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Computer Memory
The computer memory is a physical device used to store data or programs for use in a computer. Some types of computer memory include RAM (random access memory), ROM (read-only memory), and page cache.
4,434 Questions
Why silicon is used in memory chip?
silicon is the insulator. Just like rubber or platic coated electrical wires or cords are insulated.
Silicon is used for 3 very good reasons.
#1. It can be made so be so absolutely thin, it can be applied in layers in micro circuitry
#2. It can made as a liquid that solidifies, making it possible to create "printed circuit boards" Which are in essence layers of gold wire and silicon in a computer designed labyrinth that provide better speed, and uses less space.
#3. THERES LOTS OF IT AND IT'S CHEAP!
Silicon is a crystalline semiconductor, not an insulator. By adding impurities called dopants it can be made resistive, conductive, or into active devices like transistors. By oxidizing or nitriding it it can be made into an insulator.
In making modern chips, a large doped crystal of silicon about 4 feet long and a foot in diameter is grown, then sliced with diamond saws into 1 foot diameter 0.5 mm thick wafers. Using a process of photolithography areas are marked off for changing doping, insulating, or metallizing. As many as 3 dozen photolithographic steps may be needed to produce a circuit. The chips are then tested on the wafer then the wafer is "diced" with diamond saws. The good dice are then packaged and retested.
The main reason silicon is used is it is the most well behaved semiconductor and has insulating solid oxides. Germanium starts going into runaway conduction at too low a temperature and its oxides are conductive. Carbon has better high temperature characteristics than silicon, but its oxides are gasses. Binary semiconductors are often expensive or toxic to process (e.g. Gallium Arsenide).
Humans still design all integrated circuits, although they are now aided by computer software that can handle the boring place & route steps
The word was made up by Dr. Werner Buchholz at IBM IN 1956 to represent a grouping of bits. At the time, he was working with 6 bit bytes. Today, a byte is 8 bits.
we can say its a kind of ROM... since flash memory is a specialised EEPROM...
Which is much memory mb or gb?
* Gigabyte (GB) is the largest unit. * Megabyte (MB) is the next largest. * Kilobyte (KB) is the third largest in your list.
EDO RAM is a type of Dynamic RAM (DRAM) that improves the speed at which the processor can retrieve data from memory by allowing timing overlaps between memory accesses. EDO stands for extended data output.
What is the capacity of a USB?
- It depends on the capacity of your Flash Drive. Please choose a capacity: Your 2GB USB Flash Drive or solid state drive has 1905MB(1.86GB) available for user storage (the remaining 143MB is used by the USB Flash Drive to store its firmware essential for operation).
What technology in a DIMM informs the BIOS of the module's size speed voltage and data path width?
New technologies are able to interfere with the production of new cells and dictate how they are formed.
What two primary types of bus lines on the motherboard run between the CPU and the RAM sockets?
The two primary types of bus lines on the motherboard that run between the CPU and the RAM sockets are the address bus and the data bus. The address bus is responsible for carrying the addresses of the data being accessed, allowing the CPU to specify which memory location it wants to read from or write to. The data bus, on the other hand, transfers the actual data between the CPU and the RAM. Together, these buses facilitate communication and data exchange between these critical components.
What is the fastest RAM available for desktop computers?
It goes up to 2000mhz now, on the most expensive and high-end computers.
These are OverClocked
What type of slots will the RAM modules be installed?
RAM (Random Access Memory)
SIMM - Single memory module
DIMM - Dual memory module
SDRAM - Single Data "RAM"
DDR - Dual data rate
DDR2 - Dual data rate x 2
DDR3 - Dual data rate x 3
ECC - Error Correction
Mhz - Speed of data transmitted
Timings - Communication between the various chips
DDR2- 1024mb - 1024mb refers to the size of the RAM stick
How many ram chips of 256kb required to realize 1 GB?
A hypothetical 32x1 RAM chip provides storage for 32 bits or 4 bytes. 256k bytes require 256 * 1000 * 8 = 2048000 bits (or 256 * 1024 * 8 = 2097152 bits, if the k is interpreted to mean kibibyte rather than kilobyte, using the IEC nomenclature).
