I d like to add a memory module, but I don t know what size to buy to make my computer compatible

To add a memory module, it is recommended to use the same brand, the same frequency (such as DDR400), and the same capacity (256M) of memory. To know your own memory specifications, the best way is to open the case and remove the memory module to see. Just be careful not to break the machine.

If you don't dare to open the case, you can use the CPU-Z software to detect it.

It's a great app to use CPU-Z, which detects the CPU, but it can also detect the motherboard and memory, and the functionality is unambiguous! It can detect whether the CPU is overclocked, whether it is 32-bit, the model of the motherboard, the number of memory slots of the motherboard, the model of the memory, the speed, etc.

Run CPU-Z, click on the "Memory" tab, and the memory frequency will be clearly displayed.

133MHz is DDR266

166MHz is DDR333

200MHz is DDR400

And so on, ......

CPU-Z Chinese version。

When did you buy the machine? If it's about years, it should be DDR memory. Identifying memory mainly depends on the notch in the memory, if there are 2 notches, it is the old-fashioned SDRAM memory; If there is 1 notch, it is DDR1 or DDR2 memory.

To distinguish DDR1 and DDR2 memory is to look at the pins, the pins of DDR1 memory are relatively large, while the pins of DDR2 memory are relatively small.

Adding memory is generally based on the principle of compatibility and sufficiency. For example, if you have a 256 RAM now, you can meet most of your needs by buying a 256 512.

Find a software CPU -z to check the brand and model of your memory, preferably the same one. However, sometimes it is not the same, and it can be attached. I just have a random memory on my machine. There haven't been any problems yet. Hehe.

Same brand, same model, same capacity.

Take a look at your motherboard's instructions.

It's better to buy another memory than to change to a single root.

What is your other one, just buy multiple of the same and you can pull.

How to choose a computer memory module? Knowledge of assembling computers 20

The computer has two memory modules of different sizes.

OK. The capacity is different, just can't group dual-channel memory.

It is also possible to use different frequencies, and the memory module with the lowest frequency shall prevail and be automatically declocked. As long as the type and specifications of the memory module are the same, you can do it. Type: DDR, DDR2, DDR3; Specifications: Desktop memory, laptop memory, server-specific memory.

There may be compatibility issues between the motherboard of your computer and the memory modules, and between the memory modules and the memory modules. Blue screen at the lightest.

If an error is reported, the computer will not be able to boot up. The greater the difference, the higher the probability of incompatibility between memory modules, and the smaller the probability of incompatibility between memory modules with higher similarity.

In fact, as long as the memory modules are plugged in and can run stably for a period of time, it means that there is no compatibility problem, and there will be no compatibility problems in the future. If there is a compatibility issue, it will react quickly (it won't turn on; blue screen error). But don't worry, it won't damage other devices, just unplug the incompatible memory module and it will be back to normal. ‍

1 Theoretically, it is possible to plug in memory of different frequencies, but plugging in will only run on the frequency of low-frequency memory at the same time, otherwise it will not be synchronized. And the compatibility is not very good.

2 If the motherboard supports dual-channel memory, it is recommended to use the dual-channel composition mode of 2gx2, which is better than a single one. However, you must first figure out how much memory capacity the motherboard can support, otherwise it will not be recognized.