Chosen Solution

Hey everybody, I upgrade my iMac (Blade SSD + SSD + RAM) and I have a problem. My iMac doesn’t start up properly but only if I press PRAM reset at the start and then he starts properly. I exclude it’s an hardware problem, but I see it like a software/firmware problem. Suggestions?

Go under the Apple icon to System Preferences > start up disk > unlock it > select the start up disk and close and restart.

look up the settings key and change the setting to ahci from regular hdd setting load driver change boot order lots of things but the recovery and setup is on the orignal hdd i think