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Windows 7: SSD Performance reduced after BIOS update.

17 Mar 2012   #11

Windows 7 Ultimate 64bit

Quote   Quote: Originally Posted by ignatzatsonic View Post

Is your BIOS set to defaults in all cases?

Or have you made some changes in the BIOS?

Did you have this issue with the old BIOS??

Or did it begin after you flashed to the new BIOS?
Almost default only changed some settings, like ahci is enabled.
I enabled achi after OS was installed, might it cause issues like this?
Anyway achi is enabled correctly, made change in registry, booted pc and enabled ahci. I had this issue with the old BIOS too. Should i try default settings? Also with IDE mode?

My System SpecsSystem Spec
17 Mar 2012   #12
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8

If you enabled AHCI in the OS first and then in the BIOS, there should be no problem. But I would try IDE for a test anyhow.
My System SpecsSystem Spec
17 Mar 2012   #13

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium SP1, 64-bit

I frankly have no idea why the SSD is not seen in the BIOS if the external is connected.

As a first troubleshooting step, I would disconnect the external, set BIOS to defaults, and then look at all possibly BIOS settings that may have an effect on this.

What is the history of this external drive? Has it ever had an OS of any type on it or has it always been a data drive?

Do you get the same behavior if you connect the external to another port?

Do you get the same behavior if you connect the SSD to port 0?
My System SpecsSystem Spec

17 Mar 2012   #14

Windows 7 Ultimate 64bit

Strange, I changed ahci to ide mode and its booting to windows normally with external hdd plugged in...
soz its just because of ahci mode. It doesnt mind but sometimes its pisses me off cuz i always forget to unplug my external before boot. Any ideas to fix it?
My System SpecsSystem Spec
17 Mar 2012   #15
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8

Well, the quick solution is to leave it in IDE. The performance difference is minimal and you will probably not notice it. Some spinning disks just do not work with AHCI and when the BIOS checks the devices it probably kicks you out.
My System SpecsSystem Spec

 SSD Performance reduced after BIOS update.

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