supports DDR3/DDR3L SO-DIMM RAM.
what type is this "m471b5273ch0-ck0" mentioned that you currently have?
http://www.asrock.com/mb/intel/q1900-itx/
this board appears to be a very limited one. states only one processor supported, though that may be an oversight. it could be any Celeron J1000 series.
only 2 RAM DIMMs, no PCIe x4/x16 slots available for GPU or add-on cards.