hello so i need help, im having a trouble about my memory in my old computer because it uses only 3.9gb and the 4.1gb is in hardware reserved. all this happens after i install a new cpu on it. I've tried doing all the possible fixes like configuring the msconfig, registry, updating bios, reinstalling windows, and switching and cleaning the rams. the motherboard have only 2 dimm slots and 2x 4gb ddr3 1600mhz. I've also tried to go back to its old cpu and luckily it uses all 8gb of them but when i install the new one the problem occurs.