Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
28 Cards in this Set
- Front
- Back
|
For CPUs without integrated memory controller, which part of the chipset manages communication between the CPU and memory? |
Northbridge |
|
|
In order to retain its configuration data, CMOS RAM requires constant supply of electricity which is provided by the: |
CMOS battery |
|
|
Which types of memory are designed to store permanent data that cannot be changed? |
ROM PROM |
|
|
Volatile storage media |
Memory that requires a continuous flow of electricity to preserve its contents All the data stored in RAM lasts only while the power is on |
|
|
SRAM |
"Static RAM" – Faster than DRAM – More expensive than DRAM – Used for CPU cache memory chips |
|
|
SDRAM |
"Synchronous Dynamic RAM" A broad category of DRAM modules that rely on the signal sent by the system clock in order to coordinate their functioning with other internal PC components |
|
|
How is the speed of the system bus is measured? |
In clock cycles A single clock cycle is an equivalent of a period of time between two adjacent signals sent by the system clock The speed of the system bus in modern PCs is measured in MHz |
|
|
A group of bits processed as a unit is called: |
A word |
|
|
How much data can SDR SDRAM read/write? How many contact pins are used in SDR SDRAM modules? |
"Single Data Rate SDRAM" Reads/writes 1 word of data per clock cycle 168 pins |
|
|
How much data can DDR SDRAM read/write? How many contact pins are used in DDR SDRAM modules? |
"Double Data Rate SDRAM" Reads/writes 2 words of data per clock cycle 184 pins, with one notch on the module contact surface |
|
|
What is the industry name used for DDR-333 modules? |
PC-2700 |
|
|
What is the peak transfer rate of a DDR-266 module? |
2133 MB/s |
|
|
How much data can DDR2 SDRAM read/write? How many contact pins are used in DDR2 SDRAM modules? |
"Double Data Rate 2 SDRAM" Reads/writes 4 words of data per clock cycle 240 pins, with one notch on the module contact surface |
|
|
What is the industry name used for DDR2-1066 modules? |
PC2-8500 |
|
|
What is the total bandwidth of a DDR2-533 module? |
4266 MB/s |
|
|
How much data can DDR3 SDRAM read/write? How many contact pins are used in DDR3 SDRAM modules? |
"Double Data Rate 3 SDRAM" Reads/writes 8 words of data per clock cycle 240 pins, with one notch on the module contact surface |
|
|
What is the industry name used for DDR3-1333 modules? |
PC3-10600 |
|
|
What is the maximum amount of data that can be transferred each second by a DDR3-1600 module? |
12800 MB/s |
|
|
What are DIMMs? Do they have separate or unified electrical contacts on each side of the module? How many bits is the data path? |
"Dual In-line Memory Modules" – Printed Circuit Board (PCB) type used as a placeholder for memory chips – Separate electrical contacts on each side of the module – 64-bit data path |
|
|
What memory module form factor is used in laptop computers? How many pins does it use? |
SO-DIMM 200 pins for DDR 200 or 144 pins for DDR2 204 pins for DDR3 |
|
|
How is RAM speed measured? |
In bytes per second — MHz speed x 8 bytes e.g. DDR-400 has a speed of PC-3200 |
|
|
Channels |
RAM can be used in single, dual or triple channel configurations Dual and triple channel configurations use 2 or 3 identical sticks of ram in unison to increase throughput |
|
|
Buffered |
On compatible motherboards, a small register is installed to act as a buffer b/w the DIMM and the memory controller Compensates for electrical problems in systems with a lot of memory modules, e.g. servers |
|
|
ECC |
"Error Correction Code" – Detects when a single bit is wrong and corrects it – Slower – Used for servers and for special uses such as finance |
|
|
Parity |
An old type of error detection where the RAM stored an extra bit of data that the memory controller used to verify if the data was correct Not foolproof, and can only detect, not correct, errors |
|
|
How would you check RAM compatibility? |
1. Check how many slots are in the motherboard 2. Check the motherboard's manual to see: – what kind of RAM is compatible – what the limits are |
|
|
What is MicroDIMM? How many pins does it use? |
A memory module form factor commonly used in sub-notebook devices 172 pins for DDR SDRAM 214 pins for DDR2 SDRAM |
|
|
UDIMM & RDIMM |
UDIMM: "Unregistered DIMM" – DIMM without a buffer – Used for most PCs RDIMM: "Registered DIMM – DIMM with a buffer – Used for most servers |
