I don t know the different brands, but the memory modules of the same frequency are not compatible

Compatible. As long as the frequency is the same. It can also be used with different frequencies, but it will make both memory sticks be lower frequencies.

Yes, if the memory modules are of the same generation and the frequency is not much different.

Memory of the same generation can be mixed if the frequency is inconsistent, but high-frequency memory will automatically be downclocked to low-frequency memory to form a dual-channel with low-frequency memory, while memory of different generations cannot be mixed. For example, DDR2 800MHz memory, if you want to add a DDR4 2400MHz memory, it is not possible, because different generations, the motherboard does not support two types of slots in the first place.

However, if you add a DDR2 667MHz memory, it can be used normally, but the working frequency of both memories will be synchronized at 667MHz, that is, the low frequency is the benchmark.

If the other parameters are also fine, they are compatible.

The selection of memory basically depends on three major items.

The first consideration is the main frequency, because the memory of different main frequencies is plugged together or the motherboard does not support the motherboard at all, which will cause compatibility problems.

For example, the motherboard supports 800, 1066, 1333 and the like, which does not mean that the motherboard can be plugged in at the same time.

For example, the first one is 800MHz, and the second one is 1066MHz. The result is that the 1066 drops to 800 running, which is a "bucket effect" of how much your motherboard supports, which are detailed on the motherboard's box and instructions.

Moreover, it is better to have the same memory brand, otherwise different processes used by different manufacturers may be incompatible even if the parameters are the same.

The second is capacity, although the larger the capacity of the memory, the better. But to be honest, the average user uses 4G of RAM, which is more than enough. Moreover, the 32-bit WinODWS system can only support the memory capacity.

No matter how big the system is, it won't be recognized. Therefore, if you want to upgrade to 4G or more, you must use a 64-bit system. You can right-click on "My Computer" and select what are the bits of the writing system in "Properties".

The third is CL delay, which is a term that cannot be explained in three words and Mandarin. A brief description is as follows.

CL reaction time is another indicator of balanced memory. CL is the abbreviation of CAS latency, which refers to the latency time required for memory to access data, and simply put, it is the response speed of memory after receiving instructions from the CPU. The general parameter values are 2 and 3.

The lower the number, the shorter the time it takes to react. This is a problem caused by the production process, so it is a factor that must be observed when shopping for branded memory. (represents the quality of the manufacturer).

Another interpretation is that memory latency can basically be explained as the amount of time the system waits for a memory response before entering a state where the data is ready for an access operation.

Two memory modules from different brands can be used together.

If the frequency of two memory modules of different brands is different, the system will reduce the frequency of the high-frequency memory module to the same frequency as the low-frequency memory module, which is a waste of resources for the high-frequency memory module.

Different brands of memory with the same frequency will play the maximum effect of memory, so try to choose the same frequency when purchasing, so as to maximize the role of memory.

Different brands of memory can be mixed.

The memory is a plug-and-play component, regardless of the particle, frequency, and capacity, as long as the frequency and capacity of the two memories are within the support range of the motherboard; Regardless of the brand, two types of RAM are generally compatible when used on a computer.

However, there is a great uncertainty about the compatibility of the two memory, that is, the same brand, the same particle, the same frequency, the same capacity, and the same batch of two memories produced by the same manufacturer will also have the problem of incompatibility of the two memories on the same computer.

The more similarities between the two memories, the greater the chance of compatibility, and whether they are compatible or not must be tried on the computer to know.