Question: In a nutshell, the problem looks like this picture:

enter image description here

In short, gigantic latency, very slow read speed (I assume that is caused by the same thing). After a very very painful few minutes, everything seems to go back to normal.

What the heck is going on that can cause that?

Note: Note the fact that 100% activity happens at a wide range of speeds.

Answer: I had the same issue.I resolved it by changing the power plan from ‘Balanced’ to ‘High performance’.Instant results.