Chosen Solution

can I replace the motherboard of ASUS Q302L Core 13-4030U with the motherboard of TP300L Core i7-4770S also called I7-4th Gen? Update (08/23/2022) my old motherboard has 6GB ram and the new one has 4 GB ram is it not going to be any issue?

Yes, it should work fine because TP300L Core i7-4770S supported both types of RAM memory like DDR3-1333/1600, and DDR3L-1333/1600. So, the old motherboard RAM should be supported by this motherboard. Finally, you have to check by replacing.