What do you know about the secrets of memory?

What about memory? In addition to price increases, there is almost no other news, but do you really understand memory? In particular, there are now some unscrupulous traders using fake memory to sell high prices. Do you know why fake memory can be a real mess? Today Xiao Bian talked about this matter.

The reason why memory can be falsified is still related to an obscure little thing in memory - this is the SPD chip.

The SPD is an rewritable ROM on the memory that records many important information of the memory, such as memory chip and module manufacturers, operating frequency, operating voltage, speed, capacity, voltage, row/column address bandwidth and timing And other parameters. The SPD information is usually written in ROM chip by the memory module manufacturer according to the actual performance of the memory chip before leaving the factory, and these can be queried by a detection tool such as CPU-Z or AIDA64.

This thing is equivalent to the motherboard's BIOS, the reason why the false memory can go awry, because illegal traders use a special tool to copy a memory of identity information.

With special tools + software, fake memory can write any brand name, serial number, model number, or even unrealistic frequencies (low frequency memory strong write high frequency parameters).

Someone may ask when it comes to this, how can you tell? To tell the truth, it is difficult to know that some unscrupulous merchants can completely find underground factories to produce realistic security labels. For now, Xiao Bian knows that the only one that can be effectively guarded against is Kingston. It is estimated that because of the large scale of the tree, so after being counterfeited, Kingston launched a set of anti-counterfeiting and truth-telling systems including WeChat, which is better than simple anti-counterfeiting labels. So much more.

Not only the frequency, I do not know if you noticed that there are some weird parameters in the memory information map in front of Xiaobian, such as "CL-tRCD-tRP-tRAS", which are collectively referred to as timing. For advanced players, tuning these timing parameters is also key to optimizing memory.

CL: The clock period required for column addressing (the number of cycles indicates the length of the delay)

tRCD: Difference between row addressing and column addressing clock cycles

tRP: Pre-charge required clock cycle before next storage cycle

tRAS: The total time period from the beginning of the operation to the end of addressing when storing data for a row

By manually adjusting these timing parameters in the motherboard BIOS, memory performance can be improved on a program-by-program basis. However, this can easily cause instability in the system. After all, the default values ​​given by memory vendors are conservative and guaranteed.

Many small partners will say that these are too difficult for me to understand, but they also want to have these advanced optimization effects. This kind of situation is not an option either - but spend a little more money and buy XMP certified memory.

XMP and manual overclocking, optimization results are basically the same, so it can be seen as automatic memory overclocking technology. All XMP standard memories supporting Intel have pre-stored two sets of timing settings and frequencies. This way, through this authentication mechanism, memory can run at more efficient settings and improve performance. Do not underestimate the role of timing optimization, generally can bring at least 5% to 10% of the memory performance improvement!