32位64位ram rom [英] 32 bit 64 bit ram rom

问题描述

我总是很困惑.RAM是临时的，ROM是永久性的...... ROm存储有关启动指令的指令，我们还说我们已经有4Gb RAM我们的系统是用64位n 32位构建的，这比这个怎么做RAM效应？当我们下载文件时它是由ROM还是RAM照顾？如果我们有32位和16 GB ram和64位与4 gb ram有什么区别？

解决方案

是的， RAM （通常）是临时的，而 ROM 是永久性的。 ROM 不可写。

RAM 大小以字节为单位，因此 4 GB 在具有不同的机器上是相同的（ 32 位vs 64 bit）体系结构。

加载文件时，其内容存储在RAM中。



没有意义在具有16 GB RAM的计算机上运行32位操作系统，因为32位操作系统不能使用，而是4 GB，因此运行32位操作系统。

在计算机上运行64位操作系统只有4 GB RAM也没有意义

因为64位操作系统需要比32位操作系统更多的内存



请看看这里：

http://windows.microsoft.com/en-us/windows/32-bit-and-64-bit-windows#1TC=windows-7 [ ^ ]

RAM和ROM是不同的东西（一般来说，你不再使用ROM了，现在它是闪存RAM，因此更容易更新 - 真正的ROM需要物理替换芯片）



ROM包含工作硬件的最小指令子集：它与键盘，显示适配器和HDD接口，以从HDD引导扇区加载真实代码并开始加载真实操作系统。在那之后，它几乎没有被使用，除了非常非常低级别的东西实际访问硬件（甚至它通常被复制到RAM因为它往往很多，更快）



RAM是操作系统和应用程序使用的内存：所有下载等都由运行在RAM中的代码处理 - 尽管ROM代码可用于低级磁盘访问以保存文件，取决于系统。



暂时忽略ROM：你可能永远不需要直接使用它，它只会增加混乱！ ：笑：

i am always confused..RAM is temporary n ROM is permanent..as ROm stores the instruction about booting instruction, and we also say we have 4Gb RAM already our system is built up with 64bit n 32 bit than how does this "RAM" effect ? when we download a file is it taken care by ROM or RAM ? if we have 32 bit and 16 GB ram and 64 bit with 4 gb ram what makes difference?

解决方案

Yes, RAM is (usually) temporary while ROM is permanent. ROM is not writable.
RAM size is measured in bytes, hence 4 GB are the same on machines with different (32 bit vs 64 bit) architectures.

When you load a file, its contents are stored somewhere in RAM.

It makes no sense to run a 32 bit OS on a computer with 16 GB RAM,
as the 32 Bit OS cannot use but 4 GB of it.
Running a 64 bit OS on a computer with only 4 GB RAM also makes no sense
as a 64 BIT OS needs more RAM than a 32 bit OS

Please have a look here:
http://windows.microsoft.com/en-us/windows/32-bit-and-64-bit-windows#1TC=windows-7[^]

RAM and ROM are different things (and generally, you don't get ROM anymore, it's Flash RAM these days so it is easier to update - true ROM requires a physical replacement of the chip(s))

ROM contains a minimum subset of the instructions to "work" the hardware: it interfaces with the keyboard, display adapter and HDD to load the "real" code from the HDD boot sector and start loading the real operating system. After that, it pretty much isn't used except for the very, very low level stuff to actually access hardware (and even then it's generally copied into RAM because it tends to be a lot, lot faster)

RAM is the memory your OS and applications use: all downloading and suchlike is handled by code running in the RAM - though the ROM code may be used for low level disk access to save the file, it depends on the system.

Ignore the ROM for the moment: chances are you will never need to use it directly, and it will only add confusion! :laugh:

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