My mom picked up a refurb MacBook Pro. We used the migration assistant to pull everything from her PowerBook (which had a full 40 GB drive)...but it seems to be running really slow. I'm going to back up her data and reinstall fresh and manually copy her important data back. In the meantime, however, I ordered 2 GB of RAM for my MacBook and pulled out the 2x 256 MB sticks. She's got a single 1 GB stick in her MacBook Pro (it's Core 2 Duo). If I stick one of my extra 256 MB sticks in the MBP, will it run faster (1.25 GB), or will it run slower due to it not being paired?