![]() XMP knows nothing about that - head to the RAM’s Qualified Vendor List (QVL) to check it instead. Things get a little more complicated as these memory modules are qualified only for specific speeds on tested motherboards and CPU combinations. XMP lets the RAM tell the PC a faster set of timings and clock speed it can support and what voltage it needs to do that. While JEDEC - the people behind the DDR4 standard - ratify the well-known speeds like 2400 they’ve been quite behind the desires of consumers and manufacturers, so Intel created Extreme Memory Profile (XMP). Speed isn’t a simple one-figure number - you may see a rated speed like 2400MHz, but you may also see another bunch of numbers like 16-16-16-39 indicating the necessary clock cycles to perform certain types of memory operations. Once you get past pin size and memory capacity, you’ll have to filter down by speed. What it comes down to is not all RAM is created equal. If you’ve built a PC desktop in the last few years, you’ve probably been exposed to the confusing array of DDR4 information when it comes to buying RAM. ![]() 8 February 2020 Technology Linux Hardware I2C Background
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