What is the memory frequency? What is the meaning of memory frequency

First, the memory frequency has this
We know that memory performance is determined by memory capacity and memory frequency, and in the same capacity of memory, the higher the memory frequency, the better the performance. At present, the main memory frequency is:
DDR2 memory frequency mainly includes: 333MHz and 400MHz DDR memory, 667MHz, 800MHz and 1066MHz. DDR3 memory frequency: 1066MHz, 1333MHz, 1600MHz. DDR4 memory frequency: 2133MHZ to 4266MHz
DDR2 memory has now been eliminated, many computers purchased in the early years or earlier are DDR2 memory, the memory frequency is generally low, the highest is not only 1066Mhz, now the mainstream memory frequency is 1333MHZ and 1600MHz frequency memory, and with the progress of technology, the future DDR4 will become the mainstream.
Second, how to produce memory frequency
1, look at the memory table surface annotation
Memory will generally mark the memory capacity and frequency, if you are a newly purchased memory, or desktop computer, then you can take out to see, we can read the memory surface nameplate to know
2, boot to see the computer self-test information
After the computer is restarted or started, the hardware self-test will display the main hardware details, which will contain memory frequency and capacity information, we can start the computer hardware to monitor the second screen, press the pause key to pause the self-test screen to see the memory frequency information
3. Check the memory frequency with the help of computer optimization software
Using some computer optimization software can also detect the memory frequency, such as the use of Master Lu to detect computer hardware information can detect the memory capacity and frequency.
Third, the meaning of memory frequency
In a broad sense, the memory asynchronous working mode can be called the memory asynchronous working mode when the memory operating frequency is inconsistent with the external frequency of the CPU. First of all, the earliest memory asynchronous working mode appeared in the early motherboard chipset, which can make the memory work in the mode of 33MHz higher or 33MHz lower than the CPU external frequency, which is simply 33MHz), so as to improve the system memory performance or make the old memory continue to play waste heat. Secondly, under normal working mode (CPU does not overclock), many motherboard chipsets also support memory asynchronous working mode, such as ntel 910GL chipsets, only support 533MHZ FSB, that is, 133MHz CPU9 frequency. However, it can be combined with DDR 266 with a working frequency of 133MH, DDR 333 with a working frequency of 166MHZ and DDR 400F with a working frequency of 200MHZ (note that the external frequency of the CPU 133MHZ and the working frequency of DDR 400 200MHZ have a difference of 66MHZ). But with different memory its performance is different. Again, in the case of CPU overclocking, in order not to make the memory drag the hind legs of the CPU overclocking ability, at this time you can reduce the operating frequency of the memory in order to facilitate overclocking, such as AMD's Socket 939 interface Opteron 144 is very easy to overclocking, many products can easily exceed 300MHZ external frequency, And this if in memory synchronization working mode, the equivalent frequency of the memory at this time will be as high as DDR 600, which is obviously impossible, in order to successfully exceed the 300MHZ external frequency, we can overclock in the motherboard BIOS before the memory set to DDR 333 or DDR 266, after exceeding the 300MHZ external frequency, The former is only DDR 500(some of the best memory can achieve), while the latter is only DDR 400(completely normal standard frequency), it can be seen that the correct setting of memory asynchronous mode helps to overclock success.