Both the JEDEC and XMP memory profiles are extensions of SPD. It allows your motherboard to know that the RAM is present, as well as tell it what settings to use in order to access the RAM. The SPD (Serial Presence Detect) is a chip found on each memory module. The initial speed of the RAM modules - frequency, timings, voltage - are set according to their SPD values. Among other checks, the RAM is also initialized and tested. That’s a series of basic tests for the hardware, performed under the instructions of the computer’s UEFI or BIOS. When you power on your computer, the first thing that happens is a boot check, also called POST (power-on self-test). How to check if XMP is enabled on your computerĭuring the manufacturing process, every RAM module is set to run at a certain speed that’s a result of its default frequency and timings.XMP alternatives & How to enable XMP on AMD systems. ![]() How to enable XMP for your RAM to increase its speed.
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