Flashcards in RAM Deck (50):
What is RAM?
RAM stands for Random Access Memory and is temporary storage where programs run on a system.
What are the two important features you need to know when looking at a Stick of RAM?
- Capacity (how much memory it holds), and
- Speed (how fast is the RAM).
What was the first type of RAM used in computers?
The first type of RAM used in computers was DRAM, which stands for Dynamic Random Access Memory. This type of RAM is still used today.
What is SDRAM?
SDRAM is a type of DRAM, and stands for Synchronous Dynamic Random Access Memory.
What are the features of SDRAM? (pin count, notch(es)
- 168 pin DIMM, and
- Two notches (The only current RAM with two).
What is DDR SDRAM?
DDR SDRAM is a type of SDRAM. DDR stands for Double Data Rate.
What are the features of DDR SDRAM, and how do you work out it's PC number?
- 184 pin DIMM, and
- doubled the ticks per system clock.
- Capable of using duel channel,
- Offset notch.
PC = motherboard speed doubled * 8
(if motherboard is 100MHz, DDR = 200, * 8 = PC 1600)
What are the features of DDR2, and how do you work out it's PC number?
- 240 pin DIMM.
- Capable of using dual channels.
- Notch near the center.
PC = motherboard speed doubled, doubled again * 8
(if motherboard is 100MHz, DDR = 200, DDR2 = 400 * 8 = PC2 3200)
What are the features of DDR3, and how do you work out it's PC number?
- 240 pin DIMM,
- Capable of using dual, triple, or quad channels.
- Far offset notch.
PC = motherboard speed quadrupled, doubled again * 8
(if motherboard is 100MHz, DDR = 400, DDR3 = 800 * 8 = PC3 6400)
What could happen if you mix RAM speeds or capacities?
Mixing RAM speeds or capacities could lead to system instability.
What are the features of RAMBUS RAM?
- Older RAM type,
- the first double data RAM (though short lived)
- 184 pin,
- Two notches.
- Had to be installed in two's.
- Required a C-RIMM (Continuity) to be installed in empty RAM slot.
What are the feature of RIMM.
- Two notches near the center.
RIMM was used to reference RAMBUS RAM connection but didn't actually stand for anything.
What are the features of ECC or Parity memory?
- ECC stands for Error Correcting Code.
- Will only work on some motherboards.
- Most likely to be found in Servers.
- Detects and can correct errors.
- Parity is older and can only detect errors.
What is SODIMM?
- SODIMM stands for Small Outline Dual Inline Memory Module, and is a RAM designed mostly for laptops.
What are the features of SODIMM?
- Similar speeds to desktop memory,
- Physically much smaller,
- Capacity tends to be lower due to smaller physical size.
What should you do if a computer doesn't boot after installing RAM?
Just take it out and try to install it again.
Ho do you check all RAM is installed correctly?
To check all RAM is installed correctly, go to the System page in the control panel and look for Installed Ram.
What are three reasons RAM might not show correctly in the System Properties?
- Channels are not set up correctly,
- Motherboard does not support the RAM speeds, and
- Motherboard does not support the RAM capacity.
How do you see more information about your RAM without opening your computer case?
A program like CPU-Z will show more information about your currently installed RAM and the individual slots without having to open the computer case.
List four errors indicate that the RAM could be faulty?
- Blue screen of death,
- Complete freezes, and
- The screen looks like it's melting away.
What three things can you do if you believe you have faulty RAM?
- Replace the RAM, or
- Boot into MEMTEST86 for OS's prior to Windows7 which tests memory.
- Windows7 and later has it's own memory testing program called Windows Memory Diagnostic in its administration tools and can work at restart.
(Diagnostic tools will tell you if there's an error but not which stick it's on.)
Why does DRAM refresh its memory?
DRAM loses data rapidly so the memory controller refreshes it thousands of times per second.
What is a PC rating?
A PC rating is the total bandwidth of data moving between the Module and the CPU.
How many bits does Parity Memory use?
Parity Memory uses 9 bits of data. (8 bits for data and 1 bit for parity)
What are two good websites you can choose to check if the RAM you want to get will work with the motherboard.
What are six precautions you should take when installing RAM?
- Use a grounding bracelet.
- Turn off the power and unplug it?
- Handle with care.
- Don't touch any connection areas.
- Don't stack cards or modules on top of each other.
- Ensure you are putting the cards in the right orientation.
Who are the to major manufacturers of processors?
The two major manufacturers of processors are Intel and AMD.
What is the name of the memory cache that is on the same die as the processor?
The memory cache that is on the same die as the processor is called the L1 Cache.
What is the name of the memory cache that is closest to the processor die but not on it?
The memory cache that is closest to the processor die but not on it is called the L2 Cache.
What is the name of Intel technology that allows a processor to access two threads at the same time?
The Intel technology that allows the processor to access two threads at the same time is called Hyper Threading.
What is the name of AMD technology that allows a processor to access two threads at the same time?
The AMD technology that allows the processor to access two threads at the same time is called Hyper Transport.
How many threads can a quad core processor handle at once?
Each core can handle two threads so the answer is eight.
Which Intel processor socket uses a screw to hold down the socket load plate?
LGA1150 and LGA1155.
What is the purpose of the Execute Disable Bit?
Execute Disable Bit is a built in Virus Protection from buffer overflow attack and stores data and instructions in an area not executable by other programs.
Which is faster, SRAM or DRAM? and why?
SRAM is faster because it doesn't need refreshing and can hold data as long as power is available.
What does CAS and RAS stand for?
- Column Access Strobe, and
- Row Access Strobe.
How many pins does a DDR SO-DIMM have?
A DDR SO-DIMM has 204 pins.
How many pins does a DDR SO-DIMM have?
A DDR SO-DIMM has 200 pins.
What xxx things do you need to look at when upgrading memory?
- Type, size, and speeds the motherboard supports,
- Match with features already installed.
- Memory from the same manufacturer is recommended.
What does CAS Latency and RAS Latency do?
CAS and RAS Latency measures the access time to the memory. The lower the value, the faster.
What are buffers and registers for?
Buffers and Registers are used to hold data and amplify a data signal. A DIMM is rated as Buffered, Registered, or Un-buffered.
What are DIMM and RIMM speeds measured in?
DIMM and RIMM speeds are measured in MHz (1333 MHz) or PC Rating (PC3-10600).
What are the current families of Intel Processors for desktops?
- Celeron, and
What are the current families of AMD processors for desktops?
- Athlon, and
What size of data path does a DIMM use?
DIMM's use a 64 bit data path.
What is SRAM?
SRAM is Static RAM used in the processor memory caches.
Is a Dual Ranked DIMM an improvement?
No, a Dual Ranked DIMM has to access multiple memory banks one at a time.
What does the placement of the two notches on a SDRAM mean?
- The left notches position indicates whether it is Registered, Buffered, or Un-buffered.
- The right notches position indicates the voltage it needs.
If the CAS Latency value is shown as a series of numbers, what do each of the first two numbers mean?
- The first number is CAS, and
- The second number is RAS.