my motherboard uses ddr4 ram. im currently have 8gb of ram and the 4gb ram is also ddr4 (i check it before that pc died)Can you link to this Flex mode that you're asking about?
Your motherboard supports standard DDR3, what type of memory is your old PC using?
aww rip i cant do 12gb ram thenYour motherboad only support dual memory architecture, rather than flex mode. Therefore, to salvage 4 gb ram, you can only run the 2x 2GB set in dual-channel mode.