Chapter 7 Memory upg Word Scramble

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Question	Answer
___________RAM is called that because it holds its data as long as the RAM has power.	Static
when the power is turned off, both SRAM and DRAM lose all their data, and are therefore called	volatile memory
________ RAM loses its data rapidly, and the memory controller must refresh it several thousand times a second	Dynamic
The major differences among DIMM, SO-DIMM, RIMM, and SIMM modules are	the width of the data path that each type of module accommodates and the way data moves from the system bus to the module
240-pin ________DIMM is currently the fastest memory. It can support triple or dual channels or be installed as a single DIMM. It has an offset notch farther from the center than a DDR2 DIMM.	DDR3
240-pin __________DIMM can support dual channels or be installed as a single DIMM. Has one notch near the center of the edge connector and uses less power than DDR	DDR2
184-pin _____________ DIMM can support dual channels or be installed as a single DIMM. Has one offset notch and runs twice as fast as regular SDRAM.	DDR
168-pin_________DIMM has two notches on the module. The positions of these notches depend on the memory features the DIMM uses. The first DIMM to run synchronized with the system clock.	SDRAM
______ has 184 pins and two notches near the center of the edge connector.	RIMM or Direct Rambus DRAM (sometimes called RDRAM or Direct RDRAM or simply Rambus
________must be installed two modules to a bank of memory.	72-pin SIMM
________must be installed four modules to a bank of memory.	30-pin SIMM
SDRAM, DDR, DDR2, DDR3,(DIMMs) use a	64-bit data path
A DIMM can have memory chips installed on one side of the module or both sides of the module called	single-sided or double-sided
A _______is the memory a processor addresses at one time and is 64 bits wide. Because DIMMs use a 64-bit data path, it takes only a single DIMM to provide one memory bank to the processor.	memory bank
DIMMs can always be installed as single DIMMs on a motherboard. However, some double-sided DIMMs provide more than one bank, which means the chips on the DIMM are grouped so that the memory controller	addresses one group and then addresses another
Double-sided DIMMs that provide two 64-bit banks are said to be	dual ranked
Singlesided DIMMs are always single ranked, meaning they provide only one	64-bit bank
remember that double sided refers to the physical location of the chips on the DIMM, and .	dual ranked refers to how the memory on the DIMM is addressed
SINGLE, DUAL, AND TRIPLE CHANNELS have to do with how many _________the memory controller can address at a time	DIMM slots
When setting up dual channeling, know that the pair of DIMMs in a channel must be equally matched	in size, speed, and features, and it is recommended they come from the same manufacturer.
DIMM speeds are measured either in	MHz (such as 800 MHz) or PC rating (such as PC6400).
A__________is a measure of the total bandwidth of data moving between the module and the CPU.	PC rating
The data path width for DIMMs is normally 64 bits, but with ECC, the data path is	72 bits. The extra 8 bits are used for error checking.
Older SIMMs used an error-checking technology called parity. Using parity checking,	9 bits (8 bits for data and 1 bit for parity)
A parity error always causes the system to halt. On the screen, you see the error message “Parity Error 1” or “Parity Error 2” or a similar error message about parity.	Parity Error 1 is a parity error on the motherboard; Parity Error 2 is a parity error on an expansion card
A_________DIMM hold data and amplify a signal just before the data is written to the module.	Buffers and registers
A ____________ uses an advanced buffering technique that makes it possible for servers to support a large number of DIMMs.	fully buffered DIMM (FB-DIMM)
Two other memory features are CAS Latency and RAS Latency. Both features refer to the number of clock cycles it takes to write or read a column or row of data off a memory module.	Lower values are better than higher ones. For example, CL8 is a little faster than CL9. CAS Latency is sometimes written as CL, and RAS Latency might be written as RL.
RIMMs that use a 32-bit data bus have a single notch and 232 pins. can support	dual channels and can be ECC or non-ECC. slots. If a slot does not hold a RIMM, it must hold a placeholder module called a C-RIMM (Continuity RIMM) to ensure continuity throughout all slots
Two major categories of SIMMs are	72-pin SIMMs and 30-pin SIMMs. SIMMs are rated by speed, measured in nanoseconds (ns).
The 72-pin SIMMs use a data path of 32 bits. Because processors expect to address 64 bits of memory at a time (one memory bank), 72-pin SIMMs are installed in	matching pairs.
30-pin SIMMs use a 16-bit address bus, and, therefore, must be installed in	four matching modules per bank to accommodate a 64-bit address bus to the processor
Technologies used by SIMMs that must match up with what that old motherboard supports:	FPM (fast page memory, EDO (extended data out AND Burst EDO (BEDO)
A DIMM technology that declares to system BIOS at startup the module’s size, speed, voltage, and data path width is called	Serial Presence Detect (SPD) .If the DIMM does not support SPD, the system might not boot or boot with errors. Today’s memory always supports SPD.
Issues with memory modules can cause a variety of problems, including boot failure; errors that cause the system to hang, freeze, or become unstable; and intermittent application errors. In Windows, memory errors can cause frequent	General Protection Fault (GPF) errors
When upgrading memory, use the type, size, and speed the motherboard supports and match new modules to those already installed. Features to match include buffered, registered, unbuffered, single-sided, double-sided, CL rating,	tin or gold connectors, support for dual or triple channeling, ECC, non-ECC, parity, nonparity, speed in ns, MHz, or PC rating, DDR, DDR2, DDR3, and size in MB or GB. Using memory made by the same manufacturer is recommended
When troubleshooting Windows memory errors, know the problems might be caused by a	virus, Windows corruption, application corruption, failing hardware device, memory modules not seated properly, or failing memory modules

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