What is the memory frequency?

The frequency of the memory module refers to the main frequency of the memory, which refers to the highest operating frequency that the memory can achieve. It can be used to indicate the speed of the memory. There are two ways to express the frequency of memory modules, namely working frequency and equivalent frequency. The working frequency is the actual working frequency of the memory particles. The equivalent frequency is different. The equivalent frequency of DDR memory is twice the working frequency. The equivalent frequency of DDR2 is Four times the operating frequency.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What is the frequency of the memory module?

The frequency of the memory module refers to the main frequency of the memory, which refers to the highest working frequency that the memory can achieve. Frequency is used to indicate the speed of memory. Memory clock speed is measured in MHz (megahertz). The higher the memory frequency, to a certain extent, the faster the memory can achieve. The memory frequency determines the highest frequency at which the memory can work normally.

There are two ways to express the frequency of memory modules, namely the working frequency and the equivalent frequency. The working frequency is the actual working frequency of the memory particles. The equivalent frequency is different. The equivalent frequency of DDR memory is twice the working frequency. , the DDR2 equivalent frequency is four times the operating frequency.

Description:

The clock speed of a computer system is measured in frequency. The crystal oscillator controls the clock speed. When a voltage is applied to the quartz wafer, it vibrates in the form of a sine wave. This vibration can be recorded through the deformation and size of the wafer. The vibration of the crystal is expressed in the form of a sinusoidal harmonic changing current, and this changing current is the clock signal. The memory itself does not have a crystal oscillator, so the clock signal when the memory is working is provided by the north bridge of the motherboard chipset or directly by the clock generator of the motherboard. That is to say, the memory cannot determine its own operating frequency. Its actual operating frequency It is determined by the motherboard.

How to check the memory frequency

Method 1: Via CMD command

1. Open Command prompt, open CMD while running

2. Enter the command in the command prompt: wmic memorychip

The red box above is the frequency of the memory module. The editor has two memory modules, DDR3 1600.

Method 2: Memory detection tool

1. Download the Chinese version of CPU-Z

2. After opening it, in the memory item, we You can see that the memory frequency is 799.9MHZ, but since it is dual-channel, we have to multiply by 2, so the memory frequency is about 1600.

Extended knowledge:

The memory asynchronous working mode contains a variety of meanings. In a broad sense, any memory When the working frequency is inconsistent with the CPU's FSB, it can be called the memory asynchronous working mode.

First of all, the earliest memory asynchronous working mode appeared in early motherboard chipsets, which can make the memory work in a mode that is 33MHz higher or lower than the CPU FSB (note that the difference is only 33MHz), so that it can Improve system memory performance or allow old memory to continue to use its residual heat.

Secondly, in normal working mode (CPU is not overclocked), many motherboard chipsets also support memory asynchronous working mode, such as Intel 910GL chipset, which only supports 533MHz FSB or 133MHz CPU FSB. But it can work normally with DDR 266 with an operating frequency of 133MHz, DDR 333 with an operating frequency of 166MHz, and DDR 400 with an operating frequency of 200MHz (note that at this time, the CPU FSB of 133MHz and the operating frequency of DDR 400 of 200MHz are already 66MHz different) , but the performance is different when paired with different memories.

Again, in the case of CPU overclocking, in order not to let the memory hinder the CPU's overclocking ability, the working frequency of the memory can be lowered to facilitate overclocking. For example, AMD's Opteron 144 with Socket 939 interface is very It is easy to overclock. The external frequency of many products can easily exceed 300MHz. If the memory is in synchronized working mode, the equivalent frequency of the memory will be as high as DDR 600. This is obviously impossible. In order to smoothly overclock the external frequency of 300MHz, Frequency, we can set the memory to DDR 333 or DDR 266 in the motherboard BIOS before overclocking. After overclocking the 300MHz FSB, the former is only DDR 500 (some top-quality memory can reach it), while the latter is only DDR. 400 (completely a normal standard frequency), it can be seen that correctly setting the memory asynchronous mode will help overclocking success.

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