Want this question answered?
phisical
To use windows aero in vista operating system 512 mb of ram is required
Search Time
64KB
The minimum system memory required for the ATI Radeon HD 4890 is 500 Watt or greater power supply with two 75W 6-pin PCI Expresså¨ power connectors recommended.
The system consists of CPU, Main Memory, I/O Module, and System Bus.
In programming, it refers to a common pool of memory that is available to the program. The management of the heap is either done by the applications themselves, allocating and deallocating memory as required, or by the operating system or other system program. Source: Answers.com
Another name for working memory is short-term memory. It refers to the system in the brain responsible for temporarily storing and managing information required to carry out cognitive tasks such as learning, reasoning, and comprehension.
Some graphics cards have memory on board the card itself. Others rely on the memory chips on the system board for memory , thus sharing memory. Suppose a PC has a specification of 256MB of memory and 64MB shared graphics. The memory available for your operating system and applications will be 192MB. If a PC had the same specifications but the 64MB were dedicated, the 64MB required to run the card would use this memory, leaving the full 256MB for your operating system and applications. In short, shared = compromise, dedicated = better.
A page fault occurs when a program accesses a memory page that is not currently in physical memory (RAM). This triggers the operating system to fetch the required page from secondary memory (disk) into RAM, allowing the program to continue execution.
I think I am answering this correctly. Memory is also called RAM or DDRAM, SDRAM etc. 512MB of memory is 512MB of memory. If you check the back of your software cases you will notice that it gives you the system minimum and recommended for memory required. Example windows 7 recommends 1GB of system memory minimum to install and run.
Role of the Memory management unit in Operating system Every program for its execution requires some space in computer memory which is provided by memory management unit using virtual memory that provides the external storage addressing location for the programs that does not have too much space in main memory for their execution and saved them in secondary memory but when required loaded them again in main memory. This deallocation and reallocation of programs in main memory deals with concurrency. At last, we say that loading capabilities of programs with the memory addressing is there in it.