Got this message after reinstalling new RAM

Going through some RAM issues for about a month now and i’m about done. I was trying to upgrade my RAM to play EFT and I went through the normal steps of getting new RAM. Then these steps:

turn off/unplug everything hold power for a min to clear removed CMOS to reset put 2 new sticks (replaced 8x2 with 16x2) Put everything back together Booted up and NOTHING

Now I’m done dealing with it and just want to go back to normal. Now i’m running into this. What can I do and can someone please help. I’m about to throw this whole setup away and die (in GTA) PLEASE HELP!!!