This article will tell what physical memory is.
Physical memory is relative to logical memory.
Common physical memory storage specifications are 256M, 512M, 1G, 2G, and so on.
With the development of computer hardware, 4G, 8G and even larger capacity storage specifications have emerged.
Virtual memory can be used to replace physical memory when it is inadequate.
When checking the computer configuration, we should mainly notice the physical memory.
Concept
Description in app
Physical memory is one of the most important resources of computer.
Windows memory manager is responsible for allocating memory to operating process, devices driver and operating system.
Description in CPU
Physical memory is the memory space which CPU address lines can seek directly.
For example, 8086 only has 20 address lines, thus, the addressing space is 1MB.
And we can say 8086 can support 1 MB physical memory.
Although a memory stick of 128M has been installed on the mainboard, 8086 owns 1M physical memory space.
Similarly, 32-bit CPU over 386 can support the maximum physical memory of 4GB.
It is a computer system memory management technology, which belongs to computer program.
While physical memory is hardware.
When you are dealing with large program sometimes, the system memory may be not enough.
But the processing speed of physical memory is over 30 times faster than that of virtual memory.
Memory limitations
In 64-bit Windows client, different SKUs support different memory size.
Standard memory management mode of X86 can support up to 4GB physical address visit.
In early times, people dont need to consider when client support is over 4GB.
This is because few computers have so large memory capacity, even the servers.
So, Windows product group has conducted many tests over the Windows XP computer more than 4GB.
And this function also supports memory over 4GB.
This is because we have little chance to encounter such problems.
