Reasons: 1. The CPU itself does not support high-frequency memory. If the CPU can only support up to 2666, then the memory using 2666 frequency will only work at 2666; 2. The motherboard does not support high-frequency Memory stick, if the motherboard can only support up to 2666, then the memory will only work at 2666; 3. The motherboard bios is set to 2666 by default, and you need to set it manually; 4. The frequency of multiple memory sticks is inconsistent, and the memory frequency will be changed. Run according to the root with the lowest frequency.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
Why did the memory stick he bought obviously have 3200MHZ, and why when he plugged it into the computer and finally tested it, it was only 2666MHZ? For a while, he couldn't find any clue, and even suspected that he might have bought a fake memory stick. So what? Did you really buy a fake memory stick? Let's discuss this issue next.
It is a very common phenomenon for high-frequency memory to run at low frequency. Many people think that this may be because the memory module is broken, or they think they have bought a fake. In fact, there are mainly the following aspects that cause high-frequency memory to operate in low-frequency bands. As long as you find the cause yourself, you can easily solve it.
Reason 1. The CPU itself does not support high-frequency memory modules
You can look at the current processors, take Intel The 10th generation i5 processor only supports 2666MHZ. Only the overclockable processor of generation K supports high-frequency memory. If you are using a CPU that cannot be overclocked at this time, then the highest supported memory frequency is 2666MHZ. , this is also the main reason why many friends clearly support 3200MHZ memory, but can only run at 2666MHZ. However, everyone has noticed that the default frequencies of CPUs released by Intel in different generations are also different. This is like the default frequency of the 10th generation i5, which is 2666MHZ. By the 11th generation, it became 3200MHZ, and by the 12th generation, it was even higher, and the matching memory frequency was even higher.
Reason 2: The motherboard does not support high-frequency memory modules
If the motherboard does not support it, there is also no way to use high-frequency memory modules. For a simple example, if you choose It is a processor that can be overclocked. It defaults to 2666MHZ and can be overclocked to reach 3200MHZ. If your motherboard does not support it, everything is in vain, because different motherboards have different chipsets and different memory frequency support. This Sometimes it is useless to just support the CPU and memory. To be precise, the motherboard is the key to determining whether the memory frequency can run at full speed. Therefore, when choosing a motherboard, you must check what frequency the motherboard supports. When the time comes, you will Just buy according to the frequency he supports, otherwise it will equal zero no matter how high it is.
#So the question here is, does the memory frequency need to be fully supported by the motherboard and CPU?
Theoretically, this is true, but if your motherboard and memory support overclocking, then even if the CPU cannot be overclocked, the memory frequency can be reached by overclocking the motherboard and memory, so the key to memory frequency is still in the motherboard. As for the memory itself, generally speaking, Intel Z series motherboards support overclocking, while B series and H series do not support overclocking. For motherboards that cannot be overclocked, it is recommended that you just buy memory at the default frequency of the motherboard.
No matter how high you buy, it will run at the frequency supported by the motherboard. In addition, many motherboards now support high-frequency memory modules, but you need to go to the BIOS and enable xmp to preload the overclocking settings of the memory, so for Both the motherboard and memory support high frequencies but if they cannot be reached in actual measurements, first check whether you have enabled the XMP automatic overclocking function.
Cause 3: The motherboard bios is set to 2666 by default
If the processor or motherboard supports high-frequency memory, but you have not entered the bios to open xmp or manually adjusted it to 3200 Frequency, at this time the memory will work at 2666 by default and needs to be set manually.
Cause 4: The frequencies of multiple memory sticks are inconsistent
If the memory frequencies are inconsistent, the system will run the memory frequency according to the lowest frequency. For example, if you are a The memory is 266MGHZ, and the other root memory is 3200MHZ. If you plug two memories of the same type and different frequencies together, the system will run at the lowest 2666MHZ by default and not the highest 3200MHZ
Expanded knowledge: Interpretation of parameters and considerations when purchasing memory.
1. Memory size refers to how big the memory is. The general memory is 8G, but there are also 16G and 32G. For example, for a home notebook or desktop, 16G-32G is almost enough.
2. DDR is also called "double rate synchronous dynamic random access memory". The larger the number after DDR, the faster the random access memory.
3. The memory frequency indicates the speed of the memory, which represents the highest operating frequency that the memory can achieve.
4. When purchasing memory, you need to look at these four points to see if it is consistent with the memory information on your computer. Do not think that the more expensive the memory, the better. Sometimes if the memory frequency is inconsistent, it will also lead to a blue screen. Problems such as the machine not shutting down and running speed decreasing.
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