What is the use of old hard drives and memory modules?

Computers below P4 usually use SDRM memory; The P4 grade and above use DDR memory. The two types of memory resolution are that there is a small notch in the middle of the golden finger of DDR memory, and there are two small notches in SDRM.

If your old and new computers are P4, you can mix memory.

The motherboard of P4 computers is divided into mainstream ones, and inter845 and above use DDR memory; Motherboards below 845 are P3 type. Nowadays, some higher-grade motherboards, such as inter915 and above, use DDR2 memory.

Hard disks are not divided into computer grades, as long as they are good and have a port connection, they can be used. You can install two hard drives.

The hard disk of the desktop can be modified with a mobile hard disk, but you have to use a mobile hard disk box to put the hard disk inside, this box can be about 80 yuan, and the mobile hard disk made of the desktop hard disk is too large, which is really inconvenient.

It is best not to install memory, it should be that the frequency may be different, which will limit the speed of your new memory, and the hard disk can be used as a mobile hard disk as long as you buy a hard disk enclosure.

First of all, check it out. What platform are you using?

If the old machine is P3 level. The new machine is P4. Then the memory will not be used. The needle angle is not the same, and it can't be inserted.

Hard disk can be used. You can set the hard disk to be attached from the disk.

There are also desktop hard drive enclosures on the market. About 100 yuan.

It is better not to have memory, different brands and different types may conflict. The hard disk can be changed to a portable hard disk or attached.

Memory, you see if it's DDR, it is estimated that your new computer must be DDR or DDR2, the old computer may be SD, if DDR, you can plug it in, and the hard disk can be used as a portable hard disk.

Categories: Computer, Networking, >> Hardware.

Analysis: The following is all written by myself, I hope it will help you!

They are both storage devices, and both are used to store data, but they are not used for the same purpose.

The computer relies on the CPU to process data and work normally, and all the data is stored on the hard disk, but in reality, the working frequency of the CPU is quite high, and the work efficiency of the hard disk is relatively low, so if the CPU directly reads the data from the hard disk for processing, the hard disk will not be able to keep up with the rhythm of the CPU, resulting in the idle CPU resources. For example, it takes 1 second for the hard disk to read a certain data, and it only takes one thousandth of a second for the CPU to process the data, and then spend the rest of the time waiting for the hard disk to read the next data. The whole process is consumed on the hard disk reading the data, and the CPU actually has very little time to process this data, and most of the time is waiting for it senselessly, which obviously causes a great waste of resources.

To solve this problem, memory came into being.

Memory is also a storage medium, but its efficiency in reading data is much higher than that of hard disk, which better adapts to the needs of the CPU, thereby improving the running capacity of the computer.

With hard disk and memory, the working process of the computer is as follows: all the data is still stored on the hard disk, but some data that is in use or is particularly used is copied to the memory as needed, and the CPU processes the data directly from the memory instead of going through the hard disk.

If the memory is so good, what do you need a hard disk for? Although the work efficiency of memory is excellent, due to the complex technology and expensive cost, it cannot reach the storage capacity of the hard disk, and can only be responsible for some temporary storage, so the hard disk is also irreplaceable by memory.

Finally, let's take that classic example. CPU is like a workshop, responsible for production and processing, hard disk is a raw material warehouse, it is very large, can store a large number of raw materials, but it is far away from the workshop, back and forth transportation is very inconvenient. At this time, a temporary transfer station was built near the CPU, which was the memory.

Although he is not as big as the warehouse, he is close to the workshop, which stores the raw materials urgently needed by the workshop, which improves the production efficiency.

Well, I hope you can see it clearly!

Hard disks belong to external storage devices, and memory belongs to internal storage devices; The data in an external storage device can only be used if it is transferred into memory, and the hard disk is equivalent to a database, which can store the operating system, software, and files.

Precautions for the use of hard disks: 1. The interface of hard disks is generally available.

2. After installing a new hard disk on the computer, it is necessary to partition it, so that users can manage the disk, right-click "This Computer", click "Manage Disk Management", click the hard disk that needs to be partitioned, click "New Simple Volume", and follow the system guidance to operate.

3. Do not disassemble the hard disk without permission, you may lose data.

Data expansion: Hard disk is one of the main storage media of computers, which is composed of one or more aluminum or glass discs. The disc is covered with a ferromagnetic material.

Hard disks include solid-state drives (SSDs), mechanical hard disks (HDDs), and hybrid hard disks (HHD, a new hard disk based on traditional mechanical hard disks); SSDs use flash memory particles for storage.

The difference between memory and hard disk is that memory is the workplace of the computer, and the hard disk is used to store information that is not used for the time being.

1.In a computer, the system and software are provided by memory modules, and the hard disk is the device that provides storage space for the system and software.

2.The memory is made of semiconductor materials, and the hard disk is made of magnetic materials.

3.The actual role of memory is to temporarily store CPU operation data, as well as the data exchanged by the external memory of the hard disk, and it can also be said that memory is the data bridge between the CPU and the hard disk.

4.The information in the memory will disappear when the power is off, and the information in the hard disk can be stored for a long time.

Notes:

If your computer does not have a memory module installed, it will not display the screen, but without a hard disk, the computer will still display the English interface, but you will not be able to log in to the operating system. If there is only an English interface on the computer, it means that there is a problem with your hard drive, or something is wrong with your hard drive, but if your computer is not booting, it is a problem with your memory module.

Memory is one of the most important components of a computer, and it is the bridge that communicates with the CPU.

The running of all programs in the computer takes place in memory, so the performance of the memory has a very large impact on the computer. Memory, also known as internal memory, is used to temporarily store compute data that has been leaked in the CPU, as well as data that is exchanged with external memory such as a hard disk.

As long as the computer is running, the CPU will transfer the data that needs to be calculated to the memory for calculation, and when the operation is completed, the CPU will send the result out, and the operation of the memory also determines the stable operation of the computer.

Memory is made up of parts such as memory chips, circuit boards, gold fingers, etc.

Hard disk is one of the main storage media of a computer, consisting of one or more aluminum or glass discs. The disc is covered with a ferromagnetic material.

Hard disks include solid-state drives (SSD disks, modern hard disks), mechanical hard disks (HDD traditional hard disks), and hybrid hard disks (HHD is a new hard disk born based on traditional mechanical hard disks). SSD uses flash memory particles for storage, HDD uses magnetic disks for storage, and hybrid hard disk (HHD) is a kind of hard disk that integrates magnetic hard disk and flash memory.

The vast majority of hard drives are fixed hard drives that are permanently sealed and fixed in the hard drive.

The differences between a memory module and a hard disk are as follows:

1. First of all, their role, in the computer, the running space of the system and software is provided by the memory module. So what is the role of a hard drive? A hard disk is a device that provides storage space for the system and software, and there is a fundamental difference between the two.

2. Then there is the size of the space, the most common size of the memory module is 4-16G size, and the 64G memory module is already very large. However, compared with (mechanical) hard disks, the common size is at least 500g, and most are 1 to 2t, and some computers can also be strung together into a hard disk group, up to 10t. After all, it is a device that provides storage space, so the capacity is much larger than that of a memory module.

3. In terms of definition, they also have essential differences, hard disk belongs to "read-only memory", while memory belongs to "random access memory". For data reading, when the computer is running, the same two devices read the data, once you disconnect the power to the computer, the data in the hard disk is saved, and the data read in the memory module is gone.

4. Of course, there is also the ** aspect, the ** corresponding to their different models is of course different, especially the solid state drive, in the case of the same capacity, ** is far higher than the mechanical hard disk.