I purchased a pc that said it had 8gb of PC3-12800 DDR3-1600mhz. I added another 8gb's. Now I found out that the manufacturer actually put 8gb's of PC3-10600 DDR3-1333mhz so my pc is running at 1333mgz. Would it be better to add another 8gb of PC3 12800 for a total of 24gb's running at 1333mhz. or take out the 1333mhz and have 16gb's running at 1600mhz?