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Solved Attn. SSD owners - Enabling AHCI mode AFTER Windows 10 installation. - Windows 10 Forums
Easiest way to get into safe mode is Win+R key to open run dialog. type msconfig. Select the boot tab. Click the safe mode check box. Restart the computer.
To get out of safe mode do the same process in safe mode, but uncheck the safe mode check box.
They made safe mode a real PITA in Windows 10.
Maybe this is the best I can do with my system? So I could add a 3.0 controller card?
Some people believe RAPID Mode benefits them, it wll depend specifically on how you use it - I perceive no benefit to my SATA3 laptop nor do I perceive any on wife's SATA2 laptop.
Which version of Samsun Magician are you running - I thought latest, 4.9.5, would allow Rapid Mode for the PRO line now (IF you want to try RAPID Mode.
I would think there is possibility of adding a SATA3 controller, your system being a desktop - but my desktop is like 11 years old so I would let someone else give you a more specific answer on that.