AHCI after windows 8.1 64 bit install

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toastedwholegrain

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May 10, 2015
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I found a post to do this https://pricklytech.wordpress.com/2014/02/04/windows-8-1-enabling-ahci-after-installing-windows/
Will it affect ssd speeds? Should I just format again?
Currently using
Pny cs1100 rated read speed 500mbs write 300mbs
970 gaming msi
8350fx amd
2x4gb patriot 1866
In task manager I haven't seen speeds over 70mbs from read or write. Is this because AHCI isn't on?
I'm in the middle of the millions of updates from windows so I haven't gone to bios yet
 
Solution
SinxarKnights


Actually I just read your MB manual. It is enabled by default so you should be good to go.

Depending on the capacity of your SSD the maximum speed will vary. It is load dependent. If you are intrested in learning about it, look up some reviews and note the 'queue depth' metric in many of the graphs and how it effects the overall speed of the drives being tested. I was unable to find any reviews on your model of SSD so I have no idea how it actually performs or even what type of controller it uses.

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SinxarKnights

SinxarKnights

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You can try to enable it. Most likely the low speed is because it doesn't have the proper load on it to maximize performance or perhaps your chipset drivers are not installed (or a combo of both).

Are you sure it isn't enabled already in the BIOS?

If it is not enabled in the BIOS, personally I would just reinstall since you just installed it anyway.
 
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SinxarKnights

SinxarKnights

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Actually I just read your MB manual. It is enabled by default so you should be good to go.

Depending on the capacity of your SSD the maximum speed will vary. It is load dependent. If you are intrested in learning about it, look up some reviews and note the 'queue depth' metric in many of the graphs and how it effects the overall speed of the drives being tested. I was unable to find any reviews on your model of SSD so I have no idea how it actually performs or even what type of controller it uses.

 
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Solution
SinxarKnights

SinxarKnights

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It is in Chapter 3 page 8 at the very top.

▶SATA Mode [AHCI Mode]
Sets the operation mode of the onboard SATA controller. The default mode is AHCI.

[Disabled] Disables the SATA function.
[IDE Mode] Specify the IDE mode for SATA storage devices.
[AHCI Mode] Specify the AHCI mode for SATA storage devices. AHCI (Advanced Host Controller Interface) offers some advanced features to enhance the speed and performance of SATA storage device, such as Native Command Queuing (NCQ) and hot-plugging.
[RAID Mode] Enables RAID function for SATA storage devices.
Click to expand...
 
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SBMfromLA

SBMfromLA

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If it's set to IDE now and you switch... your computer probably won't boot up unless you do a registry edit before shutting down.

Also, if you're using a SATA 3 SSD did you plug the SSD's data cable into a SATA 3 port on your motherboard? Does your motherboard support SATA 3?
 
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