I've recently upgraded my ASUS K45VD laptop from 2GB memory to 4GB memory by adding a 2GB stick. Then I got problems 2 times. The first time, asus's service said that the mainboard is down and they got me a another one. Everything was just fine until yesterday, it was down again while I was playing a heavy game (NFS 2012), it just went down and i can't even charge my laptop.
So at first, I thought i could be a problem with mixing the 2 rams of different model. But because I can't charge the laptop, it can be a problem with the power supply.
what is the difference between only 1 RAM (4GB) and using 2 RAM(2B). Or my power supply just cannot supply enough power for 4GB of memory?