Chapter 4 starting at page 144

Question 1

DDR3 has 3 advantages over DDR2. What are they?

Answer 1

higher speeds, more efficient architecture, and approximately 30% lower power consumption

Question 2

DDR3 uses a _____ pin DIMM. DDR3 SODIMMs for portable computers has ______ pins.

Answer 2

240, 204

Question 3

How does the DDR3 increase the bandwidth over older RAM?

Answer 3

DDR3 doubles the buffer from 4 bits to 8 bits

Question 4

What is XMP?

Answer 4

XMP stands for Extreme Memory Profile, which enalbes power users to overclock their RAM. It also uses higher-density memory chips, up to 16GB DDR3 modules.

Question 5

the AMD version of XMP is called ______________

Answer 5

AMP, for AMD Memory Profile

Question 6

GDDRx is used exclusively in _________ ______.

Answer 6

video cards.

Question 7

DDR3 also supports triple-channel and quad channel architecture. How?

Answer 7

Works like dual channel, but with three or four sticks of RAM instead of two.

Question 8

DDR3 I/O speeds are ____________ the clock speeds, where DDR2 is _________ the clock speed. The increased ________size enables DDR3 to grab twice as much data every clock cycle as DDR2.

Answer 8

quadruple, double, buffer

Question 9

Fill in the missing parts of the table:
Core Ram Clock Speed - 100 MHz
DDR I/O Speed - \_\_\_\_\_\_
DDR3 Speed Rating - \_\_\_\_\_\_\_
PC Speed Rating - PC3-6400

Core Ram Clock Speed - 166 MHz
DDR I/O Speed - _________
DDR3 Speed Rating - _______
PC3 Speed Rating - ________

Answer 9

100 MHz
400 MHz
DDR3-800
PC3-6400

166 MHZ
667 MHz
DDR3-1333
PC3-10667

Question 10

What does DDR3L and DDR3U stand for?

Answer 10

DDR3L is a low-voltage version of DDR3, which can offer substantial cost savings when used in massive RAM applilcations and uses 1.35 V.
DDR3U is the ultra low voltage version of DDR3, which runs at 1.25 V.

Question 11

Lower voltage means less _______generated, which means less _______________ needed.

Answer 11

heat, cooling