Can DDR and SDRAM be used in the same system at the same time?
No. Even though there are systems that support both technologies, you can’t have DDR and SDRAM in the same system at the same time. You’ll have to choose one or the other. “Have you ever gotten a “great deal” on a system and then been a little disappointed with its overall performance? If so, this article on Crucial’s Web site is for you. Get the information you need to figure out whether or not upgrading your system would be worth the money.