3.2 Install appropriate RAM Flashcards
A Gamer primarily uses a desktop computer to handle the most resource-intensive games without experiencing lag. However, the hard drive went bad and needs replacing. What form factor should the gamer buy?
-3.5”
-5.0”
-NVME
-2.5”
NVME (Non Volatile Memory Express)
There are two form factors for HDDs. The mainstream type used in PCs is 3.5”, The 2.5” form factor is for laptops and as portable external drives. Devices with 2.5” form factors can also vary in height with 15mm, 9.5mm, and 5mm form factors
A Windows administrator sets up a SQL server that is very resource-intensive on memory and never deallocates room in memory. They want to set up an area in case all the system RAM is eaten up. What should they set up?
-Pagefile
-Swap Space
-Virtual Mermory
-Address Space
Page File
~In a Windows system, the extended memory space on a disk is a pagefile. The memory controller moves static memory pages to the swap space to free up physical RAM and retrieves pages from the swap space to physical RAM when process execution requires it.
~ If there is insufficient system RAM, the administrator can extend memory space by using disk storage known as swap space in a Linux system.
~The bus between the CPU, memory controller, and memory devices consists of a data pathway and an address pathway.
~The total amount of addressable memory (system RAM plus swap space) is virtual memory or virtual RAM.
A systems administrator sets up dual-channel memory in a system to increase performance. Which of the following does NOT require support?
-Ram devices
-Memory Controller
-Motherboard
-CPU
RAM devices
~With a dual-channel memory controller, there are effectively two 64-bit pathways through the bus to the CPU, meaning that the system can send 128 bits of data per transfer rather than 64 bits. This does not require support from RAM devices, but it does from all others mentioned.
~This feature requires support from the central processing unit (CPU). The system uses standard RAM modules. There are no “dual-channel” DDR memory modules.
~This feature also requires support from the memory controller and motherboard. When configuring a dual-channel system, users must consult the system documentation to identify the appropriate slots to use.
~Last, this feature also requires support from the motherboard.
A server administrator considers installing error correction code (ECC) RAM into the critical server to help with integrity but is concerned about multiple bit errors. What can happen when the administrator installs ECC RAM?
-System Halt
-An extra processor would be able to handle these
-Correction
-It cannot detect multiple bit errors
System Halt
~ECC can detect errors of 2, 3, or 4 bits but cannot correct them. Instead, it will generate an error message and halt the system.
~The system can detect and correct single-bit errors and allow the PC to continue functioning normally.
~ECC can detect multiple bit errors. However, there is a difference in how the system handles single-bit and multiple-bit errors.
~ECC RAM performs a hash calculation on the data value for each transfer and stores it as an 8-bit checksum. This checksum requires an extra processor chip on the module and a 72-bit data bus rather than the regular 64 bits.
A graphics artist wants to put together the best possible machine since the plan is to do graphics-intensive processing. Which of the following can the graphics artist use to distinguish between memory that appears to be the same?
-RAM type
-Transfer rate
-PC-# value
-Timing
Timing
~The technician can use timings to differentiate the performance of RAM modules that are an identical double data rate (DDR) type and speed. Lower timing values are an indicator of better performance.
~The technician is looking at RAM that appears to be the same so that the transfer rates will look the same.
~While RAM type would normally give a good indication (DDR2 vs. DDR3), the technician is looking at RAM that appears to be the same. This means that they would compare DDR2 against DDR2 or DDR3 against DDR3.
~An administrator would label DDR memory modules using the maximum theoretical bandwidth, such as PC1600, PC2100, etc. However, the technician is looking at RAM that appears to be the same.
A server technician sets up a critical server that requires memory with a high-reliability level. Which type of memory should the technician use?
-DIMM
-Pagefile
-SODIMM
-ECC
ECC
~Error-correcting code (ECC) RAM is for workstations and servers that require high reliability. ECC RAM performs a hash calculation on the data value for each transfer and stores it as an 8-bit checksum.
~A smaller form factor known as a small outline DIMM (SODIMM) packages laptop RAM. The memory typically fits into slots that pop up at a 45º angle to allow inserting or removing the chips.
~A form factor known as dual inline memory module (DIMM) packages double data rate (DDR) for desktop system memory.
~In a Windows system, the extended memory space on a disk is a pagefile.
A PC operator is building out a new system to replace an engineering technician’s older system. The new system is rated 2400 MT/s. The engineer wants to maximize the amount of RAM. Which amount should they put in?
-128GB
-8GB
-32GB
-16GB
32 GB
~DDR4 is rated at a data rate of 1600 to 3200 MT/s and can achieve a transfer rate of 12.8 to 25.6 GB/s. The max size supported is 32 GB.
