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Windows 7: AHCI : Enable in Windows 7 / Vista

07 Feb 2010   #219
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
24 Jul 2010   #220
Mulaka

Windows 7
 
 

That's just it guys, I have the latest nVidia drivers installed, and it still shows up like the screenshot.


My System SpecsSystem Spec
25 Jul 2010   #221
Buggsy2

windows 7
 
 
OCZ says do not activate AHCI

OCZ Technology says not to activate AHCI:

AHCI
AHCI is not official supported on OCZ SSDs and may under some circumstances affect performance, specifically during windows installation. Enabling AHCI can result in higher performance in synthetic benchmarks for SSDs and HDDs alike, but can cause hang-ups and intermittent freezes in SSDs since it allows multiple access requests to compete for a drive that is not made to address re-ordering of commands in the queue. We recommend AHCI is set to disabled in both Windows and in the BIOS.
Native Command Queuing greatly increases the performance of standard rotational drives but it has no bearing on SSDs.
My System SpecsSystem Spec
25 Jul 2010   #222
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Quote   Quote: Originally Posted by Buggsy2 View Post
OCZ Technology says not to activate AHCI:

AHCI
AHCI is not official supported on OCZ SSDs and may under some circumstances affect performance, specifically during windows installation. Enabling AHCI can result in higher performance in synthetic benchmarks for SSDs and HDDs alike, but can cause hang-ups and intermittent freezes in SSDs since it allows multiple access requests to compete for a drive that is not made to address re-ordering of commands in the queue. We recommend AHCI is set to disabled in both Windows and in the BIOS.
Native Command Queuing greatly increases the performance of standard rotational drives but it has no bearing on SSDs.


They should get Intel then eh, I've been using my Intel X25 M 80GB G2 for about 10 months and haven't had one single issue; I couldn't count the number of re-installs (with 'clean all' - secure erase) I've done while working on this.


SSD / HDD : Optimize for Windows Reinstallation



Thanks for taking time to post the info though.
My System SpecsSystem Spec
25 Jul 2010   #223
Dave76

Microsoft Community Contributor Award Recipient

Windows 7 Ult x64 - SP1/ Windows 8 Pro x64
 
 
OCZ says USE AHCI for BETTER performance

Quote   Quote: Originally Posted by Buggsy2 View Post
OCZ Technology says not to activate AHCI:

AHCI
AHCI is not official supported on OCZ SSDs and may under some circumstances affect performance, specifically during windows installation. Enabling AHCI can result in higher performance in synthetic benchmarks for SSDs and HDDs alike, but can cause hang-ups and intermittent freezes in SSDs since it allows multiple access requests to compete for a drive that is not made to address re-ordering of commands in the queue. We recommend AHCI is set to disabled in both Windows and in the BIOS.
Native Command Queuing greatly increases the performance of standard rotational drives but it has no bearing on SSDs.
The address "res_old" makes me wonder just how old this article is.

Can you post the address that it originated from?

This is for early editions of their SSDs.

Edit:
From the OCZ support site,
If using an Intel chipset based system please use the newest Intel chipset drivers for Vertex LE, vertex2 and Agility2

Quote:
For now its important you use the Intel chipset driver for ahci mode.
This is for the gen2 versions, with FW updates AHCI should be the best way to go on all OCZ SSDs.

And this from 'Official Staff':

Quote:
I see arguments and conflicting advice...so lets settle the debate here in this thread before i write a new guide.

At this time when I test a system i do the following tweaks and NOTHING ELSE..

1) I check the board is in AHCI mode, if no option is available there is nothing you can do.

... (see the link for more)

The SSD forum here has got cross saturation from the gen1 forum where tweaks were needed. Vertex, Agility, Turbo and Summit are all what we call Gen2 and do not need tweaking at all. On the most part Windows 7 in AHCI mode will do all the tweak you need for single disk operation all by its self...it looks like people on the whole have forgotten that part.

Please, take care to post accurate information, we don't want to give the wrong guidance to other viewers.
My System SpecsSystem Spec
.


26 Jul 2010   #224
dengland

Windows 7
 
 

Thanks ! Just what I needed.
My System SpecsSystem Spec
26 Jul 2010   #225
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Hello dengland, welcome to Seven Forums; glad we could be a help.
My System SpecsSystem Spec
02 Aug 2010   #226
bearcave

Windows 7 Professional 64bit
 
 

Hey All,

First off my system:
Motherboard: Asus P7P55D Pro
CPU: Core i7 2.8ghz
Video Card: ATI 5850
Ram 8gb DDR3
HDD: 500gb Sata II
OS: Windows 7 Pro 64bit

My problem.

I followed the tutorial, went into the registry, and tried to edit the value of msachi and noticed that start was already set to 0. I then went into bio and set it to ACHI mode. Upon reboot the computer got to the nice little windows 7 orbs that form the logo and then rebooted. I switched back to IDE, returned to windows figuring I had to download the drivers.

I went to the Asus site and found the Intel Sata drivers. When I tried to install them it said "you do not meet the minimum system requirements" I then went to the intel site and downloaded their "Matrix Storage manager" and "Rapid Storage Technologies" Upon trying to install each of these I got the same "minimum system requirements error".

At this point I am out of ideas, and would value any suggestions.
My System SpecsSystem Spec
02 Aug 2010   #227
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Hello bearcave, welcome to Seven Forums!





If the value in the registry was at ' 0 ' to start with, AHCI was already enabled in Windows.
My System SpecsSystem Spec
02 Aug 2010   #228
bearcave

Windows 7 Professional 64bit
 
 

Quote   Quote: Originally Posted by Bare Foot Kid View Post
Hello bearcave, welcome to Seven Forums!





If the value in the registry was at ' 0 ' to start with, AHCI was already enabled in Windows.
That's what I had figured,

but why then would it just continually reboot when I set it to AHCI mode in the bios?
My System SpecsSystem Spec
02 Aug 2010   #229
Bare Foot Kid
Microsoft MVP

W 7 64-bit Ultimate
 
 

Quote   Quote: Originally Posted by bearcave View Post
Quote   Quote: Originally Posted by Bare Foot Kid View Post
Hello bearcave, welcome to Seven Forums!





If the value in the registry was at ' 0 ' to start with, AHCI was already enabled in Windows.
That's what I had figured,

but why then would it just continually reboot when I set it to AHCI mode in the bios?



Something is out of order, if it's not/wasn't set in the BIOS to AHCI, Windows automatically disables the AHCI drivers during OS install.
Do you have a lot of data to lose if you re-install; just asking.



These are the wrong ones, as far as I know; I haven't used this technology.

Quote:
Matrix Storage manager" and "Rapid Storage Technologies"
My System SpecsSystem Spec
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