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]

Hello,
What is the model of your SSD? Is it SATA or NVMe?
Have you checked the other slots?
Does this issue persist with the default BIOS settings?

In some scenarios, it's mentioned that occupying multiple PCI slots can disable SATA ports or M.2 slots. Make sure to review your motherboard's manual.

[Stuart391]

Hi There
My SSD is a Samsung Evo 860 I believe.....I've checked all other slots and unplugged any pcie slots that were being used.....yeah it persists with default bios settings.
Any help would be brilliant....it can see the drive but won't let me boot with it.....the drive has been formatted....can it be initialised in the Bios?

[smyasin]

It seems the issue is a combination of BIOS settings and SSD recognition.

I couldn't find your SSD model in the supported storage devices list for this motherboard, but if you have a SATA SSD, the issue shouldn't be overly complex.
Here are a few steps to help with troubleshooting:

Ensure the SSD is partitioned as GPT for UEFI systems.

If your SSD is recognized and its name appears in the BIOS, follow these steps:

In the BIOS, make sure the SATA mode is set to AHCI.
Important: It is recommended to install the operating system via a USB flash drive. Use a tool like Rufus to make the USB bootable with your desired OS (e.g., Windows 10 or 11). This ensures the installation process goes smoothly.

If you're installing the OS via a disk, you may need to use CSM. If the CSM option in the BIOS is grayed out, you might need to disable Secure Boot first. After disabling it, you should be able to enable CSM.

If you've followed all the steps above and the issue persists, test the process with another SSD.

If none of these steps resolve the problem, it might be a motherboard issue.

[Stuart391]

By the way....it's a standard SSD not an M2 ssd