You have updated the Mobo BIOS right ? I remember some youtuber had a hell of a time trying to get 9900Ks to work properly only to find at the very end that he needed to update the Mobo BIOS. Here is that link although his problem was different Are you also saying that the 9900K on the same motherboard with same setting can fly higher then 127W but with the same settings on same motherboard, the 9900KS is restricted to TDP ? This video from Gamers Nexusshows how different motherboard vendors is handling the EPS powers differently. May be you need to change your Mobo to Gigabyte ? May be MSI is following restrictions like ASUS. You may need to reach out to MSI suppport via Facebook etc. I have reached out to them before and they are usually quite responsive.