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Theoretically, try to use the same brand and frequency as much as possible, and there is no requirement for capacity. You can buy a 512 plug in, and there will generally be no problems, and even if there is a problem, just sell the 256 again, hehe. However, the occurrence rate of this situation is almost zero.
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This mainly depends on the compatibility of the motherboard chipset, if the compatibility is better, different brands, frequencies, and capacity of memory can also be mixed, my previous machine is like this, if the compatibility is not good, there is no way, the same brand, frequency, capacity may also appear that the memory is unstable to work.
Personal experience.
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It is best to be of the same brand and frequency.
As for capacity, it doesn't matter if you don't have dual channels.
Does your motherboard support dual channels?
If you support it, you can only add 256.
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First of all, check how much memory your machine supports at most, if it doesn't support adding more, it's useless. The brand should be the same, the capacity can be different, and the frequency should not be lower than your current memory frequency (otherwise it will slow down the memory access speed).
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It's better to use memory of the same brand, so that the compatibility will be better, if it's not the same brand. Just unplug one when you redo the system! As for the capacity, it's in with your own choice!
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The most important thing is the compatibility with the motherboard, and the first class is to change the number of the same brand
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Brand hosts can add memory modules, and after adding memory modules, the memory in the configuration can be larger and run faster.
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The hard disk host can add a memory module, but although the brand host can add a memory module, once the chassis is opened privately. The brand's warranty commitment is terminated, and it will not bear any responsibility for the incompatibility between the memory module and the motherboard.
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Brand hosts can increase memory modules, but most brand hosts have certain requirements for memory modules, so you must pay attention to the brand and model before buying to avoid mismatch and unusable situations!
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There are two common scenarios for memory upgrades:
1. Add a memory module to the memory slot of the computer.
2. Replace the memory module that is larger than the original memory module, so that the computer memory can be upgraded to a larger range than the original memory. For example, if a computer has 512 memory, the memory will be upgraded to 1G or more.
The correspondence is as follows: 1. Add memory, that is, upgrade to dual-channel, 1First of all, make sure that the memory of your computer (i.e. what you used to have) is SDRAM or DDR or something else (e.g. more advanced), and be careful not to mix the two types of memory, as they have different voltages and different ways of processing data.
Here's what you need to do to insert DDR memory:
2.Generally, after adding memory, the system will automatically recognize it, and the motherboard will read the information back when it is booted, and automatically set the CAS and other parameters of the memory. Of course, this feature can also be blocked (in BIOS settings) and set manually (in Advanced Chipset Features).
Note: The one with the lowest memory frequency is used as the standard.
3.It's best not to plug different memory brands together.
4.It is best to choose the same brand of memory with the same specifications (except capacity) so that the possibility of problems will be greatly reduced.
2. Replace with a larger memory, pay attention to the compatibility of the motherboard, otherwise the motherboard may not support your new memory after replacing the memory. The best point of the general brand, but there are many fakes.
Have a nice day!
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If you upgrade to dual-channel memory, and finally choose the same brand and specifications as the original memory, it doesn't matter if you don't have this requirement, of course, it's best to choose brand memory, so that the quality is guaranteed, and the compatibility is better, and the brand is Kingston (you must buy the real thing, there are indeed more fakes, I was fooled).
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Try to add the same strips, for example, if you have 512, add a 512, add 1g to 1g, the brand does not require the same but try to buy the same, because different brands may not be compatible,
Yes, it's easy to say, but it's another way to do it, think twice.
The memory upgrade mainly depends on whether your motherboard is suitable or not, and now the mainstream of memory is 1G, if your computer is a motherboard that you bought a long time ago, it is a ...... that does not match the current memory moduleSo you should think about the motherboard first!
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