Question about Microsoft Windows Server Standard 2003 for PC

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Cache memory Could u please explain me Cache memory and usage of it.

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Cache memory is an processor inbult memory, which keeps the frequently used data in it, So that the processor pickups the data from Cache memory and no need to searchthe RAM and harddisk. So the processor perfomance will get increased.

Posted on Jul 17, 2008

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A cache is a temporary storage area where frequently accessed data can be stored for rapid access. Once the data is stored in the cache, future use can be made by accessing the cached copy rather than re-fetching or recomputing the original data, so that the average access time is shorter. Cache, therefore, helps expedite data access that the CPU would otherwise need to fetch from main memory.

A cache is a block of memory for temporary storage of data likely to be used again. The CPU and hard drive frequently use a cache, as do web browsers and web servers.

A cache is made up of a pool of entries. Each entry has a datum (a nugget of data) which is a copy of the datum in some backing store. Each entry also has a tag, which specifies the identity of the datum in the backing store of which the entry is a copy.

When the cache client (a CPU, web browser, operating system) wishes to access a datum presumably in the backing store, it first checks the cache. If an entry can be found with a tag matching that of the desired datum, the datum in the entry is used instead. This situation is known as a cache hit. So, for example, a web browser program might check its local cache on disk to see if it has a local copy of the contents of a web page at a particular URL. In this example, the URL is the tag, and the contents of the web page is the datum. The percentage of accesses that result in cache hits is known as the hit rate or hit ratio of the cache.

The advantage of cache 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

Posted on Jul 17, 2008

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I have a game called juiced and When i double click to play it it says ,,Juiced requires virtual memory to be enabled".Can somebody please help me to fix this error and play my game please?I have...


Manually manage computer memory loadTOCNode(3, 'moreinformation'); When your computer's physically installed random-access memory (RAM) is running low, Windows adds available memory by using a paging file, generally known as virtual memory, on the hard disk to simulate physical RAM. By default, the virtual memory paging file that is created during installation is 1.5 times the physical RAM on your computer. Therefore, a computer that has 1GB of installed RAM will have 1.5GB of virtual memory.

You can manually change the size of the paging file to make it larger or smaller. You can also optimize virtual memory use by dividing the file space between multiple drives and by removing allocated space from slow or heavily accessed drives. To optimize your virtual memory space, divide it among as many physical hard drives as possible. When you select drives, follow these guidelines:
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  • Avoid putting a paging file on a fault-tolerant drive such as a mirrored volume or a RAID-5 volume. Paging files do not require fault tolerance, and some fault-tolerant computers experience slow data writes because they write data to multiple locations.
  • Do not put multiple paging files on different partitions on the same physical disk drive.
How to manually change the size of the virtual memory paging file loadTOCNode(4, 'moreinformation'); You must be logged on as an administrator or as a member of the administrator's group to complete this procedure. If your computer is connected to a network, network policy settings may prevent you from completing this procedure.

To manually change the size of virtual memory, follow these steps:
  1. Click Start, click Run, type sysdm.cpl in the Open box, and then press ENTER.
  2. Click the Advanced tab, and then under Performance click Settings.
  3. Click the Advanced tab, and then under Virtual memory click Change.
  4. Under Drive [Volume Label], click the drive that contains the paging file that you want to change.
  5. Under Paging file size for selected drive, click Custom size, type a new paging file size in megabytes (MB) in the Initial size (MB) or Maximum size (MB) box, and then click Set.
  6. Click OK to close the dialog box and apply changes.
Note After you change the size of the paging file, you may be prompted to restart Windows. If you are prompted to restart, the changes will not take effect until Windows is restarted.

Notes
  • To have Windows select the best paging file size, click System managed size. The recommended minimum size is the same as 1.5 times the RAM on your computer, and 3 times that figure for the maximum size. For example, if you have 256 MB of RAM, the minimum size is 384 MB, and the maximum size is 1152 MB.
  • For best performance, do not set the initial size to less than the minimum recommended size under Total paging file size for all drives. The recommended size is the same as 1.5 times the RAM on your computer. It is good practice to leave the paging file at its recommended size as performance can decrease if a paging file is too large. However, you may increase its size if you frequently use programs that use lots of memory, such as graphics programs or games.
  • We strongly recommend that you do not disable or delete the paging file because this can lessen the computer's performance. However, if you decide to delete a paging file, set both the initial size and the maximum size to zero, or click No paging file.
How to manually optimize the memory usage loadTOCNode(4, 'moreinformation'); You can optimize your computer's memory usage to reflect your specific needs. If your computer is used as a workstation instead of as a server, you can increase performance by devoting more memory to your programs. Your programs will work faster and the system cache size will remain the default size that was included with Windows XP. Or, you can set aside more computer memory for a larger system cache if your computer is used primarily as a server, or if you use programs that require a large system cache.
  1. Click Start, click Run, type sysdm.cpl in the Open box, and then press ENTER.
  2. Click the Advanced tab, and then under Performance click Settings.
  3. Click the Advanced tab, and then under Memory usage use one of the following methods:
    • Click Programs if you use your computer primarily as a workstation instead of as a server. This option allocates more memory to your programs.
    • Click System cache if your computer is used primarily as a server or if you use programs that use a large system cache.
  4. Click OK to save preferences and close the dialog box.

You may refer to this link http://support.microsoft.com/kb/308417

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3 Answers

Cash Memory


You might want to read the following on cache memory and it's value to the PC. Lot of good information.

http://www.sun.com/blueprints/1102/817-0742.pdf

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1 Answer

Please help


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3 MB L2 Cache, supporting Intel® 64 architecture


I would like to explain about the processors cache using a crude explanation. I'm hoping this may may better sense.

You are doing a thesis for college. Along the way you find you need some information.
Where is it?
It's in a book, down in the basement, under the stairs, in a box of books, and it's the last book on the bottom. There is no basement light.

Down you go into the basement, flashlight in hand. You find the book, and head back upstairs.
Open the book, and find the page/s you need.

Now you need some more info. Where is it? Yep!
Back down in the basement you go.

OR, you could press a couple of keys on the keyboard in front of you, and have your information in seconds.

Basement scenario = Very little cache
Computer scenario = Large amount of cache.

The cache for a processor is a small memory area for the processor. It operates at the same 'Speed' as the processor does. It is the First memory area the processor 'sees'.
('Speed' is a slang term. It's actually Frequency Rate)

This article may explain it better for you,
http://www.hardwaresecrets.com/article/481

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http://en.wikipedia.org/wiki/64_bit
I could fill several pages on here as to an exact technical answer, but I don't feel this would benefit you. My desire is to answer your question the best that I can.

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1 Answer

Cache memory


See page 13 of the MANUAL

There is no cache memory on this board.

Usually cache memory is on the processor these days and is known as L1 and L2 cache.

Years ago L2 cache was on the mainboard.

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