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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
How much RAM can you add to your computer?
Easily....However you must be certain that you are installing the correct type of RAM for your system. There is DDR - DDR2 - low density - high density. Check to be sure what kind you have before you buy more
What is the smallest addressable unit of storage in a computer?
1 bit = a 1 or 0 (b)
4 bits = 1 nybble (?)
8 bits = 1 byte (B)
1024 bytes = 1 Kilobyte (KB)
1024 Kilobytes = 1 Megabyte (MB)
1024 Megabytes = 1 Gigabyte (GB)
1024 Gigabytes = 1 Terabyte (TB)
Modern mobile phone (also known as smartphones/PDA) utilize RAM as any other computer. The only difference is that it's embedded, you can't upgrade it as you would do with a PC.
What software manages memory access for programs in RAM?
The operating system does. At least if it supports virtual memory. If your OS does not, (e.g. if you use DOS or another ancient OS) a program can do anything with the RAM. Note that (at least) in the Intel x86 architecture, some (relatively small) areas of memory are not RAM at all. They are usually reserved by the hardware for other stuff like memory-mapped devices or even the BIOS ROM.
What is the main function of a RAM?
RAM stands for Random Access Memory. It is temporary storage for data. For instance, when you open Microsoft Word (or any program), it goes into RAM because your CPU can get it a lot faster from RAM, than if it tried to get it off of your hard drive. However, RAM is dynamic which means if the power is cut off then any data that is in RAM is lost. Lets say you are typing a letter, each time you hit the keyboard that data is put into RAM until it can be transferred to your hard drive. If the power goes off then whatever is in RAM while you were typing will be lost.
Can Ram be used to backup files?
Generally, no. RAM is volatile memory, which means that all data there will be lost when the computer is powered off. Normally your computer only uses it for data (and programs) which is currently in use. But there ARE devices that use RAM for data storage (e.g. PDAs and some fancy solid-state drives). These devices usually provide a battery to power the RAM when the device is turned off.
Note that DVD-RAM is a rewritable non-volatile media. It retains its data when powered off but you can change the data later.
How do you transfer photos from a memory card to your computer?
If you are using a laptop computer with an inbuilt card reader, just insert your SD card & you will be able to see the card memory in your 'My Computer'.
1. You can copy the pictures by selecting & Ctrl+C & then Right-click --> Send To--> <SD Card>
2. Or after copying the picture, double-click on the SD Card icon in your 'My Computer' screen & paste the pictures by Ctrl+V.
If you have a desktop computer, you will need a 'Card Reader', to read your SD Card's memory.
Can PC5300 RAM be used in a computer that has PC3200 RAM?
It is possible to use pc3200 ddr ram in a PC designed for pc2700 ddr ram, but the pc3200 ram will only run at pc2700. If you want to fully exploit the pc3200 ram then you will have to buy a motherboard that will be able to support a speed equal to pc3200 or greater.
The memory address space is 64 MB, which means 226. However, each word is 4 bytes, which means that you have 224 words. This means you need log2 224 or 24 bits, to address each word.
Where can one purchase the PC2 8500 DDR2 RAM online?
Computer and electronics retailers sell DDR2 memory chips for laptops; such retailers include Office Depot and Best Buy. An owner can also contact the company that manufactures the specific laptop for computer accessories. Someone in need of this product can find these memory chips available for sale in online marketplaces as well.
What part of The motherboard is essential when selecting memory?
Read motherboard manual and look memory slots.............
Basically, these are the memory units used to represent the memory of the computing devices.
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Bit
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Byte (Contains 8 bits)
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Kilo-byte (Contains 1024 bytes)
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Mega-Byte (Contains 1024 kilo-bytes)
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Giga-Byte (Contains 1024 Mega-bytes)
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Tera-Byte (Contains 1024 Giga-bytes)
and so on....
FDD means floppy disk drive,....., it also means Feature Driven Developement in terms of UML.
How cache increases computer speed?
: Cache (pronounced cash) memory is extremely fast memory that is built into a computer's central processing unit (CPU), or located next to it on a separate chip. : The disk cache is used to hold the most recently-accessed information from the hard disk. If you are using your PC for work that is hard-disk-intensive, you may benefit from increasing the size of your disk cache.The CPU uses cache memory to store instructions that are repeatedly required to run programs, improving overall system speed. The advantage ofcache memory is that the CPU does not have to use the motherboard's system bus for data transfer. Whenever data must be passed through the system bus, the data transfer speed slows to the motherboard's capability. The CPU can process data much faster by avoiding the bottleneck created by the system bus.
When the processor needs to read from or write to a location in main memory, it first checks whether a copy of that data is in the cache. If so, the processor immediately reads from or writes to the cache, which is much faster than reading from or writing to main memory.
The diagram on the right shows two memories. Each location in each memory has a datum (a cache line), which in different designs ranges in size from 8[1] to 512[2] bytes. The size of the cache line is usually larger than the size of the usual access requested by a CPU instruction, which ranges from 1 to 16 bytes. Each location in each memory also has an index, which is a unique number used to refer to that location. The index for a location in main memory is called an address. Each location in the cache has a tag that contains the index of the datum in main memory that has been cached. In a CPU's data cache these entries are calledcache lines or cache blocks.
How do you test the RAM compatibility of a system?
Put it in your computer. Your computer (From a Windows 7, I assume you have a Windows 7 or higher) will detect how much RAM is actually being used if you right click Computer -> Properties. It should say "14GB" if you have 14GB. However, if you have an issue with RAM, then it will say "14GB (7GB usable)" only 7 could be any number lower than 13GB (since sometimes it will say ~13.5GB)
It depends tho, Ram only process data, Yes it can store it as long as the power is on but if you turn the computer off, any data in the is gone, it can't hold any data, plus you can't even access it if its there I think.
When you save a document does the computer transfer the document from a storage medium to memory?
No. It transfers it from memory to a storage device, so it does the opposite.
How often does a memory controller automatically refresh memory in dynamic RAM?
Thousands time per second.........
What is processor cache memory?
Processor cache is intermediate memory between the processor itself and main memory (RAM).
Because processors can read data so much faster than main memory, the speed of a processor would essentially be limited to the speed of RAM if we couldn't find a way to increase the efficiency of accessing data in main memory. Caches, which have a much lower access time than RAM, help to mitigate this problem.
Caches work on the principle of spacial locality. That is to say, they use the idea that if you access a location in main memory, then it is highly likely that the next memory location you want to access is very close to where you are. When you access main memory, the cache will actually pull in a "chunk" of data (often called a "cache line") in the hope that the next time you try to access data it will already be in the cache.
Typically there are two levels of cache (though with the increasing popularity of multi-core processors, three levels of cache are becoming more and more necessary).
The first level of cache (L1 cache) is what is directly accessed by the processor and is therefore the fastest (and most expensive) cache. L1 cache is usually split into two parts: data cache and instruction cache. The instruction cache holds the instructions of running programs that the processor needs to execute. The data cache holds the data being used by current instructions.
The second level of cache (L2 cache) is where the L1 cache pulls in information from. L2 cache is slower than L1 cache, but is more affordable and can be much larger than L1. With the exception of L3 caches mentioned above, this is the cache which pulls information in from main memory.
What is bigger a 50mb or a 2gb?
Hello,
2GB is 2 "gigabytes". 256MB is 256 "megabytes".
1 "gigabyte" is another way to refer to 1000 "megabytes".
So, 2GB is much more than 256MB!
Hope that helps you out!
Ken Hogan
