How to differentiate between memory types and view memory compatibility

Often encounter someone want to replace memory do not know what kind of memory to buy, also often meet people ask upgrade memory to buy what kind of memory is compatible, here to share a bit, incidentally popular science. The hand party can jump straight over to see the summary:

1, different generations of memory is incompatible with each other. Memory can be divided into DDR1, DDR2, DDR3, here 1, 2, 3 refers to the first generation of memory, these memory is incompatible with each other, because different generations of memory size, slots will be different. Such as:

2. Mixing memory at different frequencies may result in incompatibility, note is possible. For example, the same is DDR3, but there are different frequencies. As follows:

Ddr1:266mhz 333MHZ 400MHZ

Ddr2:533mhz 667MHZ 800MHZ

Ddr3:1333mhz 1600MHZ 2133MHZ

This information on the memory bar will be noted that the notebook memory bar may be written less intuitive, you can use the following information to find the corresponding information:

PC 2100 is DDR1 266MHZ

PC 2700 is DDR1 333MHZ

PC 3200 is DDR1 400MHZ

PC2 4200 is DDR2 533MHZ

PC2 5300 is DDR2 667MHZ

PC2 6400 is DDR2 800MHZ

PC3 8500 is DDR3 1333MHZ

PC3 10600 is DDR3 1600MHZ

PC3 12800 is DDR3 2133MHZ

So, in fact, the frequency of light is also able to distinguish between different generations of memory. In addition, when the memory of different frequency is used simultaneously, the high frequency will automatically reduce the frequency and the low frequency memory to be consistent. For example, your computer installed a DDR3 1333MHZ and a DDR3 1600MHZ, then the system runs, can only be 1333MHZ, which formed a certain waste.

3, different brands of memory mix easily lead to incompatibility. In particular, some of the main performance, overclocking and the like, because there may be a specific optimization, its compatibility will be reduced.

Summary: Said so much, summed up is to ensure compatibility, can buy the same brand, the same generation, the same frequency of memory.

Understanding memory compatibility issues and the distinction between memory can not be purchased immediately. You need to know a few more questions. 1. How much memory is supported by your operating system. 2. How much memory is supported by your computer motherboard. 3, their motherboard support for the first few generations of memory, that is, what kind of socket can be plugged in.

1, different operating systems support the system memory is not the same. For example: XP system 32-bit maximum support 4g,win7 General Home Edition 64-bit maximum support 8g,win7 Ultimate 64-bit maximum support 192G. Specifically available through the following Microsoft MSDN documentation online query, including all Microsoft operating systems, very full.

https://msdn.microsoft.com/zh-cn/library/aa366778 (en-us,vs.85). aspx

This problem is still very good solution, choose a corresponding system installation is good.

2, the above mentioned operating system memory maximum is theoretically, in fact, your computer's maximum memory is also limited by your computer motherboard, you need to query your computer motherboard to support the maximum memory, usually there are two ways.

The first way is to install the software such as LU master hardware testing to see, for those who do not understand the computer.

The second way is through the operating system query, for those who do not want to install software on the view. method is as follows,

(1) Click start → run

(2) Input cmd

(3) Enter WMIC memphysical get maxcapacity

(4) Get a string of numbers, in which the unit is KB, it is converted, that is, the motherboard supports maximum memory =33554432kb/1024/1024=32g

3, there are two ways to see the type of memory supported by the computer board.

The first approach is to check for hardware detection by installing software such as Master Lu, which is suitable for people who do not know much about computers.

The second way is simple and rough, open the computer to view the existing memory, usually the memory is on the top of the memory model information, specifically how to distinguish the above has been mentioned.

PS: Now some desktop boards may be more memory slots, and compatible with DDR2, DDR3, is the two slots have, for example, you find your motherboard plug is two DDR3, but the motherboard actually has 4 memory slots, the other two may be DDR2, So it's about checking the motherboard slot information to learn more.

Summary: In general, understand your motherboard support how much memory, support the first few generations of memory OK, of course, can understand the operating system to support how much memory is better.

How to differentiate between memory types and view memory compatibility