Just took it out and it was extremely hot, placed it back into The 4th slot instead of the 2nd slot after letting it cool down and now the mobo registers it
Mixing ram is hit and miss , you have a 50\50 shot of it working. Even identical modules purchased at different times can be incompatible.
I just checked my BIOS settings and it says that it hasn't recognised the 1x8GB RAM in the slot that i have it in, anyway to make the mobo actually recognise it?
Just took it out and it was extremely hot, placed it back into The 4th slot instead of the 2nd slot after letting it cool down and now the mobo registers it