Ch4 RAM Flashcards
Where can you view how much RAM you have in your computer?
Task Manager, System Properties, and BIOS
Four DDR1 Types
- DDR-200
- DDR-266
- DDR-333
- DDR-400
DDR-266 Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
133 MHz, 266 Mil, 2133 MB/s, PC2100
DDR3-1066 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
533 MHz, 1066 Mil, 8533 MB/s, PC3-8500
Number of Pins in DDR2 and DDR3 Memory
240 Pins, but DDR2/DDR3 are not compatible due to placement of orientation notch.
What memory architecture has 200 pins?
SODIMMs which are used in laptops.
SDRAM with clock rates and pin count.
- Synchronous Dynamic Random Access Memory is a type of memory that is synchronized to the base clock of the motherboard.
- 66 MHz (PC66), 100Mhz (PC100), 133 MHz (PC133)
- 168 pins.
What is the transfer rate of DDR2-800?
6400 MB/s
DDR2-800 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
400Mhz, 800 Mil, 6400 MB/s, PC2-6400
DDR3-2133 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
1066 MHz, 2133 Mil, 17066 MB/s, PC3-17000
Which chip designates where data will be stored in RAM?
Northbridge
Six DDR3 Types
- DDR3-800
- DDR3-1066
- DDR3-1333
- DDR3-1600
- DDR3-1866
- DDR3-2133
DDR3-1600 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
800 MHz, 1600 Mil, 12800 MB/s, PC3-12800
Single Sided vs Double Sided Memory
Single Sided has a single bank of chips that can be accessed all at once even if the chips are physically on both sides of the stick.
Double Sided has 2 banks of chips that can be accessed only one bank at a time.
DDR-400 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
200 MHz, 400 Mil, 3200 MB/s, PC3200
DDR2-533 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
266 MHz, 533 Mil, 4266 MB/s, PC2-4200
You just investigated a computer that is suffering from intermittent shutdowns. You note that the RAM modules are overheating.
What is the best solution?
Install heat sinks on the RAM modules.
Which technology divides the RAM slots into colors?
Dual/Triple Channel
Calculating Basic DDR Bandwidth
Clock Speed(MHz) x bytes (8) x 2= Data Transfer Rate (Bandwidth in MB/s)
What memory type would you find internal to the CPU?
SRAM might be used as CPU Cache.
DDR3-800 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
400 MHz, 800 Mil, 6400 MB/s, PC3-6400
DIfference between Single, Dual, and Triple Channel
- Single Channel uses 64 bit bus / 1 Memory Stick Per Channel
- Double Channel uses 128 bit bus / 2 Memory Sticks Per Channel
- Triple Channel uses 192 bit bus / 3 Memory Sticks Per Channel
Five Steps of A+ RAM Installation
- Select the correct memory module.
- Employ ESD prevention methods.
- Ready the motherboard.
- Install the RAM.
- Test the installation.
DDR2-400 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
200 MHz, 400 Mil, 3200 MB/s, PC2-3200
How should you hold RAM when installing it?
By the edges.
DDR defined with bus width and pin amount.
Double Data Rate aka DDR SDRAM is a memory format also linked to the memory clock like SDRAM that allows for double the normal SDRAM transfer amount due to transferring data on rising and falling edges of each clock cycle.
Has a 64 bit bus width (like SDRAM) which allows for transfer of 8 bytes of data per cycle.
DDR DIMM has 184 pins with a single notch in stick.
DDR3-1333 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
667 MHz, 1333 Mil, 10667 MB/s, PC3-10600
DDR2-1066 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
533Mhz, 1066 Mil, 8533 MB/s, PC2-8500
How many pins are on a DDR3 memory module?
240 Pins.
DDR-200 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
100 MHz, 200 Mil, 1600 MB/s, PC1600
You just upgraded a PCs motherboard and CPU. However, when you turn the computer on, it will not POST. What should you do first?
Check if the RAM is properly seated.
Five DDR2 Types
- DDR2-400
- DDR2-533
- DDR2-667
- DDR2-800
- DDR2-1066
Memory Latency (3)
Slight delay bin nanoseconds while the memory module responds to the memory controller.
Given a rating of CAS (Column Address Strobe) or CL.
Higher the number in CS / CL rating the longer the delay.
DDR3-1866 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
933 MHz, 1866 Mil, 14933 MB/s, PC3-14900
Parity
Extra bit used in RAM for error correction which results in 9 bits used for every byte (8bits) of actual data.
DDR2-667 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
333 MHz, 667 Mil, 5333 MB/s, PC2-5300
What is the delay that it takes for a memory module to start sending data to the memory controller?
latency
Second Method for Calculating DDR Bandwidth
MegaTransfers (Transfers per Second) x bytes (8) = Bandwidth in MB/s
You suspect a problem with a memory module; what should you do first?
Clean the RAM Slot (Check for proper installation first, but A+ book lists this)
Difference between SRAM and DRAM (3)
Static Random Access Memory (SRAM) does not need its data to be periodically refreshed, while Dynamic Random Access Memory does require its data to be periodically refreshed.
SRAM is faster than DRAM, but usually soldered to motherboard.
DRAM is memory standard for main memory.
What is the transfer rate of DDR-1600?
12800 MB/s
DDR-333 Memory Clock Speed, Transfer per Sec, Transfer Rate, and Module Name
166 MHz, 333 Mil , 2667 MB/s, PC2700
ECC (2)
Error Correction Code in RAM can detect and correct errors.
It is the slowest and most expensive memory type and can be identified by an E on the end of the module name.
You just installed new, compatible RAM into a motherboard, but when you boot the computer it does not recognize the memory.
What should you do?
Flash the BIOS if you are positive of the memory compatibility and installation.
If a BSOD occurs, what should you do?
Wait for it to happen again to see if it is a reoccuring problem that may be RAM caused.
