This post may not be too relevant, but I like to get all of the performance I can from my PC and well, if I can also optimize the I/O, even better. I've tried 5 SATA drivers and all of them are, well, different. If I use the ones Windows Update gives via device manager, I get some recent ones (right now, I have 2, one from 2019 and from 2020, called Intel R C220 series, this from hitting update device driver a couple of times). These 2 drivers make the boot slower, even on an SSD. I've tested this and happens without a shadow of a doubt. Then I downloaded a couple from Win-Raid where Fernando posted different SATA drivers and tests: https://www.win-raid.com/t25f23-Which-are-the-quot-best-quot-Intel-AHCI-RAID-drivers.html I downloaded 2 he recommends for 4th gen and 5th gen Intel systems; with these drivers the system boots faster than with the Windows Update drivers, but these 2 drivers seem to have a small bug: They make my secondary HDD park its head after 128 seconds and I can hear them parking, no matter what I configure, so any operation related to HDD storage will make it click because it powers up again. This does not happpen with Windows Update drivers or Microsoft Standard storage driver. This does get fixed if I use any program to manage APM in Windows so the clicking stops, but does not change the fact that I get that bug with those drivers. However, the fastest boot time happens with the "bare" MS Standard ACHI driver, so should I just keep this one? I really can't see any new functionalities on newer SATA drivers and the ones Windows Update gives me make boot slower, which for me looks like a downgrade? Or maybe they load more stuff and features to make things faster? Thanks in advance anyone who wishes to discuss this topic.