ASUS Prime B660 plus D4 will not boot- can't even see my SSD

[Stuart391]

Hi guys.

Got a brand new Asus Prime B660 Plus D4 mobo.

Fitted and connected every as usual, CPU, Fans, SSD, Blu-ray Drive, WiFi Card, Usb card etc 

The mobo will not boot, just goes straight to Bios, when it shows " Press and key to boot from cd/dvd" and I press any key it just goes straight back to Bios....my SSD doesn't even show up in boot menu.

CSM is not available to click as it's greyed out, and now can't even remember how I got the Bios to recognise the Bdr drive now either 

Please help guys...... I've tried all the YouTube videos and Asus YouTube videos for the last two weeks  and now feel like throwing this Mobo in the bin.

Never have I had sooooo much trouble replacing a mobo on a pc.

Any got any advice guys?

Thanks in advance 👍

[smyasin]

>>Main screen ( EZ Mode [F7] )
>> Intel rapid storage technology > Select off ( if Turn On ! ) 

Additional instructions:
If your motherboard's BIOS is Last Version , I recommend the following:
Please locate and enable the VMD Controller option, if available, as shown in the image below.
Then, for further assurance, disable the two options below. If it doesn't work, enable them and test again.

[Stuart391]

Hi mate 

Thanks for the advice.

It can see the SSD but won't let me use it as a boot device.....I can't see it anywhere else in the Bios.....and I will try everything you suggested.

Any advice on my info above, and how do I switch on or off AHCI in the Bios as I can't seem to find it in the Bios?

Thanks in advance

St