Ok so my dad said he has 2x 4GB DDR3 RAM sticks from his PC that he can give to me. I tried replacing 2 of my 4 sticks to increase the RAM from 12GB to 16GB but my PC gets stuck at the splash screen. (I replaced 2x 2GB sticks with the 2x 4GB sticks). I cannot get into the BIOS either. So I then tried just the ones my dad gave me so I had 8GB RAM with 2 slots available and that didnt work either. (I tried different slots too). I'm sure they're working because my dad got them with his prebuilt machine but upgraded his RAM so he took those out. Basically never used. Any help?