I am running on a Mushkin 2GB DDR2 800MHz stick of RAM right now. I was running two sticks, but one was faulty and burned out. I am looking to get another 2 gig stick, but I want to be sure before I do. Should the brands be the same? It might be a stupid question, but I've been surprised by incompatibility before. I would imagine all that matters is that I'm running another 2 GB stick of DDR2 800MHz across from it, but I don't want any surprises. Any helping words?