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Disadvantages of enabling AHCI after Win7 install

I've formatted my notebook that has a 5400RPM HDD with ~500GB capacity.

After installing Windows 7 and about half the drivers (including chipset) I began to doubt whether to go for IDE or AHCI mode for my hard drive. There used to be a lot of discussion on the internet which is better and so far I understood it was particularly helpful on SSDs. Now the general consensus seems to be that AHCI mode is best for most hard drives. I have thus enabled AHCI in the middle of configuring my notebook (rest of the drivers, necessary software etc...)

Two questions:

  1. considering my HDD's spec above, should I leave it on?
  2. Is there any disadvantage of enabling it after Windows 7 and chipset drivers installation?

Windows 7 version is 64 bit Home Premium.

1 Answer

Should I leave on AHCI?

Yes. It allows you to access hard drive performance features IDE simply doesn't have.

Is there any disadvantage to switching after Windows 7 and chipset drivers installation?

YES. Tweaking this after install, while possible, must be very carefully done, potentially requires many windows registry changes, depends on your chipset, and I, as a long time power user, have managed to make a system un-bootable doing it.

As far as I'm concerned, there is absolutely no reason to use IDE mode unless your hard drive or motherboard simply doesn't support AHCI.