When checking out different prices on memory, I come across ones that have an SLI symbol next to the picture. If I want to run dual PCI-E cards in SLI configuration, do I need to buy new memory that has that little SLI emblem on it? I know it seems like a dumb question, but I have found out with so many things, that if certain things arn't matched up right then the computer won't run as efficient as it should, if it does run at all. Thank you for your time and help.