Questions
Q1
Which Intel chipset motherboard will be able to support single side 4GB memory module?

Currently socket 1155 motherboard with Intel B75 / H61 / H67 / H77 / P67 / Z68 / Z75 / Z77 chipset will support single side 4GB memory module.

Older socket 1156 and 775 mainboard will not be able to support it.