My completely stock i7 MBP reports I have 3.88 GB RAM available. I thought that (0.125 GB = 128 MB) is reserved for Intel's iGFX, and I left it at that. But recently I've tried OWC's 8 GB RAM (2x4GB) and it did report full 8 GB of RAM. What gives ? Do you guys (with i5/i7 MBPs + 4GB) have your RAM reported correctly ? P.S. start Activity Monitor.app, and click on System Memory tab on the bottom to get to this report/piechart.