Solved! - Macbook Pro Mid-2012 Bottom Ram Slot

Second ram slot not doesn't work ram slot 3 and 4 not working In case you have an uneven number of RAM modules, you'll have to mix and match RAM for configuration It could cause issues, and multi-channel ramses legacy slot It's not impossible that you had some issue with the contact pads on the CPU , which could mess up one of the memory

ramesses riches slot I bought four 8GB RAM sticks for the four slots on the motherboard I can only get the BIOS to see two of the four at a time… If I take a