~DDR3 is rated at a data rate of 800 to 2133 MT/s and can achieve a transfer rate of 6.4 to 17.066 GB/s. The max size supported is 16 GB.
~8 GB is not the maximum size for any DDR size. Both DDR4 and DDR5 support it.
~DDR5 is rated at a data rate of 4800 to 6400 MT/s and can achieve a transfer rate of 38.4 to 51.2 GB/s. The max size supported is 128 GB.
A data analyst is looking at a system with four 32-bit channels. The data analyst is most likely looking at what type of memory? (Select all that apply)
-DDR5
-DDR4
-Quadruple Channel
-Dual Channel
DDR5 and Dual Channel
*Double data rate 5 (DDR5) introduces a different type of data bus. Each memory module has two channels of 32 bits. When installed in a dual-channel memory controller configuration, this becomes four 32-bit channels.
*The DDR5 memory would have to be in a dual-channel memory for four 32-bit channels. There are effectively two pathways through the bus to the CPU with a dual-channel memory controller.
~DDR4 would not be correct. Also, one cannot install DDR5 modules in DDR4 slots since DDR5 introduces a different data bus.
~The quadruple channel is possible, although DDR5 memory in a dual-channel slot is the most likely scenario.
A help desk analyst is looking at a computer that has PC-1600 RAM in it. What is the maximum data transfer rate?
-2.4 GBps
-3.2 GBps
-1.6 GBps
-2.1 GBps
1.6 GBps
*The peak transfer rate is 1600 MBps (200 MT/s multiplied by 8 bytes (64 bits) per transfer), giving the “PC-1600” designation. 1600 MBps is equivalent to 1.6 GBps.
~2.4 GBps would be the peak transfer rate of PC-2400 RAM. A technician would label DDR memory modules using the maximum theoretical bandwidth, such as PC1600 or PC2100.
~3.2 GBps would be the peak transfer rate of PC-3200 RAM. Subsequent generations of DDR technology (DDR2, DDR3, DDR4, and DDR5) increase bandwidth by multiplying the bus speed instead of the speed at which the actual memory devices work.
~2.1 GBps would be the peak transfer rate of PC-2100 RAM.
A network administrator is setting up a server to manage their routers and switches throughout the environment and push standardized configurations. The administrator wants to use memory which performs a hash calculation on the data value. What should the network administrator use?
-UDIMM
-Swap Space
-Virtual Memory
-RDIMM
RDIMM
~Error correction code (ECC) RAM performs a hash calculation on the data value for each transfer and stores it as an 8-bit checksum. Most types of ECC supply as registered Dual Inline Memory Modules (RDIMMs). A registered DIMM uses an extra component to reduce electrical load on the memory controller.
~While the administrator could use unbuffered DIMM (UDIMM) since some types of ECC RAM get packaged in UDIMMs, although this is much rarer.
~If there is insufficient system RAM, the administrator can extend memory space by using disk storage known as swap space in a Linux system.
~The total amount of addressable memory (system RAM plus swap space) is virtual memory or virtual RAM.
A PC technician is researching why memory is not performing as expected. The technician tried installing quadruple channel memory, but it does not seem to be working as it should. What should the technician also check? (Select all that apply.)
-Check for mismatched modules
-Check for bad RAM
-Make sure the full complement is installed
-Check for flex mode
Check for mismatched Modules, Check for Flex mode, and Make sure the full complement is installed
~Some CPUs and supporting chipsets have triple- or quadruple-channel memory controllers. In these architectures, if the administrator does not install the full complement of modules, the system will revert to as many channels as are populated.
~A configuration with mismatched modules may cause the system to operate in single-channel mode.
~Flex mode means that if A1 contains a 2 GB module and B1 contains a 6 GB module, it will enable the dual-channel mode for 2 GB of memory, and the remaining 4 GB from the module in B1 will work in single-channel mode.
~Bad RAM will typically have much worse symptoms than not running at full capacity.
A computer operator is setting up memory in a computer and is curious how speed improvements occur to DDR RAM. So the operator begins researching. What will the computer operator find?
-New Materials
-Design improvements
-Increased speed at which device works
-Increased bus speed
INCREASED BUS SPEED
~Subsequent generations of double data rate (DDR) technology (DDR2, DDR3, DDR4, and DDR5) increase bandwidth by multiplying the bus speed. The transfer rate is the speed at which the memory controller can move data.
~Increasing bandwidth speed is preferred instead of the speed at which the actual memory devices work.
~New materials are not part of memory improvement. However, multiplying the bus speeds produces scalable speed improvements without making the memory modules too unreliable or hot.
~Design improvements also increase the maximum possible capacity of each memory module, but increased speed is primarily due to increased bus bandwidth.
