Lesson 3 - Objectives 1.2 (RAM part only) and 1.3 (All) [Memorization and Understanding] Flashcards
What is RAM
- Stands for Random access memory
- Temporary working storage for data and programs that are being accessed by the CPU (ie main memory used by CPU)
- Its volatile memory, the contents are erased every time the computer is powered off
What impact does more RAM have on system performance
More RAM enhances system performance, as it increases the memory capacity of the computer to hold and process programs and files. With less RAM, the computer will have to swap data between RAM and the hard drive which is much slower. The maximum amount of RAM that can be installed is limited by the motherboard
Name and compare/contrast the two main categories of RAM
SRAM
- Static Random Access Memory
- Does not need to be refreshed
- Found in the cache memory of a CPU
- Soldered directly to a PCB(printed circuit board) ie motherboard, or directly integrated to CHIP
- NOT something to replace
DRAM
- Dynamic Random Access Memory
- Does need to be periodically refreshed (ie data is read on memory and immediately rewritten to area)
- SLOWER than SRAM
- Volatile sticks or DIMMS of DRAM are installed on the mobo
- Can exists on adapter cards
- Can be replaced, troubleshooted
What does SDRAM stand for and what is it
Synchronous DRAM
- Syncs to base clock of mobo (system bus speed), ie operates in sync with the memory bus, which is the data path between the CPU and the main memory
- Referred to as PC66, PC100, etc
- Form: 168 pin DIMM, 2 notches on bottom
- Its old and obsolete
What is DDR
- An improvement on SDRAM
- Twice the data rate of SDRAM, because if transfers data twice per clock cycle
- 184 pins
- 2.5 Volts
What is DDR2
- 240 Pins (faster signalling)
- 1.8 V
- increases speed
- improves performance by decreasing noise and crosstalk between signal wires
- 2X bus clock multiplier of DDR
What is DDR3
- 240 pins
- 1.2-1.5 V
- Consumes less power and generates less speed
- Increases memory by doubling clock rate of DDR2
- 4X bus clock multiplier of DDR
Name the DDR Standard, I/O clock speed, transfers per second and transfer rate for the following module: PC1600
Hint: The various DDR Standards are DDR-200, DDR-266, DDR-333, DDR400. (This hint is placed here because the exams are multiple choice, you can always work backwards from the options as well)
DDR Standard: DDR-200
I/O Clock Speed: 100 Mhz
Transfers per Second: 200 million
Transfer Rate: 1600 MB/s
Name the DDR Standard, I/O clock speed, transfers per second and transfer rate for the following module: PC2100
Hint: The various DDR Standards are DDR-200, DDR-266, DDR-333, DDR400. (This hint is placed here because the exams are multiple choice, you can always work backwards from the options as well)
DDR Standard: DDR-266
I/O Clock Speed: 133 Mhz
Transfers per Second: 266 million
Transfer Rate: 2133 MB/s
Name the DDR Standard, I/O clock speed, transfers per second and transfer rate for the following module: PC2700
Hint: The various DDR Standards are DDR-200, DDR-266, DDR-333, DDR400. (This hint is placed here because the exams are multiple choice, you can always work backwards from the options as well)
DDR Standard: DDR-333
I/O Clock Speed: 166 Mhz
Transfers per Second: 333 million
Transfer Rate: 2667 MB/s
Name the DDR Standard, I/O clock speed, transfers per second and transfer rate for the following module: PC3200
Hint: The various DDR Standards are DDR-200, DDR-266, DDR-333, DDR400. (This hint is placed here because the exams are multiple choice, you can always work backwards from the options as well)
DDR Standard: DDR-400
I/O Clock Speed: 200 Mhz
Transfers per Second: 400 million
Transfer Rate: 3200 MB/s
Name the DDR-2 Standard, I/O clock speed, transfers per second and transfer rate for the following module: PC2-3200
Hint: The various DDR2 Standards are DDR2-400, DDR2-533, DDR2-667, DDR2-800, and DDR2-1066. (This hint is placed here because the exams are multiple choice, you can always work backwards from the options as well)
DDR-2 Standard: DDR2-400
I/O Clock Speed: 200 Mhz
Transfers per Second: 400 million
Transfer Rate: 3200 MB/s
Name the DDR-2 Standard, I/O clock speed, transfers per second and transfer rate for the following module: PC2-4200
Hint: The various DDR2 Standards are DDR2-400, DDR2-533, DDR2-667, DDR2-800, and DDR2-1066. (This hint is placed here because the exams are multiple choice, you can always work backwards from the options as well)
DDR-2 Standard: DDR2-533
I/O Clock Speed: 266 Mhz
Transfers per Second: 533 million
Transfer Rate: 4266 MB/s
Name the DDR-2 Standard, I/O clock speed, transfers per second and transfer rate for the following module: PC2-5300
Hint: The various DDR2 Standards are DDR2-400, DDR2-533, DDR2-667, DDR2-800, and DDR2-1066. (This hint is placed here because the exams are multiple choice, you can always work backwards from the options as well)
DDR-2 Standard: DDR2-667
I/O Clock Speed: 333 Mhz
Transfers per Second: 667 million
Transfer Rate: 5333 MB/s
Name the DDR-2 Standard, I/O clock speed, transfers per second and transfer rate for the following module: PC2-6400
Hint: The various DDR2 Standards are DDR2-400, DDR2-533, DDR2-667, DDR2-800, and DDR2-1066. (This hint is placed here because the exams are multiple choice, you can always work backwards from the options as well)
DDR-2 Standard: DDR2-800 I/O Clock Speed: 400 Mhz Transfers per Second: 800 million Transfer Rate: 6400 MB/s Transfer Rate: 6400 MB/s
Name the DDR-2 Standard, I/O clock speed, transfers per second and transfer rate for the following module: PC2-8500
Hint: The various DDR2 Standards are DDR2-400, DDR2-533, DDR2-667, DDR2-800, and DDR2-1066. (This hint is placed here because the exams are multiple choice, you can always work backwards from the options as well)
DDR-2 Standard: DDR2-1066
I/O Clock Speed: 533 Mhz
Transfers per Second: 1.066 billion
Transfer Rate: 8533 MB/s
