Wikipedia:Reference desk/Archives/Computing/2022 July 30

= July 30 =

DDR5 ram bouncing between 2400MHz and 1800MHz
I installed CPU-Z to see the speed of my RAM, and the software is displaying both 2400MHz and 1800MHz. It would show 1800MHz for approximately one second, and then switches to 2400MHz for the next second. It keeps on doing this without any action on my part. Is this normal for DDR5? I've only used DDR4 RAM computers before this and have never seen this on DDR4.

I'm only running CPU-Z and has closed all other software, but it's still doing this.

I'm guessing that this might be some sort of the power-saving measure done by the computer, but I'm not sure. The computer model is Dell XPS 17 9720 and the RAM model is SK Hynix DDR5-4800.

Thank you for your help and have a nice day. Daniel T Wolters (talk) 02:01, 30 July 2022 (UTC)


 * I'm assuming you're actually using low power DDR5. As a power-saving improvement for laptops and mobile devices it uses "dynamic frequency and voltage scaling" so what you are seeing would appear to be normal. 41.23.55.195 (talk) 09:39, 1 August 2022 (UTC)
 * "LPDDR5 DRAMs offer additional power-savings using the dynamic voltage scaling (DVS) feature, in which the memory controller can reduce both the DRAM frequency and voltage during channel idle times." Source: Key Features Designers Should Know About LPDDR5 41.23.55.195 (talk) 10:28, 1 August 2022 (UTC)
 * Try booting to the bios by pressing F1 or F5 or F7 or F11 at startup and then adjust the memory power saving settings and frequencies. Andrevan @ 04:45, 3 August 2022 (UTC)