Hi guys, Sorry for starting a new thread, but I can't find an answer to this. I'm trying to find out if my machine is running slowly because of a lack of RAM. And to be clear, my reluctance to upgrade the RAM is purely financial as I've just purchased a late '09 Mini and put in a WD Black 750gb and a used set of 4gb RAM, which was very cheap! The machine is to serve as the media hub/work station. It's running OSX 10.9. Thanks to the forum the hardware install and cloning process went without a hitch. But it just shows that my Early 2011 MacBook Pro 13" is running quite slow, with a lot of "beach balls". It still has the stock 4GB Ram & 320GB 5200rpm HDD. My usage is just iTunes, Firefox, iPhoto,Office apps, etc with occasional video conversion. The obvious and easiest thing to do is go to 8GB RAM, 16GB is still too expensive. But as I said, that can't happen for a while..... But when I watch Activity Monitor, Swap remains at zero. Virtual Memory can increase with a lot of apps open. Under the "top" command in Terminal, it shows 0(0) in both pages in & pages out. The Mini is exactly the same and I'm thinking due to the 7200GB HDD, it just feels snappier. So finally the question(!): Am I not taxing the RAM? Would it make more sense to plan and go for an SSD, as it's the drive that's the bottleneck not the RAM. I don't here too many complaints from early MacBook Air users who are stuck with 2GB RAM while still running OSX 10.9. Eventually I'd like to whatever I do to my MacBook, to the Mini. Thanks!