Looking to upgrade your RAM, SSD, flash cards, USB drives or performance DRAM? Crucial currently has a deal where you can save $10 when you order $100 or more. Give it a whirl. My old MacBook was upgraded with 2GB of RAM and never had any problems. My latest rig, Penryn MBP, will see a bump in RAM to 4GB from Crucial later this week so look for a review as well as new benchmarking numbers.
