What is the serial presence?

Detect serial presence (SPD) is a protocol used to automatically determine the correct settings that are used for the computer memory system system. During the self -service test (POST), the basic input/output system of the computer (BIOS) connects to the SPD. They exchange important memory information and the BIOS automatically configures the system. For many years, it has been difficult to modify the information sent during the SPD, but many modern BIOS systems have internal features that allow users to change and tune memory performance. The serial presence of Detection is an improvement compared to an earlier form of automatic configuration, detecting a parallel presence. It determines the basic capabilities and specifications of the machine to set the stable profile for hardware. As the start -up process continues, this profile uses the operating system, and then by determine applications as they will run.

Setting the modern memory module can be quite complex. There are a number of different parameters that spol mustTo make the hardware stable to keep the hardware. Manufacturers determine the correct settings of these factors and insert the profile into the serial presence of the chip.

Serial presence detects the module on a piece of computer memory, it is generally located at one end inside a small chip. This computer chip is separated from the rest of the chips on the module. In most cases, this chip will contain all relevant information about the memory hardware, but will usually have space to store additional information if necessary.

This additional space may be empty or can have insignificant information for users. One of the more common information concerns improvement of memory performance, the process of capacing. When the initial memory profile is assembled, it is very conservative. The profile is set far below the actual hardware capacity to ensure its stability.

In the past it was very difficult to change the information sentAnene with a system of detection of serial presence. On modern computers, overclocking has become so common that the methods are built directly into the BIOS. The secondary profiles contained in the serial presence often detect the chip to have completely different settings, allowing overclocking to easily select a new profile if they want.

In addition to editing information in the BIOS, it is possible to change the default information sent by the SPD. Depending on the type of computer hardware and memory manufacturers, third -party programs can be downloaded to allow the user to change their SPD information. This changes the default settings sent to the BIOS during publication, which will lead to the main changes in performance.