There's a screenshot linked to in the comments [1] showing how you can query whether the mitigations are enabled, and showing the results for a 9900k. 1: https

There's a screenshot linked to in the comments [1] showing how you can query whether the mitigations are enabled, and showing the results for a 9900k. 1: https://www.anandtech.com/comments/13659/analyzing-core-i9-9900k-performance-with-spectre-and-meltdown-hardware-mitigations/625538 https://www.anandtech.com/comments/13659/analyzing-core-i9-9... - screenshot comes from anandtech.com