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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
CPU works directly with the RAM and any memory i/o on the RAM by the CPU is a solid state operation where no mechanical devices are involved. Therefore data operations with RAM are very fast.
Virtual memory on the other hand has a portion on the RAM and a portion on the disc that cannot be accomodated in the RAM. This is because virtual memory is much larger than the RAM or even the address space available to the CPU. The virtual memory manager manages loading the data page from the disc and back.
When a program needs a portion of data that is in the virtual memory, the virtual memory manager checks if the data is in a page that is already loaded on the RAM. If it is, then it simply hegabs the virtual memory address with the physical address on the RAM so that the program can access the memory. If the data is on a virtual address that is not on the RAM, Lol, the page that contains the portion of the data needed is loaded from the disc onto the RAM and placed in an empty slot that is available so that the virtual address could be converted to a physical address that is on the RAM. However the process of loading the page from the virtual memory involves seeking th page on the disc and loading it onto the ram. It may also involve making space available on the RAM if there is no empty slot found and for that a page needs to be unloaded from the RAM and putting it onto the disc which adds to another disc i/o operation.
Thus explains why having the data accessed and operated on the RAM is much faster than Disc i/o. Now-a-days some computers do come with Hard disks that are completely electronic. Virtual memory operations will be much faster with such Hard disk drives. However the process of virtual to physical translation and paging shall still be required.
"Idyllic" basically means something like "extremely happy; peaceful".
It's also possible, if you heard the term rather than saw it, that the speaker was actually saying eidetic memory, which is more commonly referred to as a "photographic memory".
Which is faster RAM or ROM memory?
Large RAM chips can be read faster than most ROMs since 2007. Sometimes, to allow uniform access, ROM contents need to be coppied to RAM or shadowed before its first use, and be read from RAM.
How long can a 1GB memory card record?
There really is no reliable answer to this question. There a far too many variables to take into account in order to provide an answer. The issues that need to be taken into account are: # Whether you are storing video, audio or both # The format you are using # The compression ratio # Frame rate or sample rate # Video resolution or audio bit rate # Various other variables, such as the implementation of the compression format Given these variables, it is enormously difficult to provide even averages.
We can, however use a commonly known baseline; that being Youtube's file formats.
Audio; MPEG layer 3 (MP3):
Standard Quality
* Mono, 22.050 kHz
* ~67 kbps/sec High Quality
* Stereo, 44.100 kHz * 128 kbps/sec Very High Quality * Stereo, 44.100 kHz
* 128 kbps/sec Video; Sorenson Spark (H.263):
Standard Quality * 320 x 240, 15-30 fps
* ~250 kbps/sec High Quality * 320 x 240, 29.97 fps
* 677.7 kbps/sec Very High Quality * 640 x 480, 29.97 fps
* 2019.2 kbps/sec Totals; .flv (flash video):
Standard Quality * ~320 kbits/sec High Quality * 804.7 kbits/sec Very High Quality * 2147.2 kbits/sec
So, based on the totals for the flash video, we can estimate for each level of quality the number of hours per gigabyte.
Hours per Gigabyte:
Standard Quality * 1 gigabyte / 320 kilobits per second = ~26 214.4 seconds
* 26, 214.4 seconds / 60 seconds per minute = ~436.9minutes
* 436.9 minutes / 60 minutes per hour = ~7.2 hours High Quality * 1 gigabyte / 804.7 kbits per second = ~10 424.5seconds
* 10, 424.5 seconds / 60 seconds per minute = ~173.7minutes
* 173.7 minutes / 60 minutes per hour = ~2.8 hours Very High Quality * 1 gigabyte / 2147.2 kbits per second = ~3 906.7 seconds
* 3906.7 seconds / 60 seconds per minute = ~65.1minutes
* 65.1 minutes / 60 minutes per hour = ~1.08 hours
How can you increase your ram without adding a new ram?
no you can not add anymore RAM without replacing the slots that are full inside with higher memory sticks of RAM
There are lots, too many to name. Some of the popular ones are:
EDO (Obsolete)SDRAM (Mostly Obsolete)
RAMBUS (Obsolete) - Data transfers fast, but takes a long time to find. Only used on P4 systems.
DDR/DDR2/DDR3 - Current technology. Basically a pumped up version of SDRAM
GDDR2 - An early version of DDR2, only used on graphics cards.
AnswerDynamic Random Access Memory(DRAM):-- cotents are constantly refreshed 100times per second.
- Access time 60-70 nanoseconds.
- a nano second is equal to 1billionth of a second.
synchorus dynamic random access memory(SDRAM):-
- quicker than DRAM
- access time than 60seconds.
Direct rambous Dynamic Random Access Memory(DRDRAM):-
- new type of ram architecture.
- access time is 20times faster than DRAM.
- more expensive.
Static random access memory(SRAM):-
- doen't need refreshing.
- retains contents as long as power applied to the chip.
- access time is arround 10seconds.
- used for cache memory.
- also data and time settingsas powered by small battery.
Cache memory:-
- small amount of memory typically 256 or 512 kilobytes.
- temporary storage for often used instructions
- CPU checks to see whether the next instructions it requires in cache.
- if not the CPU has to fetch next information from the main memory.
Video random access memory:-
- holds the data that can b displayed on the computer.
- Has two data paths allowing to READ & WRITE to occur at same time
- a graphics card may hav its own VRM chip on board.
virtual memory:-
- uses backing storage
eg:-harddisk
- virtual memory is much slower than the ram.
What characteristic of RAM memory makes it not suitable for permanent storage?
It could be used for storage. But that wouldn't make sense, since that space is dedicated to your operating systems memory...
VMWare uses regular storage space as memory for all its Virtual Machines, 1 TB could equal 8 GB of Ram, and 992 GB of Storage, for example.
Hope this helps.
Command for system information utility?
To use System Information, in the Run dialog box, type Msinfo32 and press Enter.
How is memory organized in a computer?
Memory in a normal desktop computer today is organized in two different places:
- In the physical memory chips, attached to your motherboard.
- In a "paging file" on the hard drive of your pc.
Memory is further organized into just regular memory, or what is called virtual memory. Virtual memory can exist on the memory chips, and on your hard drive in the paging file.
On the next level, memory is organized on a per program basis. A program loads up, takes what it needs, then continues on working. As the program needs to store more information in the memory, it make take up more and more. That is why if you load a 20 page word document, it would take up more space than a two page word document.
And memory optimizers simply do not work. All they do is move memory from the memory chips to your hard drive, making it seem like they are actually working. They actually make programs slower, since they have to reload that memory from the hard drive, into the memory.
What are the two kinds of computer memory?
Computer memory can store information as long as there is power to the computer, that means when you turn the computer off you loose the information in the memory. Computer storage, which includes, floppy disks, the hard disk, cd's, rewritable cd's all store information that remains safe when no power is applied, similar to RECORDS and VIDEO tapes. It can be changed and edited by the system as needed but remains safe. So when you go back to the computer later it's still there available.
What if a motherboard support dual channeling but you have four DIMMs available that differ in size?
If you install DIMMS in all four slots that don't match, the memory will still work, just not at top performance.
well since a geobyte is really just a 1 with 29! zeros after it there is really no need to have more and plus the ram sytem would have to be the size of a car to fit that much so even trying to get 1 after would have to be much greater in size
There is
Saganbyte (SB) -> as Geobyte 1024
Jotabyte (JB) -> as Saganbyte 1024
Gatobyte (GAB) -> as Jotabyte 1024
Difference between hard disk and flash memory?
A Floppy Disc (by definition) holds a maximum of 1.44 MegaBytes (1,440,000 Bytes) of data whereas a flash drive starts at 500 MegaBytes 500,000,000 and can hold as much as 8,000 MegaBytes 8,000,000,000 (8GB) of data. ... SIZE .. DOES .. MATTER. :-)
How many no of address lines required in 1MB memory 111622 or 24?
How many no of address lines required in 1MB memory 11,16,22 or 24
u haven't specified correct options!
20 address lines will be required
because
1 MB is 1024 KB that is 1024*1024 Byte which is equivalent to (2^10)^2 bytes
if ur memory is Byte addressable then address lines required will be 20.
What does plastic memory mean?
If you heat a type of plastic and bend it and let it cool down bent it will stay bent, but if you hold the bent plastic on or over the heat it will bend back so it's straight again
How much bit makes up a mega byte?
1,048,576 bytes in a megabyte.
8 bits in each byte
Thus 8,388,608 bits in a megabyte (MB)
How memory management is done in a mobile phone multimedia systems and a calculator?
haha..we have the same problem..OS???LOL
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What is the term that defines excessive swapping of files between RAM and virtual memory?
multitasking this answer is wrong.
right answer is thrashing.
well if 1GB is Million Byets of data (the smallest of the small) then 8GB Will be 8 Million Bytes. Depending on What you are DOWNLOADING It can be big or small
