Asus N13219 Motherboard Manual -

DDR2 or early DDR3 (usually up to 4GB or 8GB max).

Since "N13219" is just a compliance label, you need to look for the silk-screened text printed directly on the PCB (the circuit board). asus n13219 motherboard manual

If you can provide the chipset name (the big chip under the heatsink) or a photo of the board, I can help you identify the exact model and find the right pinout diagram. DDR2 or early DDR3 (usually up to 4GB or 8GB max)