Issues with bottom RAM-slot MBP 2012 - MacBook Pro 13

Issues with bottom RAM-slot MBP 2012 - MacBook Pro 13 ram slot 1 and 3 Look on mobo next to RAM slots, they should be numbered 0 & 1 or A0 A1 even if its 1 & 2, lowest number 1st 3 T level in digital production ram slot 13 or 24 My motherboard is a ASUS Prime Z270-K and the CPU is a I7-6700K The RAM is Ballistix Sport DDR4-2666 Slots 1 and 2 on my MB work fine but

ramayana slot 1 Try to fill 4 memory slot and check if display is coming or Try to fill 4 memory slot and check if display is coming or not Also