[SOLVED] New MOBO doesn't find old disk with windows

klaflo

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Nov 13, 2020
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Hello,
I have just bought a new mobo for PC which is ASUS PRIME B460M-A R2.0.
Mobo recognizes my old disk: Samsung SSD 850 EVO but doesn't find it as bootable media...
I've googled a bit and I have seen that I should maybe enable CSM mode but it's greyed out and disabled on this specific bios not sure why...
Then I've also read that disabling fast boot and secure boot could enable CSM mode to not be greyed out but it didn't help, it's still greyed out and also disk is not visible as bootable media...
When I plug this disk back to my old mobo everything works. Does anyone know what seems to be the problem?

Thank you in advance!
 

USAFRet

Titan
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Mar 16, 2013
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Additionally, was the 850 EVO the only drive connected when you did the original install on the old system?
If not, the boot partition likely exists on whatever other drive was in the system.

In any case, though...new motherboard -> fresh OS install.
 

USAFRet

Titan
Moderator
Mar 16, 2013
153,653
10,991
175,990
24,031
Additionally, was the 850 EVO the only drive connected when you did the original install on the old system?
If not, the boot partition likely exists on whatever other drive was in the system.

In any case, though...new motherboard -> fresh OS install.
 

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