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AHCI vs IDE

post #1 of 29
Thread Starter 
So what's the deal between the two?

My desktop computer in my sig is defaulted to the IDE mode. I take it's not too bad if I use mechanical hard drives, but when I update to an SSD I should change it to AHCI.

1. Can I change it to AHCI if I already installed my OS?

2. How do I know I am running in AHCI vs IDE in my laptop if I cannot go in the bios?
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post #2 of 29
info

1. You have to install AHCI drivers

2. you have to get into the bios to turn ahci on, so if you have a locked bios, youre out of luck.
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post #3 of 29
Thread Starter 
Quote:
Originally Posted by joemaniaci View Post
info


2. you have to get into the bios to turn ahci on, so if you have a locked bios, youre out of luck.
How do I check what mode I'm running without going into the bios?
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post #4 of 29
Quote:
Originally Posted by homestyle View Post
How do I check what mode I'm running without going into the bios?
I would just boot into BIOS and check. It's the easiest and most accurate way to tell if your running AHCI or IDE
post #5 of 29
It depends on what SSD you buy. For my OCZ Vertex they state that using the Intel ICH10R controler on my board to use the default MS AHCI driver. They say you get better performance and compatibility.

Although when I switched from my RAID0 Raptors to my SSD and WD Black I noticed that the DVD drives take a long time to recognize discs now for some reason.
post #6 of 29
Thread Starter 
These AHCI drivers... are these on the OS level or the motherboard bios?
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post #7 of 29
AHCI is faster than IDE and supports NCQ. But if your drive doesnt support NCQ it makes no sense to use AHCI. Just leave it in legacy mode.
    
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post #8 of 29
Quote:
Originally Posted by homestyle View Post
These AHCI drivers... are these on the OS level or the motherboard bios?
You will need to reinstall your OS if you switch over to AHCI. You will see posts on how to force windows to recongnize AHCI if you try to switch without reinstall but it will bring problems later on down the road.
    
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post #9 of 29
Quote:
Originally Posted by aleiro View Post
You will need to reinstall your OS if you switch over to AHCI. You will see posts on how to force windows to recongnize AHCI if you try to switch without reinstall but it will bring problems later on down the road.
I don't think so but it could vary from mobo to mobo. Mine for example, I am pretty sure I just need to install the drivers and activate in bios.
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post #10 of 29
Thread Starter 
I have the Lenovo X61T and installed an OCZ Agility 60 GB SSD.

The laptop runs fine on compatibility, but when I try AHCI, the system can't boot into windows and just bsod.

I have windows 7 32bit installed.

Any ideas?
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