Hi,
Over 4 years ago I built a PC for a cousin of mine. The budget was kinda so I had to make some sacrifices. Relevant parts are:
ASRock H100M-DGS
i5-6400
DDR4 GeIL Pristine, 1x8 GB, 2400MHz, CL16 GP48GB2400C16SC
Now he asked me to suggest a RAM upgrade and I'm at a bit of loss. The ark.intel page says the processor supports up to DDR4-2133. The motherboard's QVL page only lists DDR4-2133 sticks but it obviously hasn't been updated for quite some time. The first things that comes to mind is 2x8GB sticks but then what? Is there any point in going for higher frequencies? Will it even boot? As I cannot seem to find any reliable sources I would like to ask for Your help in the matter.