Simply put, there are no guarantees if the sticks will even play together, and if this is a prebuilt it's doubtful if you can make adjustments in the BIOS to try and get them to play if there is any problem
Thats not possible and I won't do that because it can make system unstable. You have to use RAM with same frequency and timing or the better option exactly same RAM
Simply put, there are no guarantees if the sticks will even play together, and if this is a prebuilt it's doubtful if you can make adjustments in the BIOS to try and get them to play if there is any problem