It was just recently that I noticed my MBP would have issues with Bank 1 showing as Empty when checking System Profiler. I would have to open up and reinsert the RAM and it would show up again, only for it to randomly disappear again, repeating the process all over again. I had a Boot Camp partition, and once I deleted that, then all my RAM reappeared and this worked for a while, with the RAM disappearing less frequently, but I reinstalled Windows on several occasions to have the RAM disappear again. I tried numerous combinations of RAM, including 2x2 GB and 2x4 GB, and by testing different RAM sticks in each slot, I assume the problem isn't with the RAM itself, but something else. I can run the computer with half the RAM available, but I would like access to all my memory. I don't know whether it's a problem with the hardware or only when having a Boot Camp partition, as it happens much more frequently with the latter scenario. Has anyone else experienced issues such as this, and would I be able to take it to the Apple Store to get it fixed? If this is a problem with the logic board itself, I know it can get quite costly to fix.