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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.
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That would depend on several things, among these are:
- The color depth of the image. The RGBA standard requires 32 bits of information per pixel. An 8 bit per pixel image will represent up to 256 separate colors
- Any compression algorithm that the image has bee subject to. JPEG compression destroys image information but gives a smaller image size than PNG compression or an uncompressed BMP (or uncompressed RGBA)
In the case of an uncompressed RGBA image you will have about 250000 pixels in your megabyte of data (a square 500 pixels on a side)
In the case of an 8 bit bitmap you have four times the area or 1000*1000 pixels (minus a little for header overhead etc.)
When it come to images that are compressed (both lossy like JPEG- JPG, or non-lossy like PNG) it depends on the image because it is easier to compress large fields of single colors than complex imagery like details of branches of a tree.
At maximum compression A 1000 *1000 pixel entirely white image weighs in at 4400 bytes as .png and 6100 bytes as jpg.
With random noise spread across the image the .png (no loss of information mind you) weighs in at 1500000 bytes (1,5Mb) While the Jpeg due to maximum compression had no color information left at all but "weighed" only 51700 byte (51.7 kb) With as little compression as possible the file size of a (good looking) jpg was 1473000 (1,47 Mb)
So there are a lot of things to consider!
dual channels
How much ram memory can you put on a dell OptiPlex gx520?
You can upgrade your Dell OptiPlex GX620 SFF upto a maximum of 4.0 GB, with maximum of 1GB per slot in 4 (2 banks of 2) memory slots. The Dell OptiPlex GX620 SFF takes the PC2-4200 DDR2 SDRAM DIMMs. Supports Dual Channel DDR. Memory Type.
What are memory sockets or slots and how are these divided into bank?
Memory Sockets or Slots are the place where memory RAM modules are inserted in the motherboard. The Dell OptiPlex GX620 SFF has 4 (2 banks of 2) memory expansion slots. A memory bank is a group of memory expansion sockets, a bank must be completely filled with memory modules of the same size and type in order for the system to recognize and address the memory. i.e. :
2 sockets (2 banks of 1) This indicates that there are 2 memory slots. These are divided into 2 banks, and each bank consists of one memory slot. So you can add memory one piece at a time for the system to use.
3 sockets (3 banks of 1) This indicates that there are 3 memory slots. These are divided into 3 banks, and each bank consists of one memory slot. So you can add memory one piece at a time for the system to use.
4 sockets (2 banks of 2) This indicates that there are 4 memory slots. These are divided into 2 banks, and each bank consists of two memory slots. So you must add memory two pieces at a time (they must be the same size and type of memory) in order for the system to benefit from the upgrade.
8 sockets (4 banks of 2) This indicates that there are 8 memory slots. These are divided into 4 banks, and each bank consists of two memory slots. So you must add memory two pieces at a time (they must be the same size and type of memory) in order for the system to benefit from the upgrade.
12 sockets (3 banks of 4) This indicates that there are 12 memory slots. These are divided into 3 banks, and each bank consists of four memory slots. So you must add memory four pieces at a time (and they must be the same size and type of memory) in order for the system to benefit from the upgrade.
How do I install memory on my Dell OptiPlex GX620 SFF?
Memory installation help guides can be found at the following link.
Memory Installation Guide
184-pin DDR DIMM Installation Guide
168-pin SDRAM DIMM Installation Guide
If you have a memory card will your picture be in the computer if you delete it?
It depends. Could it be we are talking about the memory card in a digital camera? Generally with the cameras I have used, when pictures are selected to put on to your computer they are not erased from the memory card. If you want them to be (I usually do because I don't want to have to go through the camera itself and delete old pictures one at a time when I need more memory) you can plug in your camera with a cable to your device, go to Computer (on a Windows computer) click the icon for your camera, find the folder where your pictures are stored, highlight them all (Using Control+A if you wish) and then right click on one of the images while they're all highlighted and select "cut" and then go to the folder on your computer you want and right click and slect "paste." Alternately, a safer way (in case something goes wrong with the file transfer) is to highlight the pictures listed in your camera's folder, right click, select "copy" and then go to your computer to the appropriate folder, right click, and select "paste." Then once the transfer is complete and you're sure the images open up and display okay you can return to the other folder with the images on your camera and push "delete."
Why CPU and memory are not connected directly with peripheral devices?
If they were, the devices would all have to have a separate interpreter for the processor and in order to communicate amongst themselves they'd have to go through the processor, which would slow the computer down. If everything is connected to the motherboard and the motherboard interprets everything for the processor, it's cheaper and faster.
Yes, but they are slightly larger (for now) than the "thumb drive" versions.
As of 2011, the price for large-scale flash drives has continued to come down. Some 256Gb drives fell to less than $700 USD, and modifications can be made to existing drives to allow 1 terabyte of data storage. The price for an actual 1 Tb drive (solid-state drive) was still in the $3000 USD range in early 2011.
1 TB = 1 million meg, or 1 thousand gig 1 mega = 1,000,000 (million) 1 giga = 1,000,000,000 (billion) = 1,000 megas 1 tera = 1,000,000,000,000 (trillion) = 1,000 gigas = 1,000,000,000 megas
How does adding RAM affect video card?
Video cards have their own memory. Adding RAM to the machine will help graphics performance, but not as much as a card with more on-board memory.
How do police use ict in their work?
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What are the three basic categories of items that can be stored by memory?
Operating system and system software; application software; data being processed
What storage device can hold the most information?
in general, a HDD or a tape casette. HDD tend to be used for normal computers and for servers, tape casettes tend to be used for the backup of servers (they're the things that you see spinning on computers in old fashioned movies
The brain.
What is the other name of internal memory?
It's used to access data in a random order in different places.
The more, and faster RAM the quicker it will find what the user ask for and the more amout of data it can handle at a time. It's used because a Hard Disk can only find data in a specific order since it have mechanical parts(exception is SSD).
When you boot up a program all it's data will transfer to the RAM so it can be accessed quickly. When you shut off the computer the RAM will empty itself.
Also for further research on how a computer use memory and data storage on running applications: "cache".
What is the maximum RAM of the Dell Latitude D600?
The maximum you could install on this notebook is 2Gb. It runs DDR memory. So the best thing would be to purchase 2 x 1Gb Sticks.
The transmission speed generally is measured by transferring a specific block of data of known size across the transmission medium and timing the duration between initiating transfer and successful receipt of the final datum. For instance, to test the speed of a modem connection, you could create a known file of, say, exactly 1,000,000 bytes, then initiate a transfer of that file across the modem link. If the transfer takes 7 minutes 25 seconds, you have a data rate of 1,000,000 bytes per 7:25, or 2,247 bytes per second.
Data transmission speeds are usually given in bits per second, or bytes per second. For fast connections, this is sometimes expressed as kilobits, megabits, or gigabits per second, or as kilobytes, megabytes, or gigabytes per second. One must be very certain to indicate whether a data rate is counting bits or bytes, and one must be aware that marketers will try to conceal that difference; a marketing data rate may be expressed in bits per second but made to look like bytes, or it may be expressed as the theoretical maximum data rate, rather than the actual data rate. An example of the latter is the 802.11g wireless networking standard, which is always shown as 54 megabits per second. That is the raw data rate; once signaling overhead, error correction, link control, and other non-data information is excluded, the actual rate for data transfer in a perfect connection is closer to 33 megabits per second.
How do you convert kilo bytes into giga bytes?
To get a pretty much correct answer, multiply the KB by one million. (There are about one million KB in one GB).
What is smallest addressable unit of storage on a disk?
It is called a block (or sector). The size of the block varies depending upon the size of the disk, advanced preferences (the size of files normally being used on that disk), and the filesystem being used. They normally run from 512Bytes to 64KiB. As disk capacity continues to grow, look for even larger block sizes to come :-)
The micro chip is an amazing invention used to track dogs. These lost dogs can be scanned and returned to their owners.
How many tega bytes in a giga byte?
It depends on if you're using 1000 (103)or 1024 (210) as a multiplier, but either 1/1000 or 1/1024. A terabyte is larger than a gigabyte.
What type of memory loses its contents when power is turned off on your computer?
RAM, or random access memory.
What is the maximum total memory and maximum memory per slot supported by Intel D945GCR motherboard?
http://www.intel.com/support/motherboards/desktop/d945gcpe/sb/CS-027116.htm
- 2 GB maximum total system memory
What difference between cache and ram?
"RAM" is Random Access Memeory. It's the high speed memory that's on the motherboard and allows the computer to load instructions and data quickly into the processor during normal operation.
"Swap" space is an area on the computer disk that has been reserved as space for overflow. When there are too many applications CURRENTLY RUNNING or applications that are CURRENTLY RUNNING that are too large, large blocks of data are swapped into the swap space, freeing up some of the high speed memory.
Typically, if the operating system is reasonably intelligent, data is only swapped to disk that is not currently being used.
Excessive disk swapping will slow your computer dramatically. It's always a good idea to remove unnecessary applications from your startup.
Your computer can have many applications on disk, as well as a lot of data. Only the CURRENTLY RUNNING applications can be impacted by swap space.
What is the difference between virtual memory and physical memory?
I think so this will help you
Virtual memory does not physically exist while physical memory does.
Where there is not enough physical memory available for the required application, the application and its data are staged through the physical memory with the excess mapped onto a section of hard disk drive. Using this technique the memory appears to be bigger that it actually is (although it is slowed down by the staging process). The bit on the disk is called the virtual memory.
What is the approximate clock speed of DDR3200?
usuali is 200mhz but i gues its 400mhz becase its saing double or somthing....
