Based on your description, if you installed the operating system while having the chipset mode set as RAID there should not be a driver’s conflict but in the case that it was set as AHCI first and then changing the status it may cause problems so my best recommendation is to start from scratch having the chipset mode set as RAID.
Also, I noticed that you are using a SSD as system drive. The acceleration option will not be available when trying to accelerate a SSD using another SSD. This is because the SSD works faster than a regular HDD so the acceleration option is not going to be available for this task.
You can use the acceleration feature to accelerate a regular HDD as system drive or storage but it is not possible to accelerate a SSD.
You can check more information about the Intel® Smart Response Technology at the following link: