RAM Flashcards
Most RAM is volatile, which means?
It loses any stored contents if it stops receiving power.
RAM that does not need to be periodically refreshed is called?
Static random access memory (SRAM)
RAM that does need to be periodically refreshed is called?
Dynamic random access memory (DRAM)
What is SDRAM or synchronous DRAM?
DRAM that is synchronized to the base clock of the motherboard.
SDRAM clock rates are:
66 MHz
100 MHz
133 MHz
And referred to as:
PC66
PC100
PC133
How many pins are on SDRAM?
168 pins
What is the most commonly used RAM?
Double Data Rate (DDR RAM)
The equation for the data transfer rates for DDR RAM is:
Clock speed x bytes x 2 = Data Transfer Rate
Example: 100 MHz x 8 x 2 = 1,600 MB/s
Or MT/s x 8 = Data transfer rate
How many pins are on DDR RAM?
184 pins
How many pins are on DDR2 RAM?
240 pins
How many pins are on DDR3 RAM?
240 pins
What is memory latency?
Memory latency or Column Address Strobe (CAS) latency happens when a memory controller tries to access data from a memory module. It is given a rating of CAS or more commonly CL. The higher the CL number, the longer the delay.
What is RAM parity?
When memory stores an extra bit (known as a parity bit) used for error detection.
What does ECC RAM do?
It can detect and correct errors.
What technology divides the RAM slots into colors?
A. ECC
B. Parity
C. Double-sided
D. Dual channel
D. Dual channel
Which of these is the delay it takes for a memory module to start sending data to the memory controller?
A. DDR
B. Propagation
C. Latency
D. FSB
C. Latency
What is the main memory that the CPU uses to store or retrieve data?
RAM
What is the transfer rate of DDR2–800?
A. 6,400 MB/s
B. 8,533 MB/s
C. 5,333 MB/s
D. 800 MHz
A. 6,400 MB/s
Which of these would you find internal to the CPU?
A. DRAM
B. DIMM
C. SDRAM
D. SRAM
D. SRAM
Example is CPU cache as L1 cache.
What is the transfer rate of DDR3–1600?
A. 6,400 MB/s
B. 12,800 MB/s
C. 14,933 MB/s
D. 17,066 MB/s
B. 12,800 MB/s
Which chip designates where data will be stored in RAM?
A. Southbridge
B. Northbridge
C. CPU
D. DRAM
B. Northbridge
How many pins are on a DDR3 memory module?
A. 168
B. 184
C. 240
D. 200
C. 240
Some common symptoms of a RAM issue are:
Computer will not boot/intermittently shuts down.
The BIOS indicates a memory error.
Stop error, a.k.a. BSOD or blue screen of death.
Page faults (hard faults), out of memory or low on virtual memory errors.
General protection fault (GPF)
Where can you view how much RAM you have in the computer? (Select all that apply)
A. Task Manager
B. My Computer
C. System Properties
D. BIOS
A, C, and D.
Task Manager, System a Properties and the BIOS.