Because 2048000 / 32 = 64000, you'd need 64000 chips.
ROM=Read Only Memory
True ROM is screened at the factory as is a Microprocessor. It cannot be changed without destroying the contents. There are many advantages to this as the contents can be counted on to remain the same throughout the life of the device it is installed in. This is also the major pitfall as it is not upgrade-able either.
ROM is a perfect medium to store boot-time instructions for a computer or portable device which are expected to be unchanging. Reading the boot track data for a device that includes magnetic media is one use for ROM. It can hold simple hardware diagnostics. It can also include audio-visual information such as standard sounds and icons or simple startup sounds and textual cues for system errors.
Almost all electronic media that is distributed on some hardware uses ROM. Video games, DVDs, music. Almost anything that you would READ but not CHANGE.
RAM is volatile, because RAM requires a continuous flow of power to be able to retain the memory that is being stored within the RAM. Meaning, that whenever power is turned off and there is no longer a flow of electricity all data that is stored within the RAM is erased.
( Read below for more information regarding what type of memory is non-volatile)
Now the type of storage device that is non-volatile is your hard-drive. It is non-volatile, because even when there is not a constant flow of electricity to the computer all of the memory that was stored in the hard drive stays on the hard drive till you want it removed.
( A tip below to help you remember what is volatile and what is non-volatile)
a good tip that I have figured out that will help you remember the difference between volatile and non-volatile is to look at the ( v ) in the word volatile. You can think of the v as representing volts. so if you see something that says volatile just think of the v, and you will remember that since it is volatile it requires power to hold the memory. When non-volatile is said look for the ( v ) again and think of the word non-volatile as it was saying no volts, because volts are not needed for something that is non-volatile for it to retain its memory. I hope these tips help you out and you have a good day.
What kind of computer memory is permanent?
Thats too easy...
Wired RAM
Is used to save kernal and processes so you dont have to buy a 70 dollar windows os or 120 dollar mac os x or 0 dollar (woohoo!) Ubuntu disc every time you load up your computer.
You could also say Inactive RAM to AN extent. AT least some of it will be used to save application data and processes at all times, so i guess it counts too...
-adrat203, founder (and CEO and CFO and COO) of SDA Enterprises and its subsidiary, SDA Designers, popular on Google Sketchup 8
Name two characteristics of a system using rambus licensed memory?
RAMBUS memory is on a stick of RAM called a RIMM. It is the fastest RAM available but you have to have the hardware to use it. It comes in 184 pin for desktops and 160 pin for laptops. RIMMs are keyed differently than DIMMS so you can't install it in any computer. You are required to install RIMMs in pairs to use the full technology, it has a dual-channel technology. Each RIMM is 64 bits wide, but the RAMBUS alternated between two sticks to increase the speed of data retreival. RDRAM motherboards require that all RIMM slots be populated. Unused pairs of slots need a passive device called a continuity RIMM (CRIMM) installed in each slot to enable the RDRAM system to terminate properly. In other words, you have to buy a blank CRIMM to fill in the slots or it will not work properly on the motherboard.
How do you delete website memory on computer?
It's simple just destroy all the technology which is related with websites memory. You are the perfect person who asked this question. Hay you are the only living person who are selected for this job. Do it as soon as possible. %%-
Is 5 megabytes a lot of usage?
Usage of what? If it's hard drive space it's practically nothing. If it's data usage of a dial-up Internet connection, that's at least several minutes time worth.
ROM is classified as Secondary Storage because, it retains information even when not being read/refreshed or powered in some way. As opposed to Primary Storage which constantly requires power and must be refreshed to retain any information it contains.
ROM stands for Read Only Memory, it is commonly used with CD-ROM, which stands for Compact Disk Read Only Memory.
There is also an acronym of WORM, which is Write Once Read Many.
What is One billion bytes of data is called?
That is approximately a Gigabyte. The prefix Giga normally means a billion, but in computer science, and specifically for data storage, it is often taken to be 10243. The difference is about 7%.
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