

Question 1

What five clock speeds were commonly used on the early DRAM system?

Answer 1

66, 75, 83, 100 and 133 MHz

They all had the prefix “PC”

So the clock speeds were PC66-PC133

Question 2

DDR SDRAM on laptops

Answer 2

Come in either 200-pin SO-DIMMs or 172-pin micro-DIMMs

Question 3

DDR3

Answer 3

30 percent lower power consumption than DRR2 RAM

Uses 240 pin DIMM

DDR3 SO-DIMM for portable computers have 204 pins