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Windows 7: AHCI : Enable in Windows 7 / Vista


07 Feb 2010   #119
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 
AHCI : Enable in Windows 7 / Vista

AHCI : Enable in Windows 7 after OS install

AHCI Advanced Host Controller Interface makes...

My System SpecsSystem Spec
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18 May 2010   #120
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Hello Gu1air, welcome to Seven Forums!



I'm glad you found a solution; thanks for the post.

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18 May 2010   #121
atlcraig

Windows 7
 
 

Dave76

My SSD is my C drive. The is why I got the boost in Performance. I have downloaded the performance software you suggested, but haven't had time to run it yet. When I do I will post the results on the places you said.
My System SpecsSystem Spec
19 May 2010   #122
Dave76

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64
 
 

Looking forward to seeing them
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20 May 2010   #123
roknrob

Windows 7
 
 

Add my kudos for an excellent and straightforward fix! Thanks!
My System SpecsSystem Spec
20 May 2010   #124
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Hello roknrob, welcome to Seven Forums; I'm glad it could be a help.
My System SpecsSystem Spec
23 May 2010   #125
siadi

w7u-x86
 
 

Quote   Quote: Originally Posted by WindowsStar View Post
Question: Do these steps work for Windows XP Professional as well?
you can update your SATA controller driver to the AHCI version using the right driver(s) then reboot ur machine and set AHCI in BIOS to enable (whatever the words are in BIOS)

Quote   Quote: Originally Posted by LM2008 View Post
no AHCI drivers message appeared or asking to restart, is there anyway to verify is active?
if u can get to windows after setting it then it works.

Quote   Quote: Originally Posted by atlcraig View Post
Just an update of what I found out about ahci performance! After I installed and got ahci working I checked for any performance change in Windows 7 hard drives. My drive performance before I changed to ahci was 5.4 and after the change it was still 5.4. I then installed a SSD as my C drive and my drive performance went from 5.4 to 7.1! If I would have known this before I started I don't think I would have changed to ahci. So my advice to anyone wanting to increase the drive performance on their system would be to go out and buy a SSD.
basically SSD is much much faster than harddisk, so the WEI gain is very understandable.

imho and based on my own experience after setting AHCI in Windows 7, benchmarks don't justify real-time performance but i see significant gain in copying large files (mkv files @ 1-8gb)

now the Q : after setting AHCI i got my 2 harddisks showed in the Safely Remove Hardware systray icon. is there any way to solve this? coz i think it's a bit annoying.
My System SpecsSystem Spec
24 May 2010   #126
ZaLiTH

 

Quote   Quote: Originally Posted by siadi View Post
now the Q : after setting AHCI i got my 2 harddisks showed in the Safely Remove Hardware systray icon. is there any way to solve this? coz i think it's a bit annoying.
To quote from Wikipedia, and to be honest I thought it would have more on AHCI, but apparently not... Anyway, to explain why AHCI mode shows your drives in the 'Safely Remove Hardware' list:
Quote:
AHCI is separate from the SATA 3Gb/s standard, although it exposes SATA's advanced capabilities (such as hot-plugging and native command queuing) such that host systems can utilize them.
My System SpecsSystem Spec
24 May 2010   #127
siadi

w7u-x86
 
 

Quote   Quote: Originally Posted by ZaLiTH View Post
Quote   Quote: Originally Posted by siadi View Post
now the Q : after setting AHCI i got my 2 harddisks showed in the Safely Remove Hardware systray icon. is there any way to solve this? coz i think it's a bit annoying.
To quote from Wikipedia, and to be honest I thought it would have more on AHCI, but apparently not... Anyway, to explain why AHCI mode shows your drives in the 'Safely Remove Hardware' list:
Quote:
AHCI is separate from the SATA 3Gb/s standard, although it exposes SATA's advanced capabilities (such as hot-plugging and native command queuing) such that host systems can utilize them.
so the quote is saying that my drives being shown in "safely remove" list due to this hot-plugging capability.. cmiiw. thx man.. then i will have to pay extra attention when removing external devices after this hehehe
My System SpecsSystem Spec
25 May 2010   #128
ZaLiTH

 

Quote   Quote: Originally Posted by siadi View Post
so the quote is saying that my drives being shown in "safely remove" list due to this hot-plugging capability.. cmiiw. thx man.. then i will have to pay extra attention when removing external devices after this hehehe
Yup, that is correct.. I've had to do much the same, but at least here we can be glad that MS finally got Windows to show the volume label in the 'Safely Remove Hardware' list! Something that should've been included since XP as far as I'm concerned... You do get quite used to it though.


@ Bare Foot Kid:
Just a thought, but I only just noticed your open post doesn't really mention any reasons or benefits for switching to AHCI.. Thinking about it now, I actually went to Google it and see what AHCI was and what was different to normal SATA when I first found this tutorial.

Perhaps to enhance it a little bit, at the start you could mention a brief description of the NCQ process (more info here) that AHCI uses? Might also be an idea to mention that AHCI also enables hot swapping support for SATA devices.. Just some constructive criticism, hope you don't mind.
My System SpecsSystem Spec
25 May 2010   #129
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Hello ZaLiTH, this is the first paragraph in the tutorial; reasons and/or benefits are subjective, at best, so I didn't want to go into that; this is just to show people a way to accomplish this, thanks though.



Quote:
AHCI Advanced Host Controller Interface makes NCQ Native Command Queing along with hot-plugging or hot swapping through SATA Serial-ATA host controllers possible; Vista was the first to offer this feature. The issue with AHCI is it needs to be enabled in the BIOS prior to OS installation; doing so after you have installed the OS will disable the PC. The reason why is Windows disables the AHCI drivers not needed durring installation.
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 AHCI : Enable in Windows 7 / Vista




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