Why does RAM change its frequency by itself?

[aquielisunari]

Guess that pretty much covers it. Recently answered a questions and 1600MHz RAM was reporing a speed of 364(or somewhere near there) and soon after that screenshot was taken it was at 662MHz(another screenshot was posted). It was also at 654MHz.

I understand Speccy will show half the speed due to the RAM being dual channel. The OP only has 1 module.

Thermal throttling or???

 

[smorizio]

if it an older mb make sure the cmos battery is good. if it not and it not holding bios settings speeds like the cpu and ram can change. on older mb it can be a bad clock chip or memory controller or bad ram stick. try another test stick of ram. if the speed strill wont lock in it the clock chip or memory controller.