Windows 7: ASUS P8Z68-V BIOS Settings

kevindd992002 · 13 Oct 2011

In my motherboard's BIOS settings, there are three USB settings that can be changed.

1.) USB Legacy Support
2.) USB 3.0 Legacy Support
3.) EHCI Hand-off

I'm at Windows 7 x64, do I need to disable them all?

Would keeping the USB/USB 3.0 Legacy Support enabled still use the driver installed in Windows 7 or will it override and use the built-in USB drivers in the motherboard?

How about EHCI Hand-off?

Beta · 13 Oct 2011

No, do not turn them off.

DMHolt57 · 13 Oct 2011

For Windows 7 and forward use both legacy support enabled and EHCI off by default.

kevindd992002 · 14 Oct 2011

Quote: Originally Posted by DMHolt57

For Windows 7 and forward use both legacy support enabled and EHCI off by default.

Why? Windows 7 has their own drivers right? Won't they interfere with Windows 7's native drivers when enabled?

alphanumeric · 18 Oct 2011

The way I understand it "USB Legacy Support" is what lets you access your BIOS with a USB keyboard. If you disable it and don't have a PS2 keyboard connected you won't be able to access your BIOS settings.

kevindd992002 · 18 Oct 2011

Quote: Originally Posted by alphanumeric

The way I understand it "USB Legacy Support" is what lets you access your BIOS with a USB keyboard. If you disable it and don't have a PS2 keyboard connected you won't be able to access your BIOS settings.

Yup but when you enable that setting won't it interfere with Windows 7? Will Windows 7 use its own native USB drivers if that is enabled?

alphanumeric · 18 Oct 2011

I don't think it has anything to do with drivers and nothing to do with windows 7. Enabling it causes a USB keyboard to be emulated as a PS2 keyboard in BIOS. I could be wrong but thats my understanding. It sounds like you're going to disable them anyway so go ahead and do it and see what happens.

kevindd992002 · 18 Oct 2011

Quote: Originally Posted by alphanumeric

I don't think it has anything to do with drivers and nothing to do with windows 7. Enabling it causes a USB keyboard to be emulated as a PS2 keyboard in BIOS. I could be wrong but thats my understanding. It sounds like you're going to disable them anyway so go ahead and do it and see what happens.

I do plan on disabling them because I'm not gonna use them. Oh and even if they are disabled, I can use my usb mouse and usb keyboard in the UEFI BIOS. It's just that I cannot use them in legacy operating systems and even in DOS. My main concern though is that if they are disabled won't it affect Windows 7 in any way?

alphanumeric · 18 Oct 2011

I don't know to be honest, I thought I knew what that setting meant but a Google search has me wondering if the meaning hasn't changed over the years.

Windows 7: ASUS P8Z68-V BIOS Settings

ASUS P8Z68-V BIOS Settings problems?