you are confirming what I wrote here few days ago on intel forums: https://communities.intel.com/message/243800#243800 In short: 12.x -> apm disabled by default 13.x -> apm enabled by default We need an answer from intel: why 12.x drivers don't use apm? why 13.x are enabling apm for the same disk? Are 12.x drivers ignoring apm or are 13.x ones forcing it? If apm default values are already written somewhere on the drive (firmware), one of the two driver is clearly overcoming/misreading the correct apm settings. I know, we can use the appropriate tools to change apm values via software (or with other low level utilies to make the changes permanent), but Intel drivers should comply with the apm values decided by the vendor for that specific model